Use this guide to gather primary documents, compare a replacement-rate heuristic to a budgeted approach, and run simple withdrawal tests so you can see how sensitive your monthly income is to longevity, returns, and healthcare surprises.
Many people ask what a good monthly retirement income looks like, but the right number depends on personal circumstances. Factors such as where you live, your ongoing spending, healthcare needs, and the lifestyle you want in retirement all change the amount you should aim for, and public guidance helps translate those choices into practical targets. For an official starting point about benefits and how they fit into monthly planning, check the Social Security Retirement Planner for estimates tied to your work record Social Security Retirement Planner or the Social Security Quick Calculator Social Security Quick Calculator.
Public spending data and household pattern studies are useful because they let you compare your likely retirement spending to typical households. The U.S. Bureau of Labor Statistics Consumer Expenditure Survey provides categories and averages you can use to map current budgets into retirement needs BLS Consumer Expenditure Survey. Use these sources as starting points rather than fixed answers because headline rules and averages do not capture individual risk such as healthcare shocks or longevity.
No single monthly figure fits every retiree because incomes, debts, housing situations, and health exposures vary too much. Simple heuristics can help you start a conversation about targets, but they are not a substitute for a budget-based approach and tests that reflect your own portfolio and time horizon. One common planner idea is to use a replacement-rate target to estimate what percent of pre-retirement income you will need.
Two headline benchmarks are commonly used in planning. The first is a replacement-rate target of roughly 70 to 80 percent of pre-retirement income as a calibration point. The second is the 25 times rule and the related 4 percent withdrawal guideline that help turn a savings amount into an expected first-year withdrawal. These are starting points for discussion, not precise rules for every situation U.S. Census income data.
Start with a bottom-up method: list your current monthly spending as your baseline, then adjust for retirement-specific changes. Remove work-related costs such as commuting and payroll taxes you will no longer pay, add expenses you expect to increase in retirement such as healthcare or leisure, and adjust housing if you plan to downsize or relocate. Treat this as a living worksheet that you refine over time.
To make the adjustment more reliable, map each line item to BLS spending categories so you can see which categories typically change in retirement. The Consumer Expenditure Survey groups spending into housing, transportation, food, healthcare, and leisure, and it can highlight where retirees commonly spend more or less than working households BLS Consumer Expenditure Survey.
Be careful when smoothing irregular costs into a monthly number. Healthcare and long-term care often arrive as large, infrequent bills rather than steady monthly amounts. Instead of simply dividing an expected multiyear cost by 12, set a monthly reserve plus a separate contingency fund or insurance plan for spikes. Doing so keeps your ongoing monthly target realistic and avoids understating risk.
Step-by-step checklist to build a monthly estimate
If you want a quick sense of where your budget differs from typical retiree patterns, use BLS categories as a cross-check and then treat healthcare separately because it can materially change the monthly figure Fidelity Viewpoints on retirement health care costs or try Fidelity’s Retirement Income Calculator Fidelity Retirement Income Calculator.
Download a simple worksheet from FinancePolice to list monthly spending items and start your budget-based estimate, then refine it with expected healthcare and housing changes.
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A replacement rate estimates the share of pre-retirement income you will need each year in retirement. Compute it by dividing your expected retirement income need by your pre-retirement income and expressing the result as a percentage. Planners often use a 70 to 80 percent range as a quick calibration because many job-related costs fall away while some retirement expenses rise.
When is 70 to 80 percent reasonable? It can work if you expect to have lower taxes, a paid-off mortgage, modest healthcare costs, and little change in discretionary spending. Conversely, the range may understate needs if you plan significant travel, have higher expected healthcare costs, or will support dependents in retirement. Treat the percentage as a conversation starter, then check it against your budget-based estimate and Social Security projections U.S. Census income data.
Replacement rate equals expected retirement income need divided by pre-retirement income. The numerator is your budget-based annual need. The denominator is commonly your final or average pre-retirement income. Use the computation to compare scenarios, for example a lower-spending retirement versus a travel-focused retirement, and to see whether 70 to 80 percent is in the right ballpark.
Common exceptions include households with high expected healthcare exposure, those keeping their mortgage into retirement, and families planning an expensive lifestyle shift after work. Each of these tends to push the replacement-rate target higher. Conversely, if housing is paid off, taxes drop, and commuting costs disappear, the needed replacement rate can be lower. Use conditional language and test both conservative and optimistic cases rather than accepting a single percentage without verification.
The 25 times rule and the related 4 percent guideline are a simple way to convert a savings target into annual income. The idea is to multiply your desired annual portfolio income by 25 to estimate how much you need saved, or to withdraw 4 percent in the first year and adjust for inflation in following years. This gives a quick translation between a savings balance and a monthly amount you can plan to receive. Many online calculators, such as Bankrate’s retirement calculator Bankrate retirement calculator, will translate savings targets into monthly figures.
These rules come from long standing research on safe withdrawal patterns, but they rest on assumptions about returns, inflation, and lifespan that may not hold for every retiree. The original analyses, including foundational work on withdrawal rules, are useful starting points, but contemporary debate highlights the need to stress-test assumptions for sequence-of-returns risk and longer retirements Trinity Study foundational analysis.
There is no single correct monthly income. Estimate your needs by building a budget-based monthly target, subtract expected indexed benefits, and test the remaining gap with withdrawal-rate scenarios that include conservative assumptions for returns and healthcare.
Use withdrawal-rate testing rather than blind reliance on one rule. Run scenarios with lower real returns, longer lifespans, and adverse market sequences to see how sensitive your monthly income is to each assumption. If the portfolio fails under plausible scenarios, consider a lower initial withdrawal, a larger contingency reserve, or additional lifetime income sources.
To use the 25 times concept, decide on an annual amount you want from savings, multiply by 25, and that product is a ballpark savings target. To get a monthly figure, divide the annual withdrawal by 12. The 4 percent rule is the inverse: divide your saved assets by 25 to find a recommended first-year withdrawal. Both are shorthand tools that are most useful when combined with budget checks and benefit projections.
Recent critiques focus on three areas: retirees living longer than early studies assumed, periods of low expected real returns which reduce the sustainable withdrawal rate, and sequence-of-returns risk where early market losses can permanently lower sustainable income. Because these risks matter, use the 4 percent rule as a starting point and then run alternative scenarios using lower withdrawal rates or higher contingency funds Trinity Study foundational analysis.
Inflation-indexed benefits such as Social Security reduce the amount of portfolio-derived monthly income you need because they provide a predictable, inflation-adjusted floor for basic spending. For many households, expected Social Security income covers a meaningful portion of core monthly needs and changes the gap you must fund from savings.
To estimate your expected benefit, use official SSA tools and your latest statement to see projected monthly payments at different claiming ages. Subtract the expected indexed benefit from your monthly target to calculate the remaining gap that savings must fill. Official online resources let you see estimates tied to your record so you can make a realistic gap calculation Social Security Retirement Planner.
Because Social Security benefits are adjusted for inflation, they act like a hedge against rising living costs for the portion of spending they cover. That reduces the pressure on your portfolio to provide inflation protection for basic needs. However, Social Security typically replaces only part of pre-retirement income, so you will usually need a combination of indexed benefits and portfolio withdrawals.
The SSA Retirement Planner and your annual statement let you compare benefit amounts at different claiming ages. Treat these as official inputs to your gap calculation, and then test how changing assumptions such as claiming age or wage history affects the monthly amount you must generate from savings.
Healthcare and long-term care are major drivers of retirement spending and can materially raise a household’s lifetime and monthly needs. Industry analyses and policy briefs indicate retired couples commonly face hundreds of thousands in out-of-pocket lifetime health and medical costs, which means including these expected costs raises a typical monthly target substantially Fidelity Viewpoints on retirement health care costs.
Medicare covers a large share of care after age 65 for eligible people, but it does not eliminate out-of-pocket spending. The Kaiser Family Foundation explains that out-of-pocket costs vary by coverage choices and health status, and that supplemental plans, premiums, and cost sharing all affect how much retirees should budget each month Kaiser Family Foundation on Medicare out-of-pocket costs.
Typical exposures include premiums for supplemental insurance, deductibles and coinsurance, dental and vision services not fully covered, prescription drug costs, and eventual long-term care expenses such as assisted living or in-home care. These costs are often lumpy, so plan both an ongoing monthly allowance and a larger contingency for episodic needs.
Start by reviewing current premiums and outlays for medical and prescription care, then project how coverage will change in retirement. Add a monthly reserve for expected routine care and set aside a separate long-term care contingency or consider insurance options. Wherever possible, test a scenario with higher health costs to see how much your monthly target increases, and update assumptions frequently.
Use a three-part workflow: build a budget-based monthly need, calibrate it with a replacement-rate check, and translate savings into income with a withdrawal-rate test. Each step informs the others and together they produce a resilient monthly target you can iterate as assumptions change BLS Consumer Expenditure Survey. For additional budgeting resources, see related posts in our personal finance section.
Simple sensitivity checks help you see what matters most. Vary real return assumptions, test longer lifespans, and simulate healthcare shocks to learn which factors most affect your monthly income. If small changes in assumptions cause large falls in sustainable income, consider a larger contingency or more conservative withdrawal approach.
run sensitivity tests on monthly income gap using budget and savings inputs
Vary real return and lifespan assumptions
Put margin into your plan. Because uncertainty is high for returns, inflation, and health, a contingency margin for unexpected expenses or market shocks reduces the risk that you will need to cut spending later. A modest buffer also reduces stress when markets are volatile and sequence-of-returns risk is present.
First build a realistic monthly budget. Second check whether a 70 to 80 percent replacement-rate target aligns with that budget. Third run a withdrawal-rate test to see whether your savings can sustainably supply the portfolio portion of the monthly need. Iterate these steps, and document assumptions so you can revise them as facts change.
Run at least three scenarios: a base case using central return assumptions, a conservative case with lower real returns and a longer lifespan, and a healthcare shock case with elevated medical spending. Compare the resulting monthly gaps and use them to decide whether to reduce withdrawals, increase savings, or buy protection for large risks.
Decisions that change your monthly target include when to claim Social Security, whether to keep or sell housing, how much contingency to hold for health, and what withdrawal strategy to use. Each decision changes the gap you must fund from savings, so treat them as levers to tune your monthly income target Social Security Retirement Planner.
Common planning mistakes include overreliance on a single rule of thumb, ignoring sequence-of-returns risk, underestimating healthcare exposure, and forgetting taxes and fees when calculating net monthly income. Avoid these by testing multiple scenarios and by keeping a clear record of assumptions that can be reviewed periodically.
Quick prompts to gather primary documents
Conceptual workflow without numbers: gather current spending, subtract work related costs, add planned retirement spending changes, check expected Social Security, calculate the remaining gap, and test whether your savings can supply that gap under different withdrawal rules. Use this process to generate action items rather than fixed dollar targets.
How to run a basic withdrawal-rate check: decide the portion of your monthly need you expect from savings, translate that to an annual amount, apply the 25 times or 4 percent rule as a first test, then run a more conservative scenario with lower returns or longer lifespan to see how the recommendation changes. If the conservative test fails, adjust assumptions or funding sources.
Action list: gather official Social Security estimates, build your budget-based monthly number, test the gap with a withdrawal-rate scenario, and estimate healthcare exposure separately. Use the BLS Consumer Expenditure Survey to check category patterns and the SSA Retirement Planner for benefit inputs to keep calculations grounded in primary sources BLS Consumer Expenditure Survey, and visit FinancePolice for budgeting guides.
Remember that targets are personal and should be stress-tested and updated as markets, health, or housing plans change. Use conservative assumptions where uncertainty is high, and keep a contingency for healthcare or market shocks so your monthly income target is resilient.
Gather recent statements, list monthly spending by category, estimate expected Social Security benefits, and calculate the gap that savings must cover using a withdrawal test.
Social Security can cover part of basic living costs and provides inflation indexing, but it typically replaces only a fraction of pre-retirement income so most people need additional savings or income sources.
Treat the 4 percent rule as a starting point rather than a guarantee; run conservative scenarios for lower returns and longer lifespans and adjust withdrawals or contingency funds as needed.
If you need a starting worksheet or want to document assumptions, use the steps in this article to build a simple, revisable plan that reflects your personal priorities and risks.


