There is no responsible one-number answer for everyone. A useful retirement target starts with the annual spending your household expects, subtracts reliable retirement income, and then models how the remaining gap may change across your retirement years. Your age, savings, housing, taxes, healthcare costs, inflation, and investment-return assumptions all change the result.
Why does one universal retirement number fail?
Two households can earn the same salary and need very different retirement savings. One may enter retirement with a paid-off home, modest travel plans, and a pension. The other may still have a mortgage, support family members, retire before Medicare eligibility, and depend almost entirely on investments.
The U.S. Department of Labor's retirement-planning material follows the same basic logic: estimate retirement income, estimate expenses, compare the two, and identify the shortfall that personal savings must cover. It also models a long retirement period instead of treating retirement as a single year. That is more useful than choosing a target based only on salary or a national average.
Step 1: estimate the spending retirement must support
Begin with spending, not income. Your current take-home pay includes money that may never become household spending, such as retirement contributions. At the same time, retirement may introduce costs that are small or absent today.
Review at least several ordinary months and include irregular annual costs. RetireStride's browser-only spending tool can summarize a CSV, OFX, or QFX statement without uploading the raw file or normalized transactions to the server. Manual entry works just as well.
Separate the estimate into categories you can question:
- Housing: mortgage or rent, property tax, insurance, maintenance, utilities, and possible relocation.
- Healthcare: premiums, deductibles, copayments, prescriptions, dental and vision care, and costs before Medicare eligibility.
- Daily living: food, transportation, clothing, communications, and household services.
- Flexible goals: travel, hobbies, gifts, and charitable giving.
- Large events: vehicle replacement, home repairs, family support, or other limited-duration expenses.
Keep the first estimate in today's dollars. A planning model can then apply an explicit inflation assumption rather than forcing you to guess a future nominal amount.
Step 2: estimate recurring retirement income
Next, identify income that may reduce the amount your savings must provide. Use gross annual amounts consistently and avoid counting the same income twice.
- Social Security: review your official Social Security Statement and compare estimates for different claiming ages. The Social Security Administration provides both the Statement and an online benefits calculator.
- Pensions: use a current plan estimate and note whether the amount changes with survivor elections or inflation adjustments.
- Fixed retirement income: include only payments you reasonably expect to continue, and record their start and end ages when they are temporary.
- Work in retirement: model it as a limited scenario instead of assuming it must continue forever.
Do not treat an account balance as recurring income. A 401(k), IRA, brokerage account, or cash balance is an asset that can fund withdrawals; it is not an annual payment by itself.
Step 3: calculate the annual funding gap
Subtract expected recurring income from expected spending. The result is the amount that savings and investments may need to cover in that year.
A flat multiplication rule cannot represent a household whose Social Security starts several years after retirement, whose mortgage ends midway through retirement, or whose planned expense lasts only three years. Model those timing differences explicitly.
Step 4: include costs that shortcuts often miss
Healthcare is not one fixed line item. Medicare's official cost pages separate premiums, deductibles, coinsurance, and costs by coverage choice. They also change over time. Use the current official information when you review the plan, but avoid embedding today's premium as if it will remain unchanged for decades.
Taxes depend on the source of money. A pre-tax retirement account, a Roth account, a taxable account, Social Security, and a pension do not necessarily create the same taxable income. RetireStride v1 does not provide individualized tax advice, so treat tax assumptions as a scenario to review with an appropriately qualified professional.
Housing can change twice. A mortgage may end, but property tax, insurance, utilities, and maintenance remain. A move can reduce one cost while creating transaction expenses or higher costs elsewhere.
Long life changes the horizon. The question is not only when you expect to die. A planning horizon should also show what happens if one member of a household lives longer than expected.
Step 5: test more than one scenario
A single projection can hide how sensitive the answer is. Keep a base case, then change one meaningful assumption at a time:
- retire one or two years later;
- use a lower investment-return assumption;
- increase annual spending or healthcare costs;
- delay a recurring income start date;
- extend the plan-end age;
- add a large temporary expense.
The purpose is not to predict the future precisely. It is to see which assumptions matter most and which actions create useful room in the plan.
Where do rules of thumb fit?
Salary multiples, replacement ratios, and withdrawal-rate shortcuts can be rough comparison points. They are not substitutes for a household plan. A salary multiple ignores spending, pension income, housing, taxes, and the timing of retirement. A withdrawal-rate shortcut can conceal the investment mix, retirement length, fees, and willingness to reduce spending after a difficult market period.
Use a shortcut to ask whether your result is in a plausible range. Use your own spending, income, timeline, and assumptions to decide what deserves further investigation.
Review the target at least once a year
A retirement target is a dated estimate, not a permanent verdict. Review it after major life changes and at least annually. Investor.gov recommends understanding assets and liabilities through a net-worth statement; updating that view makes progress measurable. Also review your Social Security earnings record and benefit estimate, current pension information, and the latest official healthcare costs.
Record why an assumption changed. That is more useful than silently replacing an old number, because it lets you distinguish a real change in circumstances from ordinary market movement.
How does RetireStride help?
The RetireStride retirement calculator keeps the major assumptions visible and models annual results for one- or two-person households. Anonymous use requires no bank connection. You can manually enter savings, spending, income, housing, and timing assumptions, then compare scenarios. For dated account withdrawals across multiple years, use the multi-year retirement scenario tool to compare explicit RMD, tax, Medicare IRMAA, and spending assumptions. The calculation methodology explains the sequence and limits.
RetireStride provides educational estimates, not individualized investment, tax, insurance, healthcare, or legal advice. A projection should help you prepare better questions and identify uncertain assumptions; it should not be treated as a guarantee.