Start with Your After-Premium Income
For most retirees, Social Security is the backbone of the monthly budget, with the average retired worker receiving about 1,976 dollars per month in 2025 after the 2.5 percent cost-of-living adjustment.
If both spouses receive Social Security, the average combined benefit will be around 3,089 dollars per month in 2025, before Medicare Part B premiums are deducted.
The standard Medicare Part B premium is 185 dollars per month in 2025, so many single retirees will see that deduction taken automatically from their Social Security check, leaving approximately 1,791 dollars of average net monthly income from Social Security.
Couples where both spouses pay the standard Part B premium will have 370 dollars deducted monthly, bringing their average net Social Security income to roughly 2,719 dollars per month — the number to use as your budget's income baseline.
Allocate for Health Care First
After Social Security and Part B, you may also pay premiums for a Part D drug plan, a Medigap supplement, or a Medicare Advantage plan, each with its own monthly cost, copays, and annual out-of-pocket limits.
The 2025 Part B deductible is 257 dollars, so it is smart to set aside at least that amount at the start of the year so an early doctor visit does not throw off your first-quarter budget.
If you have higher income and face IRMAA surcharges, your Part B and Part D premiums may be substantially above the standard amounts — confirm your exact premium from your Social Security benefit notice before finalizing your budget.
Combining all premiums, deductibles, and typical copays, many retirees find that health care consumes 15 to 20 percent of monthly income, making it the single most important expense category to plan for explicitly.
Key insight: Base your budget on your net Social Security income after Medicare Part B is deducted — not your gross benefit — so you start with a realistic picture of what actually arrives in your bank account each month.
Covering Housing, Utilities, and Food
List your essential non-medical costs next: housing, utilities, and groceries, starting with current bills and adjusting for any known changes like a mortgage payoff, rent increase, or property tax reassessment.
If you are a homeowner without a mortgage, property taxes, homeowners insurance, and maintenance can still add hundreds of dollars per month, so set aside a monthly amount for home repairs rather than waiting for an emergency.
Renters should review whether local senior housing resources or rental assistance programs are available if rent increases are outpacing Social Security COLAs, which are 2.5 percent for 2025.
For groceries and household supplies, reviewing three months of bank or credit card statements will show your true spending pattern, which is often higher than recalled due to inflation and irregular bulk purchases.
Planning for Taxes and RMDs
Many retirees owe federal income tax on a portion of Social Security benefits if they also have pension income, IRA withdrawals, or other taxable income, so it is important not to treat your gross benefit as fully spendable.
Once required minimum distributions begin at age 73, those withdrawals add to your taxable income and can push more of your Social Security into the taxable range, potentially moving you into a higher federal bracket.
If you expect significant RMDs, ask your IRA custodian to withhold a portion of each distribution for federal and state taxes — treating withholding as a regular budget line helps prevent an unwelcome tax bill in April.
A simple way to estimate your tax burden is to add your gross Social Security, expected RMDs, and any other income, then use the IRS withholding estimator at IRS.gov to project quarterly or annual tax payments.
Building a Cushion for Irregular Expenses
Even the most carefully planned budget can be disrupted by irregular expenses — car repairs, dental work, new appliances, or a flight to see family — so building dedicated sinking funds is essential on a fixed income.
Consider reserving 50 to 100 dollars per month for car maintenance, a similar amount for home repairs, and another small amount for out-of-pocket medical costs not covered by Medicare such as glasses, hearing aids, or dental work.
By labeling these amounts in your written budget and depositing them monthly into a separate savings account, you will have funds ready when surprises occur instead of turning to high-interest credit or large account withdrawals.
Reviewing and adjusting your budget at least once a year — ideally in the fall when Medicare Open Enrollment runs from October 15 to December 7 — ensures your plan keeps pace with any changes in premiums, benefits, or living costs.
Related reading: emergency fund strategy · 2025 Medicare premiums