Retirement Budget Basics

A retirement budget is not the same animal as the budget you kept while working. The paycheck is gone, the expenses have shifted, and the stakes of getting it wrong feel higher. The good news: building one is mostly a matter of sitting down with a notepad (or a spreadsheet, if that’s your style) and working through a few honest questions.

This guide walks you through it step by step.

Why a retirement budget is different

When you were working, budgeting was mostly about making the paycheck stretch to the next one. In retirement, three things change:

• Income arrives from several places instead of one. Social Security, maybe a pension, withdrawals from savings, perhaps part-time work. Each arrives on its own schedule.
• You control the “paycheck.” If you’re drawing from savings, you decide how much to take out. That freedom is wonderful — and it’s also how people accidentally overspend.
• The time horizon is long. A budget that works at 65 needs to still work at 85, after twenty years of rising prices.

None of this is cause for worry. It just means the budget deserves a little more care than the back-of-the-envelope version you may have used before.

Step 1: List every source of income

Start with what’s coming in. Write down each source and the monthly amount after taxes and deductions:

• Social Security. For 2026, benefits rose 2.8% with the annual cost-of-living adjustment, and the average retirement benefit is about $2,071 a month. Your own number is on your statement at SSA.gov — use your real figure, not the average.
• Pension payments, if you have one.
• Withdrawals from retirement accounts — your IRA, 401(k), or similar. If you haven’t settled on a withdrawal plan, a licensed financial professional can help you pick a sustainable rate.
• Part-time work or self-employment income.
• Anything else — rental income, annuity payments, royalties.

Add it up. That monthly total is the number everything else has to fit inside.

One note on Social Security: the amount that lands in your bank account is usually less than your gross benefit, because the Medicare Part B premium is deducted from most checks. More on that below.

Step 2: Separate essential from flexible spending

Now the spending side. The single most useful habit in retirement budgeting is sorting every expense into one of two buckets:

Essentials — the bills that arrive whether you like it or not:

• Housing (mortgage or rent, property taxes, insurance, basic upkeep)
• Utilities and phone
• Groceries
• Healthcare premiums and prescriptions
• Car payment, gas, and insurance (or transit costs)
• Any debt payments

Flexible spending — the things that make retirement worth retiring for:

• Travel
• Dining out
• Hobbies
• Gifts for grandchildren
• Subscriptions, entertainment, club memberships

Why bother separating them? Because when money gets tight — a rough year for savings, a big surprise bill — the flexible bucket is where you adjust. Knowing exactly which expenses can flex, and by how much, turns a scary situation into a manageable one.

A comfortable rule of thumb: if your guaranteed income (Social Security plus any pension) covers your essentials, you can weather almost anything. If it doesn’t, that gap is the most important number in your financial life, and it’s worth discussing with a professional.

Step 3: Give healthcare its own line

Healthcare is the expense retirees most often underestimate, partly because a chunk of it is invisible. In 2026, the standard Medicare Part B premium is $202.90 a month — and for most people it’s deducted straight out of the Social Security check before the money ever reaches you. It’s easy to forget you’re paying it at all.

Your healthcare line item should include:

• Part B premium ($202.90/month standard in 2026)
• Any Medicare Advantage, Medigap, or Part D premiums you pay separately
• Typical out-of-pocket costs: copays, prescriptions, dental, vision, hearing
• A cushion for the unexpected — a new pair of glasses, a dental crown, a course of physical therapy

Look at what you actually spent on these over the past year and use that as your starting estimate, rounded up a bit. Healthcare costs tend to rise faster than most other prices, so err on the generous side.

Step 4: Plan for the irregular stuff

The expenses that wreck budgets are rarely the monthly ones — it’s the annual and surprise costs that show up all at once:

• Property taxes and homeowner’s insurance (if not escrowed)
• Car registration, repairs, and eventual replacement
• Home maintenance — roof, furnace, water heater
• Holiday gifts and family travel
• Insurance premiums billed annually

The fix is simple: list each one, estimate the yearly cost, divide by twelve, and treat that amount as a monthly “bill” you pay into a separate savings cushion. When the roof leaks, the money is already sitting there.

Step 5: Account for inflation

Prices rise. Social Security helps — benefits get an automatic cost-of-living adjustment each year, and for 2026 that adjustment was 2.8%. But COLAs are backward-looking: they’re based on price increases that already happened, so your check often catches up to costs rather than staying ahead of them. And some of the things retirees spend the most on, like healthcare, have historically risen faster than overall inflation.

The practical takeaway: don’t build a budget with zero breathing room. A budget that balances to the penny today will be short in a few years. Leave a margin.

A simple worksheet

Grab a pencil and fill this in:

If the bottom line is positive, wonderful — that surplus is your cushion. If it’s negative, don’t panic: start by trimming the flexible bucket, then look at bigger levers like housing costs with a professional’s help.

Common pitfalls

• Forgetting the Part B deduction. Budgeting your gross Social Security benefit instead of what actually arrives.
• Ignoring irregular expenses. The budget looks fine until the property tax bill lands.
• No flexible category at all. A budget with zero fun in it gets abandoned by February.
• Treating the first draft as permanent. Your first budget is a guess. That’s fine — it gets accurate through revision.
• Guessing instead of tracking. Spend one month writing down what you actually spend. Most people are surprised somewhere.

When to revisit your budget

A retirement budget is a living document. Pull it out and update it:

• Once a year, ideally in the fall — that’s when the next year’s Social Security COLA and Medicare premiums are announced, so you can plug in real numbers.
• After any big life change — a move, a health event, the loss of a spouse, a new grandchild you’d like to spoil.
• After a rough stretch for your savings, to make sure your withdrawal plan still makes sense.

The first version takes an afternoon. The updates take twenty minutes. And the peace of mind — knowing exactly where you stand — is worth every minute of both.