Are you saving too much for retirement?
Test whether your retirement plan may leave room for more life now. This free calculator uses historical U.S. stock, bond and Treasury-bill returns from 1928 to 2025.
What would more life cost?
Compare your current spending with a temporary increase or a lifelong lifestyle. See how each changes future balances, retirement and known costs. The initial comparison covers every complete historical period tested; past results do not predict future odds.
No account needed
The calculator runs in your browser. No account is required. Account details include estimated withdrawal taxes and a retirement access age. Exact taxes and early-access exceptions still need separate review.
Market source: NYU Stern historical returns.
How the calculator works, with a worked example
Questions, answered plainly
How long will my money last?
It depends on what you spend, what comes in and how markets behave. Enter your plan and choose an age to fund it through. SpendIt tests every complete historical period available and shows whether the money covered your bills, when any shortfall began and what was left at the end. It is a range of past outcomes, not a prediction of your future.
How much can I spend in retirement?
Start with the monthly retirement budget you want. SpendIt checks it alongside your savings, contributions, income, future costs and leave-behind goal. If the plan holds up, the result shows extra monthly spending to explore above that budget. All amounts are in today’s dollars.
Am I saving too much for retirement?
You may have room to spend more if your plan can fund both today’s life and your future goals. This calculator helps explore that question using historical markets. A positive estimate is a starting point for a decision, not a recommendation to cut savings or spend the maximum.
Can I afford to retire early?
You can enter an earlier retirement age and compare the result. Pay and new contributions stop at retirement. The model then draws from available accounts and includes any later Social Security or pension income you enter. Check account access carefully: money in retirement accounts may not be available when you need it.
Is this a retirement withdrawal calculator?
Yes. SpendIt models spending, income and withdrawals from cash, savings, brokerage and retirement accounts. It uses your estimated tax rates and retirement-account access age. It does not calculate a personalized withdrawal strategy, exact tax brackets or early-access exceptions.
How is this different from the 4% rule?
The 4% rule starts with a percentage of a retirement portfolio. SpendIt tests your entered budgets, income, contributions and goals across a planning period you choose. It can compare spending before retirement as well as after. Neither a rule of thumb nor a historical test guarantees future results.
Can I use this for a Die With Zero approach?
Yes. You can explore more spending during your lifetime and set your leave-behind goal to $0. That means no minimum is required at the end; it does not mean every test ends at zero. Protected emergency money stays separate. SpendIt is not affiliated with the book or its author.
Is the big number extra spending or my whole budget?
A number with a plus sign is extra per month, on top of the budget you entered. The result also shows your combined retirement budget. If no extra is selected and your plan passes, the headline says “Your tested monthly budget” and shows the total instead.
Does the extra continue into retirement?
Only for the period you choose. The result states when the extra ends and shows the retirement budget that applies. If the extra stops earlier, it is not added to later retirement spending. You can compare keeping it for longer in “Try a change.”
Why can a one-time purchase leave the monthly limit unchanged?
The spending limit moves in $50/month steps. A purchase can reduce future balances without changing that step. Timing matters too: a tight year before the purchase can still set the same limit. The purchase comparison reruns the entire plan with that cost included.
Are inflation, taxes and fees included?
Historical inflation is included, so amounts stay in today’s buying power. Account details let you enter estimated taxes on withdrawals and an access age. Any investment fee you enter reduces returns. Exact taxes, individual bank rates and future changes in tax law are not calculated.
What does passing every historical test mean?
The plan paid every modeled bill and met your leave-behind goal in every complete period tested. A longer plan has fewer available starting years. These periods overlap, so the pass count is not a probability of future success. Future markets or personal costs can be worse.
What happens to my emergency savings?
Enter your cash balances, then choose how much to protect. That reserve is excluded from spending and from the ending balances shown. You can keep money aside without counting it as available for extra spending.
Do you collect my financial information?
No name, email or bank login is needed. Where optional research is enabled, we save age bands, rounded planning amounts and calculation progress with a month and year. You can turn it off beside the calculator. We do not sell it or give individual records to sponsors. The Privacy policy explains the fields, retention and choices.
Do sponsors influence my result?
No. Sponsorships are labeled and do not change the model, spending estimate or historical results. Product ideas are optional. Sponsors do not receive individual calculator submissions.