Free Financial Tools & Calculators

Your FIRE number is the total investment portfolio size needed to sustain your lifestyle indefinitely without working, based on the 4% Safe Withdrawal Rate (SWR) derived from the Trinity Study. The formula is: Annual Expenses × 25 = FIRE Number. If you plan to spend $60,000/year in retirement, you need $1,500,000. The Vextor Capital FIRE Calculator adds Coast FIRE (what you need invested now to let it grow to your FIRE number without adding more), Lean FIRE (minimum lifestyle), Fat FIRE (luxury lifestyle), and Barista FIRE (part-time work supplements withdrawals). Enter your current savings, monthly contribution, expected return (default 7% real), and target annual spending to get your personalized FIRE projection.

Investment fees have a compounding cost that shocks most investors. On a $100,000 portfolio growing at 7% annually for 30 years: a 0.05% expense ratio (typical index fund) costs approximately $8,000 in total fees. A 1.0% expense ratio (typical actively managed fund) costs approximately $130,000 in total fees — that is 1,500% more. At 2.0% (high-cost hedge fund or advisory fee), you lose approximately $220,000 in potential wealth. The Vextor Capital Investment Fee Calculator shows this graphically, comparing your final wealth at different fee levels. The general rule: every 1% in annual fees reduces final wealth by approximately 17-20% over a 30-year horizon.

The debt avalanche method pays off debts in order of highest interest rate first, minimizing total interest paid — it is mathematically optimal. The debt snowball method pays off debts in order of smallest balance first, building psychological momentum through quick wins. For example, with a $5,000 credit card at 22% APR and a $15,000 auto loan at 5% APR: the avalanche attacks the credit card first and saves the most interest. The snowball pays off the auto loan first if it has a smaller balance, giving an earlier payoff milestone. Research from the Harvard Business Review suggests that the snowball method leads to higher debt repayment completion rates due to motivation effects, despite being mathematically inferior. The Vextor Capital Debt Payoff Calculator models both and shows exact payoff dates and total interest for each strategy.

The optimal Social Security claiming age depends entirely on your health and longevity expectations. Claiming at 62 gives you benefits immediately but permanently reduces them by up to 30% versus Full Retirement Age (FRA). Claiming at 70 increases your benefit by 8% per year past FRA for a maximum benefit 76% higher than at 62. The break-even age between claiming at 62 versus 70 is typically 80-82 years old — if you live past that age, delaying to 70 pays off. If you have health issues or shorter family longevity, claiming at 62 may be rational. If you are married, the higher earner should almost always delay to 70 to maximize the survivor benefit for the spouse. The Social Security Administration's own data shows the average beneficiary who delays to 70 collects more in total lifetime benefits than one who claims at 62.

The standard 3-6 months of expenses is a starting point, not a universal answer. The correct emergency fund size depends on: (1) Job stability — a tenured government employee needs less than a freelance contractor; (2) Number of income streams — a dual-income household needs less than a single earner; (3) Dependents — children and elderly parents increase required cushion; (4) Fixed monthly obligations — a mortgage requires more cushion than rent; (5) Health and insurance quality — poor health coverage requires a larger buffer. The CFPB recommends that a single-income household with a mortgage and dependents maintain 6-9 months of expenses. A dual-income household with no dependents and renter status can function with 3-4 months. The Vextor Capital Emergency Fund Calculator adjusts the target based on all these factors.

The Rule of 72 is a mental math shortcut: divide 72 by an annual interest rate to estimate how many years it takes an investment to double. At 6%: 72 ÷ 6 = 12 years to double. At 9%: 72 ÷ 9 = 8 years. It works in reverse: to double in 10 years, you need approximately 72 ÷ 10 = 7.2% annual return. The rule is accurate to within 1-2% for rates between 6-10%. For continuous compounding, use 69.3 instead of 72 (the natural log of 2 × 100). You can also use it for inflation: at 3% inflation, purchasing power halves in 24 years. At 7% inflation, it halves in just 10 years. This makes the Rule of 72 one of the most useful quick-calculation tools in personal finance.

Net worth = Total Assets − Total Liabilities. Assets include: cash and cash equivalents, checking/savings accounts, brokerage accounts (market value), retirement accounts (401k, IRA — use current value), real estate (current market value, not purchase price), vehicles (current resale value, not purchase price), business equity, and collectibles/valuables with documented appraisals. Liabilities include: mortgage balance, auto loans, student loans, credit card balances, personal loans, and any other debt. Key mistakes: using purchase price for real estate and vehicles instead of current market value; forgetting to include retirement accounts as assets; forgetting to subtract the deferred tax liability on traditional IRA/401k accounts (a $500,000 traditional IRA is worth roughly $350,000-$400,000 after taxes). The Vextor Capital Net Worth Calculator walks through each category and compares your result to Federal Reserve data on median and average net worth by age group.

Inflation erosion is the gradual loss of purchasing power caused by rising prices. At 3% annual inflation, $1,000 today is worth approximately $744 in 10 years and only $553 in 20 years in real purchasing power. For investors, this means: (1) Cash savings in non-interest-bearing accounts lose real value every year; (2) Fixed-income investments with yields below inflation produce negative real returns; (3) Nominal investment returns must exceed inflation to represent real wealth growth. A portfolio returning 7% nominal with 3% inflation generates a 4% real return (approximately). The Vextor Capital Inflation Calculator uses historical CPI data from FRED (Federal Reserve Bank of St. Louis) to model purchasing power erosion under different inflation scenarios, helping investors understand the real return on their savings.

Most Vextor Capital calculators are jurisdiction-agnostic — the mathematics of compound interest, debt payoff, inflation erosion, and FIRE planning apply universally. The Currency Converter supports 170+ fiat currencies. The Social Security Break-Even Calculator is US-specific (SSA rules). The FIRE Calculator uses a default 4% SWR based on US stock market historical returns; international investors should adjust this based on their home market's historical data — European markets have historically supported a slightly lower SWR (3.5%) due to lower historical returns. The Debt Payoff Calculator works in any currency. The Mortgage Calculator defaults to USD but accepts any monthly payment amount. Vextor Capital also offers Spanish-language versions of all tools at vextorcapital.com/es/tools.

Coast FIRE is the point at which you have saved enough in tax-advantaged accounts that, even without adding another dollar of new contributions, your portfolio will grow to your full FIRE number by your target retirement age. The formula: Coast FIRE Number = FIRE Target / (1 + real return rate)^(years until retirement). Example: if your FIRE number is $2,000,000 and you have 25 years until retirement with a 7% real return, your Coast FIRE number is $2,000,000 / (1.07)^25 = approximately $370,000. Once you hit $370,000, you have 'coasted' — you can stop contributing to retirement and only cover current expenses. This is appealing to people who want to reduce financial pressure mid-career while knowing retirement is secured. Coast FIRE is distinct from Barista FIRE (working part-time to cover current expenses without portfolio withdrawals) and Fat FIRE (retiring on a much larger portfolio to fund a luxury lifestyle).

Vextor Capital tools use: ExchangeRate API (currency rates, updated every 5 minutes, mid-market rates); FRED — Federal Reserve Bank of St. Louis (historical CPI data, inflation series going back to 1913, real interest rates); Social Security Administration published benefit tables for the SS Break-Even Calculator; Federal Reserve Survey of Consumer Finances for net worth benchmarks by age; Trinity Study and subsequent academic research (Bengen, Pfau, Kitces) for SWR and FIRE calculations. Calculator inputs use documented default assumptions based on long-run historical averages. All sources are disclosed on each tool page. For complete methodology, see our Data Methodology page.

Financial calculators model deterministic scenarios — they show what happens if your inputs prove accurate over time. Real markets are stochastic: returns vary year to year, inflation is not constant, interest rates change, incomes fluctuate. A compound interest calculator showing $847,000 in 30 years at 7% means: IF returns average exactly 7% every year with no deviation, THEN you will have $847,000. Actual outcomes follow a distribution around that central estimate. For retirement planning specifically, sequence of returns risk (getting low returns early in retirement) is not captured by simple calculators. For more robust projections, Monte Carlo simulation — which models thousands of random return sequences — provides probability ranges rather than point estimates. Vextor Capital's future Retirement Planner will include Monte Carlo simulation. Currently, our calculators show deterministic projections with sensitivity analysis to model different scenarios.

Free financial tools are appropriate for educational exploration, preliminary planning, and scenario analysis. They are not substitutes for personalized advice from a licensed financial planner (CFP), tax advisor (CPA), or estate attorney. Use calculators to: understand the mechanics of a financial concept (how compound interest works), build intuition about sensitivities (how much does one extra year of savings change my FIRE date), and prepare informed questions for a professional. Do not use calculators as the sole basis for: asset allocation decisions, withdrawal rate determinations in retirement, Social Security claiming decisions, or major life financial decisions. The Consumer Financial Protection Bureau (CFPB) publishes guides on when to seek professional financial advice.