WealthDelay is a free collection of 30 personal finance calculators that show you the true lifetime cost of financial decisions. Every calculation runs entirely in your browser — nothing is sent to a server, no account required, no data stored.
The core idea: most financial tools show you what something costs today. WealthDelay shows what it costs in lifetime wealth — factoring in compound interest, inflation, and opportunity cost.
Our mission: Give every person access to the same financial math that wealth managers charge thousands to explain. Free, clear, and instant.
All calculators use standard financial formulas: Future Value of Annuity for recurring amounts, compound growth for lump sums, and inflation adjustment to translate future values into today's purchasing power. We use 7% as the default annual return — the S&P 500's historical inflation-adjusted average. Every assumption is visible and adjustable.
We do not store your inputs. All calculations run client-side in JavaScript. We use Google Analytics to understand aggregate traffic patterns (pages visited, time on site). No personally identifiable information is collected or stored by WealthDelay. See our Privacy Policy for full details.
WealthDelay is free and supported by clearly marked affiliate links to financial products we believe are genuinely useful. We may earn a commission if you open an account through these links, at no cost to you. We never accept payment to feature a product or to influence calculator results.
We also offer optional paid PDF reports for users who want a formatted, downloadable version of their calculator results. The full results are always free on screen — the PDF is a convenience option only.
Each calculator uses one of two core financial formulas depending on whether you are modelling a one-time lump sum or recurring contributions. For recurring amounts — like a daily coffee spend or monthly car payment — we use the Future Value of an Annuity formula: FV = PMT × [(1 + r)^n − 1] / r, where PMT is the periodic payment, r is the periodic interest rate, and n is the number of periods. This tells you exactly how much a recurring cost compounds over time if redirected into savings.
For lump sums, we use standard compound interest: FV = PV × (1 + r)^n. To translate future values into today's purchasing power, we apply an inflation adjustment — dividing the nominal future value by (1 + inflation rate)^n. This is why the "real" result in our calculators is always lower than the nominal figure: a dollar in 30 years buys less than a dollar today, and we believe in showing you honest numbers.
Most personal finance apps focus on budgeting — tracking what you spend month to month. WealthDelay was built to answer a different question: what is the true lifetime cost of this decision? The gap between the sticker price of a habit and its opportunity cost over 30 years is often startling. A $6 daily coffee doesn't feel expensive. But redirected into an index fund, that same spending compounds to over $200,000 by retirement.
We built WealthDelay because this kind of math used to require a financial planner or a complex spreadsheet. We wanted it to be instant, free, and accessible to anyone with a browser. No login, no subscription, no data harvested. Just the math, clearly explained.
We use a 7% annual return as the default investment rate across all calculators. This reflects the S&P 500's historical inflation-adjusted average return over the past century, widely cited in personal finance literature as a conservative long-term planning benchmark. It is not a guarantee of future performance — some years the market returns 25%, other years it drops 30%. Over 20 to 30 year horizons, however, diversified index fund investing has historically converged toward this range.
We also default to a 3% annual inflation rate, consistent with long-run US averages. Every assumption in every calculator is visible and editable — if you believe returns will be higher or lower, you can adjust the rate and see the impact immediately. We show you the levers, not just the output.
WealthDelay is an educational tool, not a financial planning platform. Calculator results are projections based on your inputs and simplified assumptions — they do not account for taxes on investment gains, variable contribution schedules, portfolio rebalancing, or sequence-of-returns risk. Results should be understood as illustrative estimates to help frame decisions, not precise predictions of future wealth.
Past market returns do not guarantee future performance. Any financial decision involving significant capital — home purchase, early retirement, debt payoff strategy — should be validated with a licensed financial advisor who understands your complete situation, tax status, and risk tolerance. See our full disclaimer for details.
For feedback, calculation corrections, or partnership inquiries, please use the feedback button on any calculator page. We take mathematical accuracy seriously and issue corrections promptly.