The Loan Affordability Calculator answers “how much home can I afford?” from your income, existing debts, down payment, rate and DTI limits. It returns the maximum monthly housing payment, the maximum loan and the maximum purchase price — the guardrails before you shop.
Loan Affordability Calculator
Find the maximum home price you can afford from income, debts, down payment, rate and DTI limits. See max monthly payment, max loan and max price.
Income & debt
Loan & limits
What you can afford
Export & Share
About Loan Affordability Calculator
Features
- DTI-based: Front-end and back-end limits, lower wins.
- Max payment: Highest sustainable monthly housing cost.
- Max loan & price: Loan then price from the down payment.
- Debt aware: Existing debts reduce capacity.
- Export: CSV, JSON or plain text.
How to Use
- Income: Gross monthly (or annual) income.
- Debts: Other monthly debt payments.
- Down & loan: Down payment, rate, term, DTI limits.
- Read: Max payment, loan and price.
- Export.
Examples
Example 1 — Clean file. $8k/mo income, no debt, 28% front-end: ~$2,240 housing, large buying power.
Example 2 — Car loan. $500/mo debt cuts the back-end allowance and the price.
Example 3 — Big down. More down raises max price for the same payment.
Example 4 — Higher rate. Rate rise lowers the loan a payment supports.
Example 5 — Stricter DTI. A 36% back-end cap vs 43% trims capacity.
Benefits
- Shop with confidence: Know your ceiling before looking.
- Debt reality: See how existing loans shrink capacity.
- DTI clarity: Understand the limits lenders use.
- Private: No account, no upload, nothing stored.
Frequently Asked Questions
What is DTI?
Debt-to-income ratio: your total monthly debt payments divided by gross monthly income. Lenders cap it.
Which DTI limit applies?
Front-end caps housing alone (often 28%); back-end caps housing plus other debt (often 36–43%). The lower wins.
How is max price found?
Max housing payment → max loan via the amortization formula → max price = loan + down payment.
Why does debt reduce it?
Existing loans, cards and leases eat the back-end allowance, lowering what you can borrow.
Does this include tax and insurance?
Yes — they are part of the housing payment in the DTI math.
Is the result a guarantee?
No — it is a planning estimate; the lender’s full underwriting decides.
Is my data stored?
No. All calculation runs in your browser; nothing is uploaded, saved or logged.