Finance
Calculateurs de prêts, d'épargne, d'investissements et d'intérêts.
Calculators (28)
Calculateur de Prêt Immobilier
Calculez mensualités, coût des intérêts, taxes foncières et tableau d'amortissement complet.
Calculateur d'Intérêts Composés
Simulez l'accroissement patrimonial avec versements réguliers et ajustement de l'inflation.
Calculateur de Crédit
Calculez mensualités, coût du crédit et économies d'intérêts générées par des remboursements anticipés.
Calculateur d'Investissement
Projetez les rendements de portefeuille, le réinvestissement des dividendes et la croissance du capital.
Calculateur de Retraite
Planifiez votre épargne retraite, objectifs FIRE et taux de retrait sécurisé pour votre avenir.
Calculateur de Crédit Auto
Calculez le coût réel d'un prêt automobile avec reprise de véhicule, apport et frais d'immatriculation.
Calculateur de Salaire
Convertissez salaire annuel, mensuel et taux horaire avec heures de travail ajustables.
Calculateur d'Impôt sur le Revenu
Calculez impôt brut, taux effectif et taux marginal via les tranches de barème progressif.
Calculateur d'Apport Personnel
Planifiez votre apport personnel pour l'achat immobilier et optimisez votre ratio de financement.
Calculateur de Rachat de Crédit
Calculez le seuil de rentabilité et les économies d'intérêts réalisables lors d'un refinancement immobilier.
VAT Calculator
Calculate Value-Added Tax (VAT), add tax to net amounts, or reverse-calculate pre-tax net prices.
Inflation Impact Calculator
Calculate how compounding inflation erodes your cash purchasing power and compute the future cost of today goods.
Calculateur d'Épargne Retraite 401(k)
Calculez le capital retraite 401(k), les abondements employeur, les intérêts composés et la rente mensuelle.
Calculateur de Budget 50/30/20
Répartissez vos revenus nets en Besoins (50%), Envies (30%) et Épargne (20%).
Calculateur de Rente Viagère
Calculez l'accumulation du capital ou les versements périodiques de rente garantie.
Calculateur TAEG / APR
Calculez le Taux Annuel Effectif Global (TAEG) en incluant les frais de dossier et frais de clôture.
Calculateur de Rendement Obligataire
Calculez le taux de rendement actuariel (TRA/YTM), le rendement courant et la sensibilité de l'obligation.
Calculateur de Seuil de Rentabilité
Calculez le point mort en volume et en chiffre d'affaires, la marge sur coûts variables et la marge de sécurité.
Calculateur de TCAM (CAGR)
Calculez le Taux de Croissance Annuel Moyen (TCAM/CAGR) et le temps de doublement de capital.
Calculateur d'Impôt sur les Plus-Values
Calculez la fiscalité sur les plus-values mobilières ou immobilières et le montant net d'impôt.
Calculateur de Remboursement de Carte de Crédit
Calculez la durée d'amortissement de la dette de carte bancaire, les intérêts et le piège du paiement minimum.
Calculateur de Désendettement
Comparez les stratégies Avalanche (taux le plus élevé) et Boule de neige (plus petit solde) pour solder vos dettes.
Calculateur DCF (Flux de Trésorerie Actualisés)
Évaluez la valeur intrinsèque d'une entreprise et le cours de son action via l'actualisation des cash-flows.
Calculateur FIRE (Indépendance Financière)
Calculez votre montant FIRE pour prendre votre retraite anticipée grâce au taux de retrait sécurisé.
Calculateur de Valeur Future
Calculez la valeur future capitalisée de vos versements ponctuels et périodiques.
Calculateur de Capacité d'Emprunt Immobilier
Évaluez le prix d'achat maximal de votre résidence en fonction de vos revenus et du taux d'endettement.
Calculateur de Délai de Récupération (Payback)
Calculez le temps nécessaire pour rentabiliser un investissement avec ou sans actualisation des flux.
Calculateur de Pourboire et Partage d'Addition
Calculez le pourboire au restaurant, le montant hors taxes et le partage équitable de la note.
Guides (28)
Mortgage Math & Amortization: Principal, Escrow & Front-Loaded Interest
Regulation Z monthly fixed amortization equation, PITI escrow breakdown, early interest curves, and PMI dropoff thresholds.
Loan Amortization Mechanics: How Extra Principal Slashes Borrowing Costs
TILA Regulation Z compounding formulas, bi-weekly payment acceleration, extra principal debt reduction, and amortization curves.
Auto Loan Financing: Interest Rates, Loan Terms & True Vehicle Cost
Truth in Lending Act auto amortization equations, sales tax trade-in tax credits, dealer doc fees, and the 20/4/10 affordability rule.
The Mechanics of Compound Interest: Exponential Growth & Time Horizons
Discrete exponential compounding equations, APY conversion formulas, ordinary annuity vs annuity due, and Fisher real inflation discounting.
Investment Returns & CAGR: Measuring Dividends, Growth & Risk
Return on Investment (ROI), Compound Annual Growth Rate (CAGR), DRIP dividend reinvestment, and capital gains taxation drag.
Retirement Horizons & The 4% Rule: Safe Withdrawal Rates Demystified
William Bengen Trinity Study safe withdrawal rates, accumulation compounding, sequence of returns risk, and social security optimization.
Gross vs. Net Pay: Converting Hourly, Biweekly, and Annual Earnings
Fair Labor Standards Act 2,080-hour baseline, overtime time-and-a-half calculation, pre-tax 401(k)/HSA benefits, and FICA withholding.
How Progressive Tax Brackets Work: Marginal Rates vs. Effective Tax
IRS 2024 progressive marginal brackets, standard vs itemized deductions, FICA payroll withholdings, and effective tax rates.
Down Payments and LTV: How Equity Eliminates Private Mortgage Insurance
Fannie Mae / FHA loan-to-value (LTV) risk tiers, Private Mortgage Insurance (PMI) cost elimination at 20% down, and savings timeline modeling.
Mortgage Refinancing Break-Even: Balancing Closing Costs Against Monthly Savings
Rate-and-term vs cash-out refinancing, closing cost break-even horizon payback formulas, and avoiding reset loan term pitfalls.
Value Added Tax (VAT) Mechanics: Forward Calculation, Gross-to-Net Extraction & Compliance
Tax fraction derivations, reverse VAT extraction algebra, global rate tiers, and invoice rounding protocols.
Purchasing Power Degradation: CPI Modeling, The Rule of 72 & Asset Compounding
Mathematical decay of real capital under persistent inflation, asset class resilience, and historical CPI indices.
The Mechanics of 401(k) Wealth Accumulation: Employer Matches, Compounding & IRS Limits
Employer match capture, mid-year compounding iteration, pre-tax vs. Roth arbitrage, and 4% safe withdrawal rate decumulation.
The 50/30/20 Budgeting Rule: Structural Solvency, Needs vs. Wants & Capital Formation
Macro-allocation frameworks, separating non-negotiable needs from discretionary wants, and high-cost urban 60/20/20 modifications.
Annuity Valuation Mechanics: Discount Rates, Ordinary Annuities vs. Annuities Due & Mortality Pooling
Time value of money derivations, geometric finite sums, fixed decumulation drawdown formulas, and insurance mortality pooling.
Demystifying APR: Prepaid Finance Charges, Regulation Z & Numerical IRR Derivations
Truth in Lending disclosures, separating closing fees from finance charges, and Newton-Raphson internal rate of return root finding.
Bond Pricing Dynamics: Yield to Maturity, Convexity & The Term Structure of Interest Rates
Current yield vs. YTM, Macaulay duration, modified duration price sensitivity, and high-order positive convexity corrections.
Cost-Volume-Profit Analysis: Contribution Margins, Operating Leverage & Break-Even Strategy
Separating fixed overhead from variable costs, unit contribution margin ratios, margin of safety buffers, and operating leverage.
Compound Annual Growth Rate: Geometric Means, Volatility Drag & Portfolio Benchmarking
Why arithmetic averages fail in volatile asset classes, mathematical derivations of geometric means, and Rule of 72 doubling times.
The Taxation of Capital Gains: Long-Term Arbitrage, Basis Stepping & Section 121 Exclusions
Statutory holding period classifications, 2024 federal tax brackets, Net Investment Income Tax (NIIT), and primary residence tax shelters.
The Mathematics of Revolving Debt: Minimum Payment Traps, Daily Compounding & Amortization
Average daily balance accrual, CARD Act geometric decay traps, logarithmic amortization solutions, and negative amortization guards.
Algorithmic Debt Elimination: Avalanche vs. Snowball Optimization & Cash-Flow Rollover
Comparing mathematical interest minimization against behavioral momentum wins, cash flow rollover compounding, and liquidity buffers.
Intrinsic Valuation Mechanics: Discounted Cash Flows, WACC & Terminal Horizon Modeling
Free cash flow to firm discounting, Gordon Growth perpetual terminal value, CAPM cost of equity, and Benjamin Graham margins of safety.
The Mechanics of Financial Independence: Safe Withdrawal Rates, Sequence of Returns & Trinity Derivations
Why savings rate dictates retirement velocity, the Trinity Study 4% rule, sequence-of-returns risk mitigation, and early FIRE archetypes.
The Time Value of Money: Future Value Formulations, Compounding Frequencies & Geometric Series
Temporal preference principles, finite geometric annuity compounding, the continuous limit via Euler constant e, and the Fisher inflation effect.
Home Affordability & Mortgage Underwriting: Front-End/Back-End DTI, PITI & Capital Reserves
Fannie Mae conforming 28/36 qualifying ratios, true cost of ownership PITI breakdown, PMI cancellation, and interest rate purchasing power shocks.
Capital Budgeting & Payback Analysis: Simple Payback, Discounted Cash Flows & Liquidity Risk
Evaluating corporate capital velocity and liquidity risk, simple vs. discounted payback periods, and avoiding the post-payback blind spot.
The Economics & Etiquette of Tipping: Gratuity Percentages, Tax Compounding & Bill Splitting
Pre-tax tip hospitality standards, automated service charges, and equitable group restaurant settlement.
Articles (3)
Understanding Mortgage Amortization & The Front-Loaded Interest Curve
Why your initial mortgage payments consist almost entirely of interest, and how accelerated principal prepayments reduce total borrowing costs.
The Mathematics Behind Compound Interest: How Money Multiplies
The exponential mathematics of compounding returns, the Rule of 72, and the financial impact of starting investments early.
Understanding Progressive Tax Brackets: Why Earning More Never Makes You Take Home Less
Deconstruct the pervasive myth that a pay raise can reduce take-home pay. Master marginal vs. effective tax rates, bracket buckets, and deductions.
Tous les calculateurs de Finance
Calculateur de Prêt Immobilier
Calculez mensualités, coût des intérêts, taxes foncières et tableau d'amortissement complet.
Calculateur d'Intérêts Composés
Simulez l'accroissement patrimonial avec versements réguliers et ajustement de l'inflation.
Calculateur de Crédit
Calculez mensualités, coût du crédit et économies d'intérêts générées par des remboursements anticipés.
Calculateur d'Investissement
Projetez les rendements de portefeuille, le réinvestissement des dividendes et la croissance du capital.
Calculateur de Retraite
Planifiez votre épargne retraite, objectifs FIRE et taux de retrait sécurisé pour votre avenir.
Calculateur de Crédit Auto
Calculez le coût réel d'un prêt automobile avec reprise de véhicule, apport et frais d'immatriculation.
Calculateur de Salaire
Convertissez salaire annuel, mensuel et taux horaire avec heures de travail ajustables.
Calculateur d'Impôt sur le Revenu
Calculez impôt brut, taux effectif et taux marginal via les tranches de barème progressif.
Calculateur d'Apport Personnel
Planifiez votre apport personnel pour l'achat immobilier et optimisez votre ratio de financement.
Calculateur de Rachat de Crédit
Calculez le seuil de rentabilité et les économies d'intérêts réalisables lors d'un refinancement immobilier.
VAT Calculator
Calculate Value-Added Tax (VAT), add tax to net amounts, or reverse-calculate pre-tax net prices.
Inflation Impact Calculator
Calculate how compounding inflation erodes your cash purchasing power and compute the future cost of today goods.
Calculateur d'Épargne Retraite 401(k)
Calculez le capital retraite 401(k), les abondements employeur, les intérêts composés et la rente mensuelle.
Calculateur de Budget 50/30/20
Répartissez vos revenus nets en Besoins (50%), Envies (30%) et Épargne (20%).
Calculateur de Rente Viagère
Calculez l'accumulation du capital ou les versements périodiques de rente garantie.
Calculateur TAEG / APR
Calculez le Taux Annuel Effectif Global (TAEG) en incluant les frais de dossier et frais de clôture.
Calculateur de Rendement Obligataire
Calculez le taux de rendement actuariel (TRA/YTM), le rendement courant et la sensibilité de l'obligation.
Calculateur de Seuil de Rentabilité
Calculez le point mort en volume et en chiffre d'affaires, la marge sur coûts variables et la marge de sécurité.
Calculateur de TCAM (CAGR)
Calculez le Taux de Croissance Annuel Moyen (TCAM/CAGR) et le temps de doublement de capital.
Calculateur d'Impôt sur les Plus-Values
Calculez la fiscalité sur les plus-values mobilières ou immobilières et le montant net d'impôt.
Calculateur de Remboursement de Carte de Crédit
Calculez la durée d'amortissement de la dette de carte bancaire, les intérêts et le piège du paiement minimum.
Calculateur de Désendettement
Comparez les stratégies Avalanche (taux le plus élevé) et Boule de neige (plus petit solde) pour solder vos dettes.
Calculateur DCF (Flux de Trésorerie Actualisés)
Évaluez la valeur intrinsèque d'une entreprise et le cours de son action via l'actualisation des cash-flows.
Calculateur FIRE (Indépendance Financière)
Calculez votre montant FIRE pour prendre votre retraite anticipée grâce au taux de retrait sécurisé.
Calculateur de Valeur Future
Calculez la valeur future capitalisée de vos versements ponctuels et périodiques.
Calculateur de Capacité d'Emprunt Immobilier
Évaluez le prix d'achat maximal de votre résidence en fonction de vos revenus et du taux d'endettement.
Calculateur de Délai de Récupération (Payback)
Calculez le temps nécessaire pour rentabiliser un investissement avec ou sans actualisation des flux.
Calculateur de Pourboire et Partage d'Addition
Calculez le pourboire au restaurant, le montant hors taxes et le partage équitable de la note.
Authoritative Guides for Finance
Mortgage Math & Amortization: Principal, Escrow & Front-Loaded Interest
Regulation Z monthly fixed amortization equation, PITI escrow breakdown, early interest curves, and PMI dropoff thresholds.
Loan Amortization Mechanics: How Extra Principal Slashes Borrowing Costs
TILA Regulation Z compounding formulas, bi-weekly payment acceleration, extra principal debt reduction, and amortization curves.
Auto Loan Financing: Interest Rates, Loan Terms & True Vehicle Cost
Truth in Lending Act auto amortization equations, sales tax trade-in tax credits, dealer doc fees, and the 20/4/10 affordability rule.
The Mechanics of Compound Interest: Exponential Growth & Time Horizons
Discrete exponential compounding equations, APY conversion formulas, ordinary annuity vs annuity due, and Fisher real inflation discounting.
Investment Returns & CAGR: Measuring Dividends, Growth & Risk
Return on Investment (ROI), Compound Annual Growth Rate (CAGR), DRIP dividend reinvestment, and capital gains taxation drag.
Retirement Horizons & The 4% Rule: Safe Withdrawal Rates Demystified
William Bengen Trinity Study safe withdrawal rates, accumulation compounding, sequence of returns risk, and social security optimization.
Gross vs. Net Pay: Converting Hourly, Biweekly, and Annual Earnings
Fair Labor Standards Act 2,080-hour baseline, overtime time-and-a-half calculation, pre-tax 401(k)/HSA benefits, and FICA withholding.
How Progressive Tax Brackets Work: Marginal Rates vs. Effective Tax
IRS 2024 progressive marginal brackets, standard vs itemized deductions, FICA payroll withholdings, and effective tax rates.
Down Payments and LTV: How Equity Eliminates Private Mortgage Insurance
Fannie Mae / FHA loan-to-value (LTV) risk tiers, Private Mortgage Insurance (PMI) cost elimination at 20% down, and savings timeline modeling.
Mortgage Refinancing Break-Even: Balancing Closing Costs Against Monthly Savings
Rate-and-term vs cash-out refinancing, closing cost break-even horizon payback formulas, and avoiding reset loan term pitfalls.
Value Added Tax (VAT) Mechanics: Forward Calculation, Gross-to-Net Extraction & Compliance
Tax fraction derivations, reverse VAT extraction algebra, global rate tiers, and invoice rounding protocols.
Purchasing Power Degradation: CPI Modeling, The Rule of 72 & Asset Compounding
Mathematical decay of real capital under persistent inflation, asset class resilience, and historical CPI indices.
The Mechanics of 401(k) Wealth Accumulation: Employer Matches, Compounding & IRS Limits
Employer match capture, mid-year compounding iteration, pre-tax vs. Roth arbitrage, and 4% safe withdrawal rate decumulation.
The 50/30/20 Budgeting Rule: Structural Solvency, Needs vs. Wants & Capital Formation
Macro-allocation frameworks, separating non-negotiable needs from discretionary wants, and high-cost urban 60/20/20 modifications.
Annuity Valuation Mechanics: Discount Rates, Ordinary Annuities vs. Annuities Due & Mortality Pooling
Time value of money derivations, geometric finite sums, fixed decumulation drawdown formulas, and insurance mortality pooling.
Demystifying APR: Prepaid Finance Charges, Regulation Z & Numerical IRR Derivations
Truth in Lending disclosures, separating closing fees from finance charges, and Newton-Raphson internal rate of return root finding.
Bond Pricing Dynamics: Yield to Maturity, Convexity & The Term Structure of Interest Rates
Current yield vs. YTM, Macaulay duration, modified duration price sensitivity, and high-order positive convexity corrections.
Cost-Volume-Profit Analysis: Contribution Margins, Operating Leverage & Break-Even Strategy
Separating fixed overhead from variable costs, unit contribution margin ratios, margin of safety buffers, and operating leverage.
Compound Annual Growth Rate: Geometric Means, Volatility Drag & Portfolio Benchmarking
Why arithmetic averages fail in volatile asset classes, mathematical derivations of geometric means, and Rule of 72 doubling times.
The Taxation of Capital Gains: Long-Term Arbitrage, Basis Stepping & Section 121 Exclusions
Statutory holding period classifications, 2024 federal tax brackets, Net Investment Income Tax (NIIT), and primary residence tax shelters.
The Mathematics of Revolving Debt: Minimum Payment Traps, Daily Compounding & Amortization
Average daily balance accrual, CARD Act geometric decay traps, logarithmic amortization solutions, and negative amortization guards.
Algorithmic Debt Elimination: Avalanche vs. Snowball Optimization & Cash-Flow Rollover
Comparing mathematical interest minimization against behavioral momentum wins, cash flow rollover compounding, and liquidity buffers.
Intrinsic Valuation Mechanics: Discounted Cash Flows, WACC & Terminal Horizon Modeling
Free cash flow to firm discounting, Gordon Growth perpetual terminal value, CAPM cost of equity, and Benjamin Graham margins of safety.
The Mechanics of Financial Independence: Safe Withdrawal Rates, Sequence of Returns & Trinity Derivations
Why savings rate dictates retirement velocity, the Trinity Study 4% rule, sequence-of-returns risk mitigation, and early FIRE archetypes.
The Time Value of Money: Future Value Formulations, Compounding Frequencies & Geometric Series
Temporal preference principles, finite geometric annuity compounding, the continuous limit via Euler constant e, and the Fisher inflation effect.
Home Affordability & Mortgage Underwriting: Front-End/Back-End DTI, PITI & Capital Reserves
Fannie Mae conforming 28/36 qualifying ratios, true cost of ownership PITI breakdown, PMI cancellation, and interest rate purchasing power shocks.
Capital Budgeting & Payback Analysis: Simple Payback, Discounted Cash Flows & Liquidity Risk
Evaluating corporate capital velocity and liquidity risk, simple vs. discounted payback periods, and avoiding the post-payback blind spot.
The Economics & Etiquette of Tipping: Gratuity Percentages, Tax Compounding & Bill Splitting
Pre-tax tip hospitality standards, automated service charges, and equitable group restaurant settlement.
Editorial Articles for Finance
Understanding Mortgage Amortization & The Front-Loaded Interest Curve
Why your initial mortgage payments consist almost entirely of interest, and how accelerated principal prepayments reduce total borrowing costs.
The Mathematics Behind Compound Interest: How Money Multiplies
The exponential mathematics of compounding returns, the Rule of 72, and the financial impact of starting investments early.
Understanding Progressive Tax Brackets: Why Earning More Never Makes You Take Home Less
Deconstruct the pervasive myth that a pay raise can reduce take-home pay. Master marginal vs. effective tax rates, bracket buckets, and deductions.