Mortgage · Free calculator

Dual-Income Mortgage Affordability Calculator

Combine two salaries and both sets of debts into one approval picture, and test what happens if one income pauses.

Short answer

Dual-Income Mortgage Affordability Calculator

$704,112Affordable price

Lenders usually cap total debt near 36% of gross income. That leaves $3,850 a month, which borrows about $609,112 — $704,112 with your $95,000 down.

How it's calculated: $3,850 a month at 6.5% over 30 years Adjust the inputs below to recalculate for your own numbers.

Country context

Tailor estimates to 🇺🇸 United States

All math runs in USD. We overlay United States-specific tax and cost assumptions + show local-currency equivalents at an approximate FX rate.

Transfer tax / stamp duty

1.00%

One-time on purchase

Annual property tax

1.10%

of assessed value

Rental income tax

22.0%

indicative effective

Typical mortgage rate

7.00%

Gross yield: 5–9%

🇺🇸 United States note: Property tax varies massively by state (0.3% Hawaii → 2.2% NJ). 1031 exchange can defer capital gains on investment property. Tax rates are national midpoints — they vary by region, residency, and property type. FX shown at an approximate USD reference rate (updated periodically). This is an educational tool, not legal, tax, or investment advice.

New here? Watch it work in 2 seconds — then tweak it for you.

Gross annual income$165,000

Existing monthly debt payments$1,100

Car loans, student loans, credit card minimums and child support

Down payment / cash available$95,000

Interest rate6.5%

Loan term (years)30

Try it like this

Tap a scenario to load realistic numbers, then tweak the sliders.

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Formula used

Affordability formula

Buying at the top of a two-income approval works until one income stops, which is exactly the scenario worth pricing before you sign. The calculator applies this formula to your own numbers so the answer reflects your situation rather than a generic example.

Max payment = min(36% × monthly income − debts, 28% × monthly income); Loan = payment × [(1 − (1 + i)^−n) ÷ i]; Price = loan + down payment

Model

Debt-to-income affordability model

Planning benchmark

Two-income households qualify for roughly twice the loan but carry twice the income risk

Updated

2026

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  data-calculator="dual-income-mortgage-affordability-calculator"
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  data-query="annualIncome=165000&monthlyDebt=1100&downPayment=95000&interestRate=6.5&termYears=30"></script>

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RevenueLab. (2026). Dual-Income Mortgage Affordability Calculator. Retrieved from https://www.revenuelab.fyi/dual-income-mortgage-affordability-calculator

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Markdown

Source: [Dual-Income Mortgage Affordability Calculator — RevenueLab](https://www.revenuelab.fyi/dual-income-mortgage-affordability-calculator) (2026).

Why the dual-income mortgage affordability calculator matters

Buying at the top of a two-income approval works until one income stops, which is exactly the scenario worth pricing before you sign. This page turns that decision into a handful of inputs you can defend in a budget review: volume, unit cost, rate of adoption, and time. The output is a planning baseline, not a promise — it tells you whether the idea deserves a vendor quote, a pilot, or a pass.

• Biggest swing factor: combined income and the debts each partner brings
• Second-order factor: the mortgage rate
• Often ignored: the deposit assembled between you

What actually changes the answer

combined income and the debts each partner brings moves this number first, then the mortgage rate. Run a conservative case and an upside case before you commit. If the maths only works in the upside case, treat it as a time-boxed test with a kill date rather than a line in next year's plan.

What to do with the result

Run the same purchase on the larger income alone. If it fails badly, buy below the joint maximum.

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FAQ

What does the dual-income mortgage affordability calculator work out?

It applies Max payment = min(36% × monthly income − debts, 28% × monthly income); Loan = payment × [(1 − (1 + i)^−n) ÷ i]; Price = loan + down payment to the values you enter for gross annual income, existing monthly debt payments, down payment / cash available, interest rate, loan term (years). Buying at the top of a two-income approval works until one income stops, which is exactly the scenario worth pricing before you sign.

How accurate is this dual-income mortgage affordability calculator?

Simple combination of incomes and debts. Lenders may treat variable or bonus income differently for each applicant. Replace the defaults with your own invoice, usage export, payroll data, statement, or vendor quote before making a commitment — the maths is exact, so the answer is only as good as the inputs you feed it.

Which input should I stress-test first?

combined income and the debts each partner brings. Re-run with a pessimistic value for it; if the decision flips, that assumption is the thing you need real data on before signing anything. After that, check the mortgage rate and the deposit assembled between you.

Which scenario should I start from?

Start with the preset closest to your situation — cautious budget, today's numbers, stronger position — then edit the sliders. Presets are realistic starting points, not benchmarks to match, and every change updates the result instantly.

What should I do after running the numbers?

Run the same purchase on the larger income alone. If it fails badly, buy below the joint maximum. A useful planning benchmark to compare against: Two-income households qualify for roughly twice the loan but carry twice the income risk.

Can I share or save this calculation?

Yes. Your inputs are written into the page URL, so copying the link shares the exact scenario you are looking at — the person who opens it sees the same numbers. You can also export the inputs and results to CSV or PDF from the result card and keep it with the rest of your workings.

How this calculator is built

Independently maintained

Written by Sam Doshi and the RevenueLab editorial team. We don't sell the data feeds this tool is built on.

Sourced from primary data

Benchmarks come from public AdSense / Stripe / IRS disclosures and reader-submitted data — never third-party "$X per view" claims. Full methodology.

Last editorial review

Reviewed on a rolling quarterly cycle. Dated reviews are published on the methodology record for each calculator.

Editorial standards

See our editorial policy and disclaimer. Results are estimates, not advice.

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