Retirement Withdrawal Calculator With Social Security

How to use this calculator

Enter the investable portfolio, first-year household spending, annual Social Security and pension income, an annual return assumption, inflation, and the number of retirement years to test. Use gross or after-tax figures consistently. The calculator applies one constant annual return, then takes that year’s inflation-adjusted portfolio withdrawal.

When this calculator is useful

• Testing a retirement budget with Social Security or pension income
• Comparing a shorter and longer retirement horizon
• Seeing how inflation changes nominal withdrawals
• Checking whether a spending gap is sensitive to the return assumption

Important limitations

The model applies the same return every year, so it cannot reproduce sequence-of-returns risk. It assumes spending and outside income rise at the same inflation rate, ignores taxes, fees, required minimum distributions, benefit changes, account order, and one-time costs, and does not invest income above spending.

For best results, run at least three cases: a conservative case, a middle case, and a stretch case. If a small change in inputs creates a big change in the answer, that is a sign the decision may be sensitive to rates, fees, timing, or market performance.

How the retirement withdrawal calculation works

The first-year portfolio withdrawal is annual spending minus Social Security and pension income, with a floor of zero. If spending is $70,000 and outside income is $30,000, the portfolio supplies $40,000 in year one. On a $1 million starting balance, that is a 4% starting withdrawal rate.

For each modeled year, the calculator applies the return entered to the opening portfolio and then subtracts that year’s withdrawal. Spending and outside income both rise by the inflation assumption before the next year. This ordering is a simplification. Real cash flow arrives throughout the year, markets move every trading day, and benefit adjustments do not land on the same schedule as every household bill.

Worked example: $1 million, $70,000 of spending, and $30,000 of income

Using the default figures, the first-year gap is $40,000. At a constant 5% annual return and 2.5% inflation for 30 years, the model finishes with about $762,943. The final year’s nominal withdrawal is about $81,856, and total portfolio withdrawals over the period are about $1.76 million.

Those numbers can look more comfortable than the underlying assumptions deserve. A constant 5% path has no down years. It also has no taxes, fund expenses, adviser fees, large medical bills, home repairs, or changes in Social Security taxation. Treat the ending balance as the answer to one if-then question, not as a forecast.

Why constant returns can hide retirement risk

Two retirees can earn the same average return and get different outcomes if losses arrive in a different order. Withdrawals made after an early market decline sell more of the portfolio while prices are down, leaving fewer assets to participate in a later recovery. This calculator cannot model that sequence because it applies one smooth return every year.

Run a low-return case instead of relying on the middle case alone. You can also shorten or lengthen the horizon. If a one-point return change flips the result from a remaining balance to early depletion, the plan is sensitive and deserves a fuller year-by-year analysis.

Use a personal Social Security estimate

The Social Security Administration’s online Statement shows retirement benefit estimates at different claiming ages and the earnings record behind them. Use an estimate from that record rather than a generic percentage of salary. A spouse’s benefit, survivor benefits, continued work, and the claiming date can change household income.

Combine recurring Social Security and pension income in the outside-income field only if both are expected to start in year one. If a pension starts later, run separate phases: first model the years before it begins, then use the remaining portfolio as the starting balance for a second scenario. The Social Security break-even calculator can compare two claiming ages, while our retirement guide for couples covers household timing questions.

Inflation changes the nominal withdrawal

The calculator raises spending and outside income by one shared inflation rate. That keeps the initial spending gap constant in purchasing-power terms while the nominal dollar withdrawal grows. It is easy to audit, but actual expenses do not move together. Housing, health care, travel, and taxes can follow different paths. Some pensions have no cost-of-living adjustment or use a cap.

The Bureau of Labor Statistics describes CPI as an average change in prices for a market basket, not a measurement of one household’s exact cost of living. Test more than one inflation rate. The inflation calculator by year can show how a single expense compounds under different assumptions.

RMDs, taxes, and account order are outside this model

The IRS says required minimum distributions generally apply to traditional IRAs and many workplace plans beginning at the applicable age. The amount normally uses the prior December 31 account balance and an IRS life-expectancy factor. This calculator does not know age or account type, so it cannot calculate an RMD.

A required distribution can be larger than the amount needed for spending. A taxable-account sale, traditional IRA distribution, qualified Roth distribution, pension payment, and Social Security benefit can have different tax effects. Do not mix gross income with after-tax spending unless the tax cost is included elsewhere in the budget.

A practical three-run stress test

1. Start with spending from a real annual budget and benefits from current statements.
2. Run the expected horizon with a conservative return and a higher inflation rate.
3. Run the same plan with one point less return and five more years.
4. Write down the first-year gap, depletion year, and ending balance for each case.
5. Then list what the model omits: taxes, fees, health costs, large purchases, survivor income, and account-specific withdrawal rules.

A plan that works only under one smooth return is fragile. A plan that still has room under less favorable inputs may be better prepared, though no calculator can guarantee that savings will last.

Sources and methodology

• Social Security Administration: Social Security Statement — personal earnings history and benefit estimates at different claiming ages.
• IRS: Retirement plan and IRA required minimum distributions FAQs — covered accounts, starting rules, and the basic prior-balance calculation.
• Investor.gov: Is my money going to run out in retirement? — retirement horizon, expenses, risk, diversification, and fees to consider.
• Bureau of Labor Statistics: Consumer Price Index questions and answers — CPI scope and limits as a household inflation measure.

Method and sources reviewed September 13, 2026. Results are calculated in the browser and no personal inputs are stored. The model applies return before the annual withdrawal and stops at the selected horizon or when the portfolio is depleted.

Educational only. This calculator provides general information, not personalized retirement, investment, tax, Social Security, pension, legal, or insurance advice.

Frequently asked questions

How does Social Security change the withdrawal estimate?

The calculator subtracts first-year Social Security and pension income from first-year spending. Only the remaining gap is withdrawn from the portfolio. It raises both figures by the inflation rate entered, so their real-dollar relationship stays constant.

What return should I enter?

Use a scenario you can explain rather than a promised market return. Run lower, middle, and higher cases. This model uses the same return every year and therefore understates the damage that poor returns early in retirement can cause.

Does this calculator include taxes and investment fees?

No. Use spending and income figures on a consistent gross or after-tax basis, and reduce the return assumption if you want a rough way to reflect recurring investment costs. A tax professional can help estimate account-specific taxes.

Does it calculate required minimum distributions?

No. RMD rules depend on age, account type, prior year-end balance, beneficiary status, and IRS life-expectancy tables. Compare this cash-flow scenario with the current IRS rules for the accounts you own.

Is a 4% starting withdrawal always safe?

No. A percentage is only a starting input. Market order, inflation, fees, taxes, time horizon, asset mix, and spending changes can produce very different outcomes.