A married couple’s joint FIRE number is your combined annual retirement spending multiplied by 25, based on a 4% first-year withdrawal rate. If you’ll spend $80,000 a year together, the target is $2 million. The formula is the same as for one person. What’s different for couples is everything around it: two sets of tax-advantaged accounts, spousal Social Security benefits, pricier health insurance before 65, and the real chance that you won’t stop working at the same time.
How to calculate a joint FIRE number #
Joint FIRE number = combined annual retirement spending x 25
Use the spending your investments will have to cover. If you’ll have a pension or plan to count Social Security, subtract that income first (see below).
| Style | Joint annual spending | FIRE number at 4% |
|---|---|---|
| Lean FIRE | $50,000 | $1,250,000 |
| Standard FIRE | $90,000 | $2,250,000 |
| Fat FIRE | $150,000 | $3,750,000 |
If you’re retiring young and want more margin, multiply by 28 or 30 instead, which corresponds to roughly 3.5% or 3.3%.
Costs that are cheaper as a couple #
- Housing: two people rarely spend twice what one person does.
- Utilities, internet and subscriptions: mostly the same for two as for one.
- Taxes: filing jointly gives you wider brackets and a bigger standard deduction.
Costs that are bigger as a couple #
- Health insurance before Medicare: two adults, and possibly children.
- Family obligations: aging parents on both sides.
- Two sets of hobbies and travel preferences that both need a line in the budget.
Use both partners’ tax-advantaged accounts #
Each spouse has their own contribution limits, which nearly doubles your tax-advantaged room. For 2026, according to the IRS:
- 401(k), 403(b) or 457: $24,500 each, plus an $8,000 catch-up at 50 and older ($11,250 at ages 60 to 63 if the plan allows)
- IRA: $7,500 each, plus a $1,100 catch-up at 50 and older
- Spousal IRA: a non-working spouse can have an IRA funded from the working spouse’s income, as long as the couple’s earned income covers both contributions
- HSA: a family high-deductible health plan allows a family HSA contribution, a useful pot for medical costs in retirement
Collect both employers’ full 401(k) matches before anything else. It’s the easiest money either of you will get.
Taxes in retirement work in couples’ favor #
Married couples filing jointly get a $32,200 standard deduction in 2026, and long-term capital gains and qualified dividends are taxed at 0% up to $98,900 of taxable income, according to IRS inflation adjustments. Put together, a couple with no other income could realize about $131,100 of qualified dividends and long-term gains in 2026 and owe no federal income tax on them. That’s a big reason couples’ actual retirement tax bills are often lower than they expect.
How Social Security works for couples #
- Spousal benefit: a spouse can receive up to 50% of the other spouse’s full-retirement-age benefit if that’s more than their own.
- Survivor benefit: when one spouse dies, the survivor keeps the larger of the two benefits. That makes delaying the higher earner’s claim toward 70 a form of insurance for whoever lives longer.
To count Social Security in your joint number, split the plan into a bridge phase before you claim and a phase after. Our guide to early retirement math with Social Security walks through it.
What if one spouse wants to retire first? #
It’s common, and often works in your favor.
- The working spouse’s pay covers current spending, so the portfolio keeps growing untouched.
- Their employer health plan can cover the family, removing the biggest early-retirement cost.
- The retired spouse’s income drops, which can open up low-tax Roth conversions.
The main risk is resentment if the arrangement isn’t talked through. Agree on how long it will last and what triggers the second retirement.
Aligning two money personalities #
One partner is often a natural saver and the other a natural spender. Forcing one rigid plan onto both rarely works. Common compromises:
- Coast FIRE: save hard until your accounts will grow to the target on their own, then both downshift to work that just covers current spending.
- Barista FIRE: one or both partners switch to part-time work that covers part of your spending and ideally includes health insurance.
- Staggered exits: one spouse retires or downshifts first, the other later.
If the conversation itself is the hard part, see how to talk to your spouse about FIRE.
A step-by-step plan for couples #
- Review a year of actual spending together. Tag what you both value and what you’d happily cut.
- Agree on a retirement budget, then calculate your joint FIRE number.
- Agree on an asset allocation you’ll both stick with in a crash. A mix one partner can’t stomach will get sold at the worst time.
- Max the matches, then the accounts, for both of you.
- Set shared milestones such as $100,000, half your number, and Coast FIRE. Celebrate each one.
Retire Goals can hold the whole plan: its FIRE Number calculator gives you the joint target, each partner’s 401(k) can be its own goal with that employer’s match modeled, and the dashboard totals every goal with a projected date. Data stays on one phone rather than syncing between accounts, so most couples keep it on one device and review it together. A JSON export lets you copy it to the other phone.
Frequently asked questions #
Should we calculate our FIRE numbers separately or together? #
Together, if you share a home and major expenses. Separate numbers tend to produce mismatched plans, and one partner can end up financially independent years before the household is. Calculate jointly, then decide who contributes what.
How do we account for future children? #
Keep your core FIRE number for adult spending and fund kid costs separately, as a temporary bridge and a college fund. Our family FIRE plan shows how to size both.
What if one of us earns much more than the other? #
Treat the savings as a shared goal rather than “my money” and “your money.” If you keep separate accounts, contribute to shared goals as a percentage of each income instead of equal dollar amounts.
Do married couples need a bigger FIRE number than two singles? #
Usually a smaller one. Shared housing and bills mean a couple typically spends less than two single people living separately, so the joint number is lower than two individual numbers combined.