Finance

Manage your budget, loans, and taxes.

• Rental Yield Calculator France: Net, After-Tax, LMNP – Enter price, rent, charges, vacancy and loan to get gross, net and after-tax yield and cash flow of a French rental: LMNP, micro-BIC or unfurnished.
• Rent vs Buy Calculator by State: When Buying Wins – Compare a buyer's and a renter's net worth year by year, with US state taxes and PMI or UK stamp duty, deposit and mortgage rate.
• French Income Tax Calculator (impôt sur le revenu) – Enter income, family situation and tax shares to estimate French income tax, with the family quotient and décote.
• Debt Payoff Calculator: Snowball vs Avalanche Compared – Plan paying off several debts with the snowball or avalanche method: debt-free date, interest paid, balance chart and both methods compared side by side.
• Currency Converter with Daily Reference Exchange Rates – Enter an amount and two currencies to convert it at the published reference rate, updated every business day.
• French Inflation Calculator: Purchasing Power Over Time – Pick an amount and two years to see its adjusted value and the cumulative price rise, based on French Insee data.
• Mortgage Calculator: Monthly Payment and Amortization – Enter loan amount, term, rate and insurance to get the monthly payment, the total cost and an amortization chart.
• French Borrowing Power Calculator: Mortgage Capacity (35%) – Enter net income, existing loans, rate and term to see how much you can borrow with a 35% debt-to-income cap.
• French Notary Fees Calculator: Transfer Tax and Costs – Enter the price of a home or plot in France, old or new build, to estimate transfer taxes, notaire fees, the mortgage guarantee and furniture savings.
• Compound Interest Calculator with Monthly Contributions – Enter a starting amount, monthly deposit, rate and duration to see the final balance and the interest earned.
• Savings Goal Calculator: How Much to Save Each Month – Enter your target, current savings, time frame and interest rate to get the monthly deposit you need to reach it.
• French VAT Calculator: Net to Gross and Gross to Net – Enter a net or gross amount and a rate (20%, 10%, 5.5% or 2.1%) to get net, VAT and gross amounts to the cent.
• Percentage Calculator: Percent Of, Share and Change – Work out X% of an amount, what share a number is of a total, or the percentage change between two values.
• Discount Calculator: Price After One or Two Discounts – Enter the list price and one or two stacked discounts to see the final price, the saving and the real discount.
• 401k and Roth IRA Calculator for US Retirement – Project your 401(k) and IRA contributions at 2026 IRS limits, with employer match, through to retirement.
• PEA vs Standard Brokerage (CTO) Tax Optimizer – Model the 5-year French PEA tax exemption (18.6% vs 31.4% flat tax) and frictionless dividend compounding.
• French Mileage Allowance Calculator: Tax Scale and Expenses – French tax scale: allowance by fiscal horsepower, 20% EV bonus, comparison with the 10% flat deduction and a ready-to-copy expense report with tolls and meals.
• US Multistate Tax Calculator for Remote Workers – Apportion income and state tax liabilities across multiple US states (CA, NY, TX, FL) with 'Convenience of the Employer' rule handling.
• US Expat Tax Optimizer (FEIE Form 2555 vs FTC Form 1116) – Compare the Foreign Earned Income Exclusion (up to $132,900 in 2026) against the Foreign Tax Credit to eliminate transatlantic double taxation.
• US 529 College Savings Calculator and Roth IRA Rollover – Model compound tax-free college growth, state tax deductions, and penalty-free rollovers up to $35,000 into a beneficiary's Roth IRA.
• US Estate Tax Calculator: Gift Tax and Lifetime Exemption – Project 40% federal estate taxes with the $15M 2026 exemption and optimize annual gift exclusion tax-free transfers.
• US Qualified Opportunity Zone (QOZ §1400Z-2) Tax Simulator – Model capital gains tax deferral and 100% tax-free fund gains after 10 years of holding in a Qualified Opportunity Fund.
• Home Office Tax Deduction Calculator: Actual Expenses – Calculate deductible housing, electricity, and equipment costs based on home office square footage and teleworking frequency.
• Stripe vs Merchant of Record Fees: Paddle, Lemon Squeezy – Compare direct gateway processing fees and international VAT compliance costs against Merchant of Record platforms based on sales volume.
• Debt-to-Income Ratio Calculator: 35% Cap and Living Budget – Audit mortgage affordability against strict 35% debt caps (including borrower insurance), rent jump, and bank living budget standards.
• Student Loan Repayment Calculator with Grace Period – Work out in euros the monthly payment during your studies (partial or full grace period, interest capitalized yearly), the payment after graduation and the total cost of interest and insurance.
• Prime d'activité Simulator: French In-Work Benefit (CAF) – Estimate your monthly French in-work benefit (Prime d’Activité) according to your net income, family situation, and housing status.
• French PER Retirement Plan Calculator: Tax Savings – Calculate immediate upfront income tax savings, compound interest retirement nest egg, and net after-tax lump sum at retirement.
• US 401k Calculator: Retirement Growth and Employer Match – Project your retirement nest egg with compound interest, employer matching, IRS annual limits, and inflation-adjusted purchasing power.
• Salary Calculator USA: Take-Home Paycheck After Taxes – Calculate your net take-home paycheck after federal income tax brackets, Social Security, Medicare, and state withholding.
• US Car Loan Calculator with Trade-In and Sales Tax – Estimate a US car loan in dollars: monthly payment, total interest, your state sales tax, trade-in equity including any amount still owed, and 36 to 84-month terms compared.
• FIRE Calculator: Financial Independence and the 4% Rule – Calculate your FIRE number, savings rate, years to financial freedom, and Lean, Fat, Coast, and Barista FIRE milestones.
• US Social Security Calculator: Benefits by Claiming Age – Estimate your monthly Social Security check based on claiming age: early at 62 (-30%), FRA at 67 (100%), or delayed at 70 (+24%).
• Auto Loan Calculator: Monthly Car Payment and Interest – Work out a monthly car loan payment in your own currency, with total interest, down payment, trade-in and fees. Sales tax is optional: leave it at 0 where VAT is already in the price.
• US Car Lease Calculator: Payment, Money Factor, Lease vs Buy – US car lease payment with money factor, residual and sales tax. Money factor to APR converter both ways, money factor of an offer, and a lease vs finance comparison over several years.
• RMD Calculator: Required Minimum Distribution for IRA, 401k – Estimate mandatory retirement account withdrawals from Traditional 401(k) and IRAs, tax implications, and avoid the 25% IRS penalty.
• LOA, LLD or Car Loan: Real Cost in France and Europe – Compare the net cost in euros of a LOA (lease with purchase option) or LLD (long-term rental) with a standard car loan in France and Europe: deposit, interest, buyback price and resale value.
• Double Discount & Cumulative Promo Calculator – Calculate stacked successive discounts (e.g. 30% sale + extra 20% coupon code + cashback) avoiding common mathematical traps.
• Corporate Tax, Dividend vs Salary Remuneration Optimizer – Model executive compensation tradeoffs between payroll (pension, healthcare) and dividends (flat tax) to maximize net earnings.
• Couple Bill Split Calculator: 50/50 or by Income Share – Split rent, groceries and bills with your partner: 50/50, in proportion to income or with equal money left over, showing what each of you pays and keeps.
• Argentina Inflation Calculator: Adjust Pesos by INDEC CPI – Adjust a peso amount in Argentina between two months with INDEC's national CPI: cumulative inflation, monthly average and lost purchasing power.
• Simulador crédito UVA: Argentina UVA mortgage calculator – Simulate a UVA mortgage in Argentina: payment in UVA and pesos, live BCRA UVA value, payment-to-income ratio and a projection under your inflation guess.
• Brazil CDI x poupança calculator: which pays more? – Compare CDI x poupança in Brazil with today's Banco Central rates: a CDB or LCI/LCA at X% of CDI after income tax and IOF against the tax-free poupança.
• Colombia UVT to pesos converter: UVT 2026 (COP 52,374) – Convert UVT to pesos and back in Colombia with the official DIAN value for 2020 to 2026 and the rounding rule of article 868 of the Estatuto Tributario.
• German Mortgage Calculator: Tilgungsrechner and Restschuld – Home loan in Germany: monthly payment from Sollzins and Tilgung, repayment plan, Restschuld at the end of the Zinsbindung, extra repayments.
• Livret A Interest Calculator (France): Fortnight Rule – Calculate interest on a Livret A, LDDS or LEP in France with the fortnight (quinzaine) rule: 2026 rates, dated deposits and best dates to move money.
• Simulador hipoteca Euribor: variable mortgage in Spain – Simulate a variable-rate hipoteca in Spain: Euribor + spread, yearly or 6-monthly reviews, payment and interest per period under your Euribor scenario.
• Morocco CNSS pension calculator (old-age pension) – Estimate your CNSS retirement pension in Morocco from your declared days (1,320 minimum) and average pay, under the 2025 rules of Law No. 02.24.
• UMA to pesos calculator: Mexico UMA 2026 (117.31 MXN) – Mexico: convert UMA to pesos and back using the daily, monthly or annual value, with INEGI figures from 2016 to 2026 and the 2026 rate.
• 50 30 20 budget planner: envelopes and money left – Split your monthly take-home pay with the 50/30/20 rule, edit the percentages, add envelopes and see how much is left to budget, all in one currency.
• Dividend calculator: yield, income and DRIP growth – Work out dividend yield, annual and monthly income, what reinvesting does over N years, and the net amount after the tax rates you enter yourself.