nestegg-calculators

io.github.VladimirWrites/nestegg-calculatorsVersion 1.4.0

90+ pure finance calculators: loans, investing, bonds, options, tax. Stateless, stores nothing.

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Connect

Streamable HTTP

https://nestegg.money/mcpResponds149 msNov 14, 2026, 14:43 UTC

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Claude Code

claude mcp add --transport http nestegg-calculators https://nestegg.money/mcp

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: nestegg-calculators
Remote MCP server URL: https://nestegg.money/mcp

Cursor

{
  "mcpServers": {
    "nestegg-calculators": {
      "url": "https://nestegg.money/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"nestegg-calculators","type":"http","url":"https://nestegg.money/mcp"}'

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Tools

99 tools

Tools of nestegg-calculators
	Description		Read-only	Idempotent	Open world
`accrued-interest`Accrued interest since the last coupon: the annual coupon pro-rated by days elapsed over the day-count basis.	Accrued interest since the last coupon: the annual coupon pro-rated by days elapsed over the day-count basis.	Not declared	Yes	Yes	No
`after-tax-yield`After-tax yield: a yield reduced by the tax rate. Percents in and out.	After-tax yield: a yield reduced by the tax rate. Percents in and out.	Not declared	Yes	Yes	No
`amortization`Monthly loan amortization schedule and summary. Supports dated extra principal payments and a rate-fixed period. detail controls output size: 'summary' (default) returns totals plus a per-year breakdown; 'monthly' returns the full schedule (paginate with offset/limit). Returns numbers and schedules; no advice.	Monthly loan amortization schedule and summary. Supports dated extra principal payments and a rate-fixed period. detail controls output size: 'summary' (default) returns totals plus a per-year breakdown; 'monthly' returns the full schedule (paginate with offset/limit). Returns numbers and schedules; no advice.	Not declared	Yes	Yes	No
`annuity-fv`Future value of an ordinary annuity. rate is the per-period rate in percent.	Future value of an ordinary annuity. rate is the per-period rate in percent.	Not declared	Yes	Yes	No
`annuity-payment`The level payment that amortizes a present value over n periods (the loan-payment formula). rate is per period.	The level payment that amortizes a present value over n periods (the loan-payment formula). rate is per period.	Not declared	Yes	Yes	No
`annuity-pv`Present value of an ordinary annuity (level payment at each period end). rate is the per-period rate in percent.	Present value of an ordinary annuity (level payment at each period end). rate is the per-period rate in percent.	Not declared	Yes	Yes	No
`balloon-loan`Balloon loan: payment based on a long amortization, with the balloon being the balance still due after the shorter balloon term.	Balloon loan: payment based on a long amortization, with the balloon being the balance still due after the shorter balloon term.	Not declared	Yes	Yes	No
`barista-fire`Barista FIRE: the nest egg needed when part-time income covers part of the spending, so the portfolio only funds the remainder at the safe withdrawal rate.	Barista FIRE: the nest egg needed when part-time income covers part of the spending, so the portfolio only funds the remainder at the safe withdrawal rate.	Not declared	Yes	Yes	No
`biweekly-payoff`Biweekly mortgage acceleration: paying half the monthly payment every two weeks. Returns the biweekly payment and the months and interest saved.	Biweekly mortgage acceleration: paying half the monthly payment every two weeks. Returns the biweekly payment and the months and interest saved.	Not declared	Yes	Yes	No
`black-scholes`Black-Scholes price of a European call or put option, plus d1/d2. Volatility and rates in percent; optional continuous dividend yield.	Black-Scholes price of a European call or put option, plus d1/d2. Volatility and rates in percent; optional continuous dividend yield.	Not declared	Yes	Yes	No
`bond-duration`Macaulay duration (PV-weighted average time of cashflows, in years) and modified duration (price sensitivity to yield).	Macaulay duration (PV-weighted average time of cashflows, in years) and modified duration (price sensitivity to yield).	Not declared	Yes	Yes	No
`bond-price`Price of a coupon bond given a yield: present value of the coupons plus the face at maturity.	Price of a coupon bond given a yield: present value of the coupons plus the face at maturity.	Not declared	Yes	Yes	No
`break-even-units`Break-even volume: fixed costs divided by the per-unit contribution (price - variable cost), plus the revenue at that volume.	Break-even volume: fixed costs divided by the per-unit contribution (price - variable cost), plus the revenue at that volume.	Not declared	Yes	Yes	No
`budget-50-30-20`The 50/30/20 budget split of monthly income into needs, wants, and savings.	The 50/30/20 budget split of monthly income into needs, wants, and savings.	Not declared	Yes	Yes	No
`cagr`Compound annual growth rate between two values over a number of years. Returns a decimal (0.07 means 7%).	Compound annual growth rate between two values over a number of years. Returns a decimal (0.07 means 7%).	Not declared	Yes	Yes	No
`cap-rate`Capitalization rate: net operating income as a percent of property value.	Capitalization rate: net operating income as a percent of property value.	Not declared	Yes	Yes	No
`cash-on-cash`Cash-on-cash return: annual pre-tax cash flow as a percent of the cash invested.	Cash-on-cash return: annual pre-tax cash flow as a percent of the cash invested.	Not declared	Yes	Yes	No
`coast-fire`Coast FIRE: whether the current nest egg, left to grow untouched to retirement, already reaches the FIRE target. Returns the target, the projected balance, whether it coasts, and any shortfall.	Coast FIRE: whether the current nest egg, left to grow untouched to retirement, already reaches the FIRE target. Returns the target, the projected balance, whether it coasts, and any shortfall.	Not declared	Yes	Yes	No
`compound-interest`Compound growth at any frequency, with an optional contribution each period (paid at period end). Generalizes future-value (periodsPerYear 1) and contributions (periodsPerYear 12).	Compound growth at any frequency, with an optional contribution each period (paid at period end). Generalizes future-value (periodsPerYear 1) and contributions (periodsPerYear 12).	Not declared	Yes	Yes	No
`contribution-margin`Contribution margin per unit and as a percent of price.	Contribution margin per unit and as a percent of price.	Not declared	Yes	Yes	No
`contributions`Future value of a fixed monthly contribution, optionally stepping up each year.	Future value of a fixed monthly contribution, optionally stepping up each year.	Not declared	Yes	Yes	No
`convexity`Bond convexity (years^2): the curvature of price with respect to yield, used alongside duration.	Bond convexity (years^2): the curvature of price with respect to yield, used alongside duration.	Not declared	Yes	Yes	No
`credit-card-payoff`Months to clear a credit-card balance at a fixed monthly payment, plus interest paid. Null when the payment can't cover the first month's interest.	Months to clear a credit-card balance at a fixed monthly payment, plus interest paid. Null when the payment can't cover the first month's interest.	Not declared	Yes	Yes	No
`current-ratio`Current ratio: current assets over current liabilities.	Current ratio: current assets over current liabilities.	Not declared	Yes	Yes	No
`current-yield`Current yield: the annual coupon as a percent of the bond's current price.	Current yield: the annual coupon as a percent of the bond's current price.	Not declared	Yes	Yes	No
`de-abgeltungsteuer`German flat tax on capital income (Abgeltungsteuer, §32d EStG) for tax years 2023-2026 with the year's Sparerpauschbetrag built in. 25% above the allowance, Soli 5.5% on top (no Freigrenze for capital income), and with church tax the statutory reduced rate (e.g. 24.45% at 9%) plus the church tax itself.	German flat tax on capital income (Abgeltungsteuer, §32d EStG) for tax years 2023-2026 with the year's Sparerpauschbetrag built in. 25% above the allowance, Soli 5.5% on top (no Freigrenze for capital income), and with church tax the statutory reduced rate (e.g. 24.45% at 9%) plus the church tax itself.	Not declared	Yes	Yes	No
`de-gross-to-net`German net (Netto) salary from gross (Brutto). No tax tables are baked in: look up the current year's statutory figures and pass them in. Income tax (Lohnsteuer) and Soli are amounts; church tax is a percent of the income tax; the four employee social rates and the two contribution ceilings are inputs. Use consistent units (e.g. all annual).	German net (Netto) salary from gross (Brutto). No tax tables are baked in: look up the current year's statutory figures and pass them in. Income tax (Lohnsteuer) and Soli are amounts; church tax is a percent of the income tax; the four employee social rates and the two contribution ceilings are inputs. Use consistent units (e.g. all annual).	Not declared	Yes	Yes	No
`de-kindergeld`German child benefit (Kindergeld) for 2023-2026: the year's flat monthly amount per child (uniform since 2023), as monthly and annual totals.	German child benefit (Kindergeld) for 2023-2026: the year's flat monthly amount per child (uniform since 2023), as monthly and annual totals.	Not declared	Yes	Yes	No
`de-midijob`German Midijob / Uebergangsbereich (paragraph 20 Abs. 2a SGB IV) for 2023-2026: classifies a monthly pay as Minijob / Midijob / regular against the year's thresholds and, inside the Midijob band, computes the reduced contribution bases (Faktor F from the year's rates) and the employee vs employer social-insurance split.	German Midijob / Uebergangsbereich (paragraph 20 Abs. 2a SGB IV) for 2023-2026: classifies a monthly pay as Minijob / Midijob / regular against the year's thresholds and, inside the Midijob band, computes the reduced contribution bases (Faktor F from the year's rates) and the employee vs employer social-insurance split.	Not declared	Yes	Yes	No
`de-net-salary`Exact German net (Netto) salary from annual gross (Brutto) for tax years 2023-2026. Income tax and Soli follow the official BMF Programmablaufplan for the year (to the euro; 2024 uses the retroactive December tariff), church tax comes from the PAP's Kirchensteuer base, and employee social insurance uses that year's ceilings and rates (KV Zusatzbeitrag defaults to the year's average). Earlier years are rejected - use de-gross-to-net with self-supplied figures instead.	Exact German net (Netto) salary from annual gross (Brutto) for tax years 2023-2026. Income tax and Soli follow the official BMF Programmablaufplan for the year (to the euro; 2024 uses the retroactive December tariff), church tax comes from the PAP's Kirchensteuer base, and employee social insurance uses that year's ceilings and rates (KV Zusatzbeitrag defaults to the year's average). Earlier years are rejected - use de-gross-to-net with self-supplied figures instead.	Not declared	Yes	Yes	No
`de-rentenpunkte`German pension points (Entgeltpunkte, paragraph 63 SGB VI) for 2023-2026: points earned from an annual gross via the year's Durchschnittsentgelt (capped at the contribution ceiling), the aktueller Rentenwert for both halves of the year, and optionally the gross monthly state pension for a total point count.	German pension points (Entgeltpunkte, paragraph 63 SGB VI) for 2023-2026: points earned from an annual gross via the year's Durchschnittsentgelt (capped at the contribution ceiling), the aktueller Rentenwert for both halves of the year, and optionally the gross monthly state pension for a total point count.	Not declared	Yes	Yes	No
`debt-payoff`Multi-debt payoff plan under a fixed monthly budget. method 'avalanche' (highest rate first) minimizes interest; 'snowball' (smallest balance first) clears accounts soonest. Returns months, total interest, and payoff order; flags insolvent budgets.	Multi-debt payoff plan under a fixed monthly budget. method 'avalanche' (highest rate first) minimizes interest; 'snowball' (smallest balance first) clears accounts soonest. Returns months, total interest, and payoff order; flags insolvent budgets.	Not declared	Yes	Yes	No
`declining-balance-depreciation`Declining-balance depreciation: a fixed percent of the reducing book value, for a given year. Returns that year's depreciation and the remaining book value.	Declining-balance depreciation: a fixed percent of the reducing book value, for a given year. Returns that year's depreciation and the remaining book value.	Not declared	Yes	Yes	No
`depreciate`Value after compounding down (or up) at a yearly percentage rate over a number of years. This is the method the app uses for long-term assets.	Value after compounding down (or up) at a yearly percentage rate over a number of years. This is the method the app uses for long-term assets.	Not declared	Yes	Yes	No
`discount`A single percentage discount: the amount off and the final price.	A single percentage discount: the amount off and the final price.	Not declared	Yes	Yes	No
`discounted-payback`Discounted payback period: like payback-period but each cashflow is discounted at the per-period rate.	Discounted payback period: like payback-period but each cashflow is discounted at the per-period rate.	Not declared	Yes	Yes	No
`dollar-cost-averaging`Dollar-cost averaging: buying a fixed amount each period at the given prices. Returns units accumulated, total invested, average cost, and final value at the last price.	Dollar-cost averaging: buying a fixed amount each period at the given prices. Returns units accumulated, total invested, average cost, and final value at the last price.	Not declared	Yes	Yes	No
`double-declining-depreciation`Double-declining-balance depreciation: 2/usefulYears of the book value each year, not falling below salvage.	Double-declining-balance depreciation: 2/usefulYears of the book value each year, not falling below salvage.	Not declared	Yes	Yes	No
`dscr`Debt service coverage ratio: net operating income divided by annual debt service.	Debt service coverage ratio: net operating income divided by annual debt service.	Not declared	Yes	Yes	No
`dti`Debt-to-income ratio, percent (monthly debt / gross monthly income).	Debt-to-income ratio, percent (monthly debt / gross monthly income).	Not declared	Yes	Yes	No
`effective-rate`Convert a nominal annual rate to the effective annual rate (APY) for a compounding frequency, or with toNominal recover the nominal rate from an APY.	Convert a nominal annual rate to the effective annual rate (APY) for a compounding frequency, or with toNominal recover the nominal rate from an APY.	Not declared	Yes	Yes	No
`emergency-fund`Months of runway: liquid savings divided by monthly expenses.	Months of runway: liquid savings divided by monthly expenses.	Not declared	Yes	Yes	No
`fee-drag`Effect of an annual fee: the compounded balance at the gross rate vs net of the fee, and the amount lost to fees.	Effect of an annual fee: the compounded balance at the gross rate vs net of the fee, and the amount lost to fees.	Not declared	Yes	Yes	No
`fire-number`FIRE target nest egg from annual spend and a safe withdrawal rate (default 4%), plus the gap from today and the years to reach it given optional savings and growth. No advice.	FIRE target nest egg from annual spend and a safe withdrawal rate (default 4%), plus the gap from today and the years to reach it given optional savings and growth. No advice.	Not declared	Yes	Yes	No
`future-value`Future value of a single lump sum compounded annually.	Future value of a single lump sum compounded annually.	Not declared	Yes	Yes	No
`fx-convert`Convert an amount using a rate supplied by the caller (units of target currency per unit of source). No rate is ever looked up.	Convert an amount using a rate supplied by the caller (units of target currency per unit of source). No rate is ever looked up.	Not declared	Yes	Yes	No
`gross-rent-multiplier`Gross rent multiplier: price divided by gross annual rent.	Gross rent multiplier: price divided by gross annual rent.	Not declared	Yes	Yes	No
`holding-period-return`Holding-period return: (income + capital gain) / starting value, in percent.	Holding-period return: (income + capital gain) / starting value, in percent.	Not declared	Yes	Yes	No
`hourly-to-salary`Annualize an hourly rate (and the monthly equivalent).	Annualize an hourly rate (and the monthly equivalent).	Not declared	Yes	Yes	No
`inflation-adjust`Convert a nominal amount to today's purchasing power (real), or with toNominal inflate a real amount forward, at a given annual inflation rate.	Convert a nominal amount to today's purchasing power (real), or with toNominal inflate a real amount forward, at a given annual inflation rate.	Not declared	Yes	Yes	No
`interest-only-payment`Interest-only monthly payment on a balance.	Interest-only monthly payment on a balance.	Not declared	Yes	Yes	No
`intrinsic-time-value`Split an option premium into intrinsic value (in-the-money amount) and time value.	Split an option premium into intrinsic value (in-the-money amount) and time value.	Not declared	Yes	Yes	No
`irr`Internal rate of return: the per-period rate that zeroes the NPV of a cashflow series. Returns a percent, or null when the series never crosses zero.	Internal rate of return: the per-period rate that zeroes the NPV of a cashflow series. Returns a percent, or null when the series never crosses zero.	Not declared	Yes	Yes	No
`loan-apr`Effective APR including upfront fees: the note-rate payment priced against the net proceeds (amount - fees). Annual percent.	Effective APR including upfront fees: the note-rate payment priced against the net proceeds (amount - fees). Annual percent.	Not declared	Yes	Yes	No
`loan-payoff`Time and interest saved by paying a fixed extra amount every month on a loan, versus the baseline schedule.	Time and interest saved by paying a fixed extra amount every month on a loan, versus the baseline schedule.	Not declared	Yes	Yes	No
`ltv`Loan-to-value ratio, percent (loan / property value).	Loan-to-value ratio, percent (loan / property value).	Not declared	Yes	Yes	No
`margin-markup`Convert between margin and markup. Supply any one of cost/price plus one of marginPct/markupPct (or both cost and price); returns cost, price, profit, marginPct, and markupPct.	Convert between margin and markup. Supply any one of cost/price plus one of marginPct/markupPct (or both cost and price); returns cost, price, profit, marginPct, and markupPct.	Not declared	Yes	Yes	No
`max-drawdown`Maximum drawdown of a value series: the largest peak-to-trough decline, as a positive percent.	Maximum drawdown of a value series: the largest peak-to-trough decline, as a positive percent.	Not declared	Yes	Yes	No
`mirr`Modified internal rate of return: negatives financed at financeRate, positives reinvested at reinvestRate. Percents in and out.	Modified internal rate of return: negatives financed at financeRate, positives reinvested at reinvestRate. Percents in and out.	Not declared	Yes	Yes	No
`mortgage-affordability`Maximum loan and home price the income supports: the DTI cap on gross monthly income (less existing debts) sets the payment, whose present value at the rate and term is the loan.	Maximum loan and home price the income supports: the DTI cap on gross monthly income (less existing debts) sets the payment, whose present value at the rate and term is the loan.	Not declared	Yes	Yes	No
`net-worth`Net worth: assets minus liabilities.	Net worth: assets minus liabilities.	Not declared	Yes	Yes	No
`noi`Net operating income: gross rental income less vacancy and operating expenses.	Net operating income: gross rental income less vacancy and operating expenses.	Not declared	Yes	Yes	No
`npv`Net present value of a cashflow series (index 0 is today; outflows negative) discounted at a per-period rate.	Net present value of a cashflow series (index 0 is today; outflows negative) discounted at a per-period rate.	Not declared	Yes	Yes	No
`option-breakeven`Break-even underlying price at expiry: strike + premium for a call, strike - premium for a put.	Break-even underlying price at expiry: strike + premium for a call, strike - premium for a put.	Not declared	Yes	Yes	No
`option-greeks`Black-Scholes greeks for a European option: delta, gamma, vega (per 1% vol), theta (per day), rho (per 1% rate).	Black-Scholes greeks for a European option: delta, gamma, vega (per 1% vol), theta (per day), rho (per 1% rate).	Not declared	Yes	Yes	No
`payback-period`Simple payback period: periods until cumulative cashflows recover the initial cost, interpolated within the crossing period. Null if never.	Simple payback period: periods until cumulative cashflows recover the initial cost, interpolated within the crossing period. Null if never.	Not declared	Yes	Yes	No
`percentage-change`Percentage change from one value to another. Null when the starting value is zero.	Percentage change from one value to another. Null when the starting value is zero.	Not declared	Yes	Yes	No
`perpetuity`Present value of a level or growing perpetuity: payment / (rate - growth). Null when growth is not below the rate.	Present value of a level or growing perpetuity: payment / (rate - growth). Null when growth is not below the rate.	Not declared	Yes	Yes	No
`points-breakeven`Mortgage points break-even: the upfront cost to buy down the rate, the monthly payment saving, and the whole months to recoup it.	Mortgage points break-even: the upfront cost to buy down the rate, the monthly payment saving, and the whole months to recoup it.	Not declared	Yes	Yes	No
`portfolio-longevity`How many years a balance lasts while withdrawing from it: the balance grows each year, then the withdrawal (optionally stepping up) is taken. Returns the depletion year, or sustainable=true when it outlasts 200 years.	How many years a balance lasts while withdrawing from it: the balance grows each year, then the withdrawal (optionally stepping up) is taken. Returns the depletion year, or sustainable=true when it outlasts 200 years.	Not declared	Yes	Yes	No
`present-value`Present value of a single future amount discounted annually. The inverse of future-value.	Present value of a single future amount discounted annually. The inverse of future-value.	Not declared	Yes	Yes	No
`put-call-parity`Put-call parity: given one option price, returns both. Provide call or put, plus spot, strike, years, and the rate.	Put-call parity: given one option price, returns both. Provide call or put, plus spot, strike, years, and the rate.	Not declared	Yes	Yes	No
`quick-ratio`Quick (acid-test) ratio: (current assets - inventory) over current liabilities.	Quick (acid-test) ratio: (current assets - inventory) over current liabilities.	Not declared	Yes	Yes	No
`real-return`Real (inflation-adjusted) return from a nominal rate via the Fisher relation: (1+nominal)/(1+inflation) - 1.	Real (inflation-adjusted) return from a nominal rate via the Fisher relation: (1+nominal)/(1+inflation) - 1.	Not declared	Yes	Yes	No
`refi-breakeven`Refinance break-even: monthly saving, whole months to recoup closing costs, and (if remainingMonths given) the net saving over the remaining term.	Refinance break-even: monthly saving, whole months to recoup closing costs, and (if remainingMonths given) the net saving over the remaining term.	Not declared	Yes	Yes	No
`required-contribution`Inverse of contributions: the fixed monthly amount needed to reach a target future value over a number of months, given an optional starting balance.	Inverse of contributions: the fixed monthly amount needed to reach a target future value over a number of months, given an optional starting balance.	Not declared	Yes	Yes	No
`required-return`Annual return needed to grow a starting value to a target over a number of years, optionally with a fixed annual contribution. With no contribution this equals CAGR. Returns a percent, or null when unreachable.	Annual return needed to grow a starting value to a target over a number of years, optionally with a fixed annual contribution. With no contribution this equals CAGR. Returns a percent, or null when unreachable.	Not declared	Yes	Yes	No
`return-stats`Mean, sample variance, and sample standard deviation (n-1) of a series of returns. Pass percents to get a percent stdev (volatility).	Mean, sample variance, and sample standard deviation (n-1) of a series of returns. Pass percents to get a percent stdev (volatility).	Not declared	Yes	Yes	No
`roa`Return on assets, percent: net income over total assets.	Return on assets, percent: net income over total assets.	Not declared	Yes	Yes	No
`roe`Return on equity, percent: net income over shareholders' equity.	Return on equity, percent: net income over shareholders' equity.	Not declared	Yes	Yes	No
`roi`Return on investment: total percent gain, plus the annualized rate when a holding period in years is given.	Return on investment: total percent gain, plus the annualized rate when a holding period in years is given.	Not declared	Yes	Yes	No
`rule-of-72`Years to double: the rule-of-72 estimate (72/rate) and the exact figure (ln2 / ln(1+rate)).	Years to double: the rule-of-72 estimate (72/rate) and the exact figure (ln2 / ln(1+rate)).	Not declared	Yes	Yes	No
`salary-to-hourly`Hourly rate implied by an annual salary.	Hourly rate implied by an annual salary.	Not declared	Yes	Yes	No
`savings-rate`Fraction of income saved (savings divided by income). Returns a decimal.	Fraction of income saved (savings divided by income). Returns a decimal.	Not declared	Yes	Yes	No
`sharpe-ratio`Sharpe ratio: excess mean return per unit of volatility, (mean - riskFree) / stdev. Null when volatility is undefined or zero.	Sharpe ratio: excess mean return per unit of volatility, (mean - riskFree) / stdev. Null when volatility is undefined or zero.	Not declared	Yes	Yes	No
`straight-line-depreciation`Straight-line depreciation: value falling evenly to a salvage value over a useful life.	Straight-line depreciation: value falling evenly to a salvage value over a useful life.	Not declared	Yes	Yes	No
`successive-discounts`Stacked discounts applied in order: the final price and the effective single discount rate.	Stacked discounts applied in order: the final price and the effective single discount rate.	Not declared	Yes	Yes	No
`sum-of-years-digits`Sum-of-the-years'-digits depreciation: the depreciable base weighted toward the early years.	Sum-of-the-years'-digits depreciation: the depreciable base weighted toward the early years.	Not declared	Yes	Yes	No
`tax-equivalent-yield`Tax-equivalent yield: the taxable yield that matches a tax-free (e.g. muni) yield. Percents in and out.	Tax-equivalent yield: the taxable yield that matches a tax-free (e.g. muni) yield. Percents in and out.	Not declared	Yes	Yes	No
`tax-from-brackets`Progressive tax from caller-supplied brackets. No jurisdiction, year, or rates are baked in: pass the brackets yourself. Returns total tax, effective rate, and marginal rate.	Progressive tax from caller-supplied brackets. No jurisdiction, year, or rates are baked in: pass the brackets yourself. Returns total tax, effective rate, and marginal rate.	Not declared	Yes	Yes	No
`tip-split`Tip and split: the tip amount, the total, and the per-person share.	Tip and split: the tip amount, the total, and the per-person share.	Not declared	Yes	Yes	No
`unit-price`Unit price: price divided by quantity (for comparing pack sizes). Null when quantity is zero.	Unit price: price divided by quantity (for comparing pack sizes). Null when quantity is zero.	Not declared	Yes	Yes	No
`units-of-production-depreciation`Units-of-production depreciation: the depreciable base spread over total expected units, charged by the units used this period.	Units-of-production depreciation: the depreciable base spread over total expected units, charged by the units used this period.	Not declared	Yes	Yes	No
`vat`Value-added tax (MwSt/USt, sales tax) on a price. By default adds the tax to a net price; with inclusive=true treats the amount as gross and extracts the tax. The rate is always an input (19 or 7 for Germany, etc.).	Value-added tax (MwSt/USt, sales tax) on a price. By default adds the tax to a net price; with inclusive=true treats the amount as gross and extracts the tax. The rate is always an input (19 or 7 for Germany, etc.).	Not declared	Yes	Yes	No
`wacc`Weighted average cost of capital: equity and after-tax debt weighted by the capital structure. Percents in and out.	Weighted average cost of capital: equity and after-tax debt weighted by the capital structure. Percents in and out.	Not declared	Yes	Yes	No
`xirr`Date-aware internal rate of return: the annual rate that zeroes the XNPV of irregular dated cashflows. Null if no rate fits.	Date-aware internal rate of return: the annual rate that zeroes the XNPV of irregular dated cashflows. Null if no rate fits.	Not declared	Yes	Yes	No
`xnpv`Date-aware net present value: each amount discounted by its fractional years (act/365) from the first cashflow's date. Annual rate in percent.	Date-aware net present value: each amount discounted by its fractional years (act/365) from the first cashflow's date. Annual rate in percent.	Not declared	Yes	Yes	No
`yield-to-maturity`Bond yield to maturity: the nominal annual yield that prices a bond at the given price, with periodic coupons and face returned at maturity. Solved numerically. Returns a percent, or null.	Bond yield to maturity: the nominal annual yield that prices a bond at the given price, with periodic coupons and face returned at maturity. Solved numerically. Returns a percent, or null.	Not declared	Yes	Yes	No
`zero-coupon-price`Price of a zero-coupon bond: face value discounted to today at the yield.	Price of a zero-coupon bond: face value discounted to today at the yield.	Not declared	Yes	Yes	No

Details

Registry status: Active
Published: Jul 2, 2026
Updated: Jul 2, 2026
Website: Not given
Repository: https://github.com/VladimirWrites/nestegg.money⁠ (opens in a new tab)
Categories (suggested): Finance and paymentsSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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