Couples Coast FIRE Calculator
Model two people against one household retirement plan. Retire together, let one partner retire first, or keep separate Coast FIRE responsibilities without counting the same household spending twice.
What Does Your Couples Plan Look Like?
Select the scenario that matches your household. The calculator will adapt to reveal only relevant inputs.
Your Couples Coast FIRE Plan
Retire Together ModePartner A
Partner B
Both portfolios use the same number of years until the shared retirement date. The calculator shows how old each partner will be then.
Total annual living expenses for both partners combined in retirement.
Ongoing ContributionsConfigure ongoing monthly retirement contributions
Contributions change the projected portfolio path. They do not change the definition of the no-new-contributions household Coast FIRE target.
Planning AssumptionsReuse site shared return, inflation and fee assumptions
Modeled Real Return: 3.69%/yr
Are You Coast FIRE as a Household?
Household Coast FIRE Target Today
Together, you currently have $250,000 invested against a modeled household Coast FIRE target of $808,499. Your shared retirement date is 25 years away.
Combined Investments
$250,000
Gap / Surplus
-$558,499
Years Until Both Retired
25 Years
Full Household Target
$2,000,000
How Each Partner Fits Into the Household Plan
Partner AAge 35 → 60
Partner BAge 40 → 65
Couples Coast FIRE Path to Retirement
Modeled household portfolio trajectory from today until your retirement target.
Same Retirement Age Is Not the Same as Same Retirement Year
Choose the timeline that matches your actual plan. For couples with an age gap, retiring at the same age and retiring in the same year are two different scenarios.
What If Only One of You Stops Contributing?
Compare projected household portfolio value at retirement under four contribution choices.
A: $500/mo | B: $500/mo
Projected Portfolio
$1,105,830
Baseline Plan
A: $0/mo | B: $500/mo
Projected Portfolio
$862,130
Diff: -$243,700
A: $500/mo | B: $0/mo
Projected Portfolio
$862,130
Diff: -$243,700
A: $0/mo | B: $0/mo
Projected Portfolio
$618,430
vs Target ($2,000,000): Gap
Does Retirement Income Start at Different Ages?
Pension or Social Security income that begins at different ages can change how much household spending the portfolio must fund.
Why Couples Need One Timeline, Not One Age
If two people plan to retire in the same calendar year, both investment balances have the same number of years to grow even when their current ages differ. Their ages at retirement will be different.
When a Household Coast Number Is Not Enough
A household target works when investments and retirement spending are planned together. Separate targets become useful when partners intentionally assign different spending responsibilities or retire on materially different timelines.
Questions About Couples Coast FIRE
Answers to common questions about modeling two ages, separate accounts, contribution changes, and staggered retirement dates.
If my spouse wants to keep working after we reach our household Coast target, does that change the Coast FIRE number?▼
Not unless retirement spending, timing or assumptions change. Continued work or contributions can increase the projected portfolio, while the current no-new-contributions household Coast target remains based on the retirement plan.
Can one spouse stop working while the other keeps paying household expenses?▼
Yes. Model the years as a one-worker household and compare the working partner's take-home income with household spending. Any remaining amount that must come from investments should reduce the portfolio projection.
What if the spouse retiring first currently carries our health insurance?▼
Model the expected replacement coverage cost separately. Do not assume coverage automatically transfers to the working spouse. When the change is material, use the healthcare calculator for a dedicated estimate.
Does it matter which spouse owns most of the retirement accounts?▼
For a shared household Coast calculation, balances can be modeled together even when accounts remain individually titled. Account ownership can still matter for taxes, access and estate planning outside the core Coast calculation.
What if one spouse wants to retire at 55 and the other at 65?▼
Model the ten-year staggered period explicitly. Working income may cover some household spending; any remaining portfolio withdrawals should reduce the balance projected for the later retirement date.
Can we keep separate Coast FIRE targets while sharing housing expenses?▼
Yes. Assign each partner an explicit share of total household retirement spending. The assigned amounts should add back to the household total so shared costs are not counted twice.
What if one spouse has reached their assigned Coast target but the other has not?▼
Separate-responsibility mode can show that result. The household decision still depends on how expenses, contributions and retirement dates are shared rather than the status of one partner alone.
Should temporary expenses for children be part of our Couples Coast FIRE target?▼
Include expenses expected to continue into retirement. Temporary childcare, education or other family costs are better treated as Coast-phase cash-flow items rather than automatically making them permanent retirement spending.
Want to Start Without a Couples Preset?
Use the main Coast FIRE Calculator to enter single-person baseline spending and custom planning assumptions.
Verified Sources & Methodology
IRC Sec. 72(t)(2)(A)(v) Early Distribution Exception
2026 Federal Brackets & Standard Deductions
Summary Plan Description (SPD) Distribution Rules
Retirement Claiming Ages (62–70)