Retirement & Investing Calculators
Building long-term wealth requires a clear picture of where you stand today and a realistic plan for where you want to be. Our retirement and investing calculators help you model different savings scenarios, understand the power of compound growth, and stress-test your financial plan against inflation and unexpected expenses.
Start with the retirement calculator to see if your current savings rate puts you on track, then dive into 401(k) projections with employer matching, estimate your future Social Security benefits, or evaluate a traditional pension plan. Use the compound interest calculator to visualize how time and consistent contributions grow your portfolio, the net worth calculator to take stock of your full financial picture, the emergency fund tool to make sure you are covered for the unexpected, and the inflation calculator to understand how purchasing power changes over decades.
Retirement Calculator
Estimate how much you need to save for retirement and whether you are on track to reach your goals.
Compound Interest Calculator
See how your investments grow over time with the power of compound interest and regular contributions.
401(k) Calculator
Project your 401(k) balance at retirement based on contributions, employer match, and investment growth.
Social Security Estimator
Estimate your Social Security benefits based on your earnings history and planned retirement age.
Pension Calculator
Calculate your expected pension benefit based on years of service, salary, and plan multiplier.
Net Worth Calculator
Add up all your assets and liabilities to see your total net worth and track it over time.
Emergency Fund Calculator
Determine how much you need in your emergency fund based on monthly expenses and risk factors.
Inflation Calculator
See how inflation erodes purchasing power over time and what your money will be worth in the future.
What actually drives a retirement number
Time in the market beats the size of the contribution
Compound growth is not linear, and that is the whole argument for starting early. A dollar invested at 25 has forty years to double repeatedly; the same dollar at 45 has twenty. At a 7 percent real return, money roughly doubles every ten years, so the early dollar goes through about four doublings and the late one through two. The practical consequence is stark: someone contributing 300 dollars a month from 25 to 65 usually ends with more than someone contributing 600 dollars a month from 40 to 65, despite putting in less total money.
This is why the compound interest calculator is worth running before the retirement calculator. It isolates the mechanic without the noise of salary growth and withdrawal assumptions, and it makes the cost of a delayed start legible in dollars rather than in advice. The corollary matters too: if you are starting late, the lever available to you is the contribution rate rather than time, and the required rate rises steeply for every year of delay.
The employer match is the only guaranteed return you will find
A common 401(k) match structure is a full match on the first 3 percent of salary and half on the next 2 percent, giving 4 percent of salary from the employer for 5 percent from you. On a 75,000 dollar salary that is 3,000 dollars a year of employer money. Declining it by contributing below the match threshold is the clearest unforced error in retirement saving, because no investment offers an instant 50 to 100 percent return with no risk.
Vesting is the one caveat. Employer contributions may vest on a cliff or a graded schedule over several years, and leaving before vesting forfeits the unvested portion. Your own contributions are always yours. Model the match explicitly in the 401(k) calculator rather than folding it into a single contribution figure, because the match changes the trajectory enough to be worth seeing on its own, and because it is the number to check first when comparing two job offers.
Traditional and Roth are a bet on your future tax rate
Traditional contributions are deducted now and taxed on withdrawal. Roth contributions are made from taxed income and withdrawn tax-free. If your tax rate were identical in both periods, the two would produce the same result, so the entire question is whether you expect to pay a higher or lower rate in retirement than you do today. Early-career workers in low brackets, and anyone expecting a substantial income rise, generally have the stronger case for Roth. High earners in peak years often prefer the deduction now.
Two secondary effects push the balance further toward Roth than the simple comparison implies. A Roth dollar and a traditional dollar are not equivalent at the same nominal amount, because the traditional dollar has an embedded tax liability, so the same contribution limit effectively shelters more in a Roth. Roth accounts also give you tax diversification, which is worth something on its own given that nobody knows what rates will be in thirty years. The practical answer for most people is to hold both, which also preserves the ability to manage taxable income in retirement.
Withdrawal rates, inflation and the emergency fund underneath it all
The 4 percent rule, drawn from research on historical portfolio survival, says that withdrawing 4 percent of the initial balance and adjusting for inflation each year has historically lasted 30 years. It implies a target of roughly 25 times annual spending, so 60,000 dollars a year of expenses points at about 1.5 million. Treat it as a planning anchor rather than a guarantee: it assumes a particular asset mix, a 30-year horizon and a return history that may not repeat, and later research has argued for both higher and lower figures depending on those assumptions.
Inflation is the quiet variable that makes long-range numbers deceptive. At 3 percent, prices double in roughly 24 years, so a 60,000 dollar lifestyle costs about 120,000 in nominal terms by the time a 40-year-old retires. That is why the retirement calculator reports inflation-adjusted figures, and why the inflation calculator is useful for sanity-checking any long-horizon number. Underneath all of it sits liquidity: three to six months of expenses in cash is what stops a bad year from turning into an early withdrawal, and an early withdrawal from a retirement account triggers both tax and, before 59 and a half, generally a 10 percent penalty.