Finanzen
Rechner für Kredite, Ersparnisse, Investitionen und Zinsen.
Calculators (28)
Hypothekenrechner
Berechnen Sie monatliche Tilgungsraten, Zinskosten, Grundsteuern und vollständige Tilgungspläne.
Zinseszinsrechner
Simulieren Sie Vermögenswachstum mit Zinseszins, regelmäßigen Einzahlungen und Inflationsbereinigung.
Kreditrechner
Berechnen Sie Raten für Privatkredite, Zinskosten und Ersparnisse durch Sondertilgungen.
Investmentrechner
Prognostizieren Sie Portfoliorenditen, Reinvestition von Dividenden und langfristiges Kapitalwachstum.
Rentenrechner
Planen Sie Ihre Altersvorsorge, FIRE-Ziele und sichere Entnahmeraten für finanzielle Freiheit.
Autokreditrechner
Berechnen Sie Autofinanzierungen mit Inzahlungnahme, Anzahlung, Mehrwertsteuer und Zulassungskosten.
Gehaltsrechner
Rechnen Sie Jahresgehalt, Monatslohn und Stundensätze transparent ineinander um.
Einkommensteuerrechner
Berechnen Sie effektive und marginale Steuersätze durch progressive Steuertabellen.
Anzahlungsrechner
Ermitteln Sie Sparpläne für Immobilienanzahlungen, LTV-Verhältnisse und PMI-Schwellen.
Umschuldungsrechner
Berechnen Sie Break-Even-Punkte, Zinseinsparungen und monatliche Entlastung durch Baufinanzierungs-Umschuldung.
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.
401(k)-Wachstumsrechner
Berechnen Sie das 401(k)-Guthaben im Ruhestand, Arbeitgeberbeiträge, Zinseszinsen und monatliches Ruhestandseinkommen.
50/30/20 Budget-Rechner
Teilen Sie Ihr Nettoeinkommen in Grundbedürfnisse (50%), Wünsche (30%) und Ersparnisse (20%) auf.
Annuitätenrechner
Berechnen Sie zukünftige Rentenansprüche oder garantierte feste Entzahlungsraten im Ruhestand.
Effektivzins-Rechner (APR)
Ermitteln Sie den echten effektiven Jahreszins inklusive aller Abschlussgebühren und Nebenkosten.
Anleiherendite-Rechner
Ermitteln Sie Rendite bis zur Endfälligkeit (YTM), laufende Verzinsung, Macaulay-Duration und Zinsänderungsrisiko.
Break-Even-Point-Rechner
Berechnen Sie Gewinnschwelle in Stück und Umsatz, Deckungsbeitrag und Sicherheitskoeffizient.
CAGR-Rechner
Ermitteln Sie die durchschnittliche jährliche Wachstumsrate (CAGR) und Kapitalverdopplungszeiten.
Kapitalertragsteuer-Rechner
Ermitteln Sie Steuern auf kurz- und langfristige Veräußerungsgewinne von Aktien und Immobilien.
Kreditkarten-Rückzahlungsrechner
Berechnen Sie Tilgungszeitraum, Gesamtzinsen und die Kosten von Mindestzahlungen bei Kreditkartenschulden.
Schuldentilgungsrechner (Lawine vs. Schneeball)
Vergleichen Sie Lawinen- und Schneeball-Methode zur optimalen Tilgung mehrerer Kredite.
Discounted-Cash-Flow-Rechner (DCF)
Ermitteln Sie den fundamentalen Unternehmenswert und fairen Aktienkurs mit WACC und Terminal Value.
FIRE-Rechner (Finanzielle Freiheit)
Berechnen Sie Ihr FIRE-Vermögensziel, Sparquote und Jahre bis zum vorzeitigen Ruhestand.
Zukunftswert-Rechner (Future Value)
Berechnen Sie das zukünftige Endkapital aus Einmalanlage und regelmäßigen Sparraten.
Immobilien-Leistbarkeitsrechner
Ermitteln Sie den maximalen Kaufpreis für Wohneigentum basierend auf Einkommen und DTI-Verschuldungsgrad.
Amortisationsrechner (Payback Period)
Berechnen Sie die statische und dynamische Amortisationsdauer von Investitionen.
Trinkgeld- und Rechnungs-Teiler
Berechnen Sie Trinkgeldsätze, Vorsteuer-Trinkgelder und faire Aufteilung der Gesamtrechnung pro Gast.
Anleitungen (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.
Blog (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.
Alle Finanzen-Rechner
Hypothekenrechner
Berechnen Sie monatliche Tilgungsraten, Zinskosten, Grundsteuern und vollständige Tilgungspläne.
Zinseszinsrechner
Simulieren Sie Vermögenswachstum mit Zinseszins, regelmäßigen Einzahlungen und Inflationsbereinigung.
Kreditrechner
Berechnen Sie Raten für Privatkredite, Zinskosten und Ersparnisse durch Sondertilgungen.
Investmentrechner
Prognostizieren Sie Portfoliorenditen, Reinvestition von Dividenden und langfristiges Kapitalwachstum.
Rentenrechner
Planen Sie Ihre Altersvorsorge, FIRE-Ziele und sichere Entnahmeraten für finanzielle Freiheit.
Autokreditrechner
Berechnen Sie Autofinanzierungen mit Inzahlungnahme, Anzahlung, Mehrwertsteuer und Zulassungskosten.
Gehaltsrechner
Rechnen Sie Jahresgehalt, Monatslohn und Stundensätze transparent ineinander um.
Einkommensteuerrechner
Berechnen Sie effektive und marginale Steuersätze durch progressive Steuertabellen.
Anzahlungsrechner
Ermitteln Sie Sparpläne für Immobilienanzahlungen, LTV-Verhältnisse und PMI-Schwellen.
Umschuldungsrechner
Berechnen Sie Break-Even-Punkte, Zinseinsparungen und monatliche Entlastung durch Baufinanzierungs-Umschuldung.
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.
401(k)-Wachstumsrechner
Berechnen Sie das 401(k)-Guthaben im Ruhestand, Arbeitgeberbeiträge, Zinseszinsen und monatliches Ruhestandseinkommen.
50/30/20 Budget-Rechner
Teilen Sie Ihr Nettoeinkommen in Grundbedürfnisse (50%), Wünsche (30%) und Ersparnisse (20%) auf.
Annuitätenrechner
Berechnen Sie zukünftige Rentenansprüche oder garantierte feste Entzahlungsraten im Ruhestand.
Effektivzins-Rechner (APR)
Ermitteln Sie den echten effektiven Jahreszins inklusive aller Abschlussgebühren und Nebenkosten.
Anleiherendite-Rechner
Ermitteln Sie Rendite bis zur Endfälligkeit (YTM), laufende Verzinsung, Macaulay-Duration und Zinsänderungsrisiko.
Break-Even-Point-Rechner
Berechnen Sie Gewinnschwelle in Stück und Umsatz, Deckungsbeitrag und Sicherheitskoeffizient.
CAGR-Rechner
Ermitteln Sie die durchschnittliche jährliche Wachstumsrate (CAGR) und Kapitalverdopplungszeiten.
Kapitalertragsteuer-Rechner
Ermitteln Sie Steuern auf kurz- und langfristige Veräußerungsgewinne von Aktien und Immobilien.
Kreditkarten-Rückzahlungsrechner
Berechnen Sie Tilgungszeitraum, Gesamtzinsen und die Kosten von Mindestzahlungen bei Kreditkartenschulden.
Schuldentilgungsrechner (Lawine vs. Schneeball)
Vergleichen Sie Lawinen- und Schneeball-Methode zur optimalen Tilgung mehrerer Kredite.
Discounted-Cash-Flow-Rechner (DCF)
Ermitteln Sie den fundamentalen Unternehmenswert und fairen Aktienkurs mit WACC und Terminal Value.
FIRE-Rechner (Finanzielle Freiheit)
Berechnen Sie Ihr FIRE-Vermögensziel, Sparquote und Jahre bis zum vorzeitigen Ruhestand.
Zukunftswert-Rechner (Future Value)
Berechnen Sie das zukünftige Endkapital aus Einmalanlage und regelmäßigen Sparraten.
Immobilien-Leistbarkeitsrechner
Ermitteln Sie den maximalen Kaufpreis für Wohneigentum basierend auf Einkommen und DTI-Verschuldungsgrad.
Amortisationsrechner (Payback Period)
Berechnen Sie die statische und dynamische Amortisationsdauer von Investitionen.
Trinkgeld- und Rechnungs-Teiler
Berechnen Sie Trinkgeldsätze, Vorsteuer-Trinkgelder und faire Aufteilung der Gesamtrechnung pro Gast.
Authoritative Guides for Finanzen
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 Finanzen
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.