The short answer
On a $100,000 salary with minimal other debt, a moderate down payment, and today's mortgage rates, most lenders' rules of thumb put you somewhere in the neighborhood of a $300,000–$370,000 home price. That's a wide range on purpose — the exact number swings a lot based on your down payment, existing debt, credit score, and local property taxes, all of which this guide walks through so you can land on your own real figure instead of a generic estimate.
The two ratios lenders actually use
Mortgage affordability isn't really about your salary directly — it's about two debt-to-income (DTI) ratios lenders calculate from it. The front-end ratio caps your housing payment (principal, interest, taxes, and insurance — often called PITI) at around 28% of your gross monthly income. The back-end ratio caps all of your monthly debt payments combined — housing plus car loans, student loans, credit cards, and so on — at around 36%, though many conventional lenders will stretch this to 43–45%, and some government-backed loans allow even higher.
This is why two people earning the exact same $100,000 salary can qualify for very different loan amounts: someone with no other debt has their full 36% of headroom available for housing, while someone with a $600/month car payment and student loans has already used up a chunk of that headroom before the mortgage is even factored in.
Worked example: $100,000 salary
A $100,000 annual salary is about $8,333 in gross monthly income. Using the 28% front-end guideline, that puts a maximum comfortable housing payment around $2,300/month. After setting aside a rough estimate for property tax, homeowner's insurance, and (if applicable) HOA fees — commonly 15–20% of the total payment — that leaves roughly $1,850–$1,950/month available for principal and interest.
At a 30-year fixed rate around 6.5–6.75% — close to the national average in mid-to-late 2026 according to Freddie Mac and Mortgage Bankers Association data — that monthly principal-and-interest budget supports a loan of roughly $285,000–$300,000. Adding a 10% down payment on top brings the total home price to around $315,000–$335,000; a 20% down payment (which also avoids private mortgage insurance on most conventional loans) pushes that up to roughly $355,000–$375,000. Mortgage rates move constantly, so treat these as an illustrative snapshot rather than today's exact number — plug your real income, debts, and a current rate into Nonkera's mortgage calculator for a figure you can actually rely on.
Run your own numbers
What changes the number the most
Down payment size matters twice over: it directly reduces how much you need to borrow, and clearing the 20% threshold on a conventional loan removes private mortgage insurance, freeing up more of your monthly budget for principal and interest instead. Existing monthly debt is the other big lever — every $500/month already committed to a car payment or student loan is roughly $500/month that can't go toward a mortgage payment under the same DTI ceiling, which can shrink your affordable home price by tens of thousands of dollars.
Interest rate swings matter more than most buyers expect, too. A single percentage point move on a 30-year loan changes the payment on the same loan amount by roughly 10–12%, meaning the exact same monthly budget buys a noticeably larger or smaller loan depending on where rates sit when you buy. Where you're buying matters as well — property tax rates vary enormously by state and even by county, and a high-tax area can eat a meaningful chunk of that 28% housing allowance before principal and interest even enter the picture.
Beyond what a bank will approve you for
It's worth separating "how much a lender will approve" from "how much you should actually spend." Lenders' DTI ceilings are the maximum they consider safe from a default-risk standpoint, not a recommendation tailored to your personal savings goals, and plenty of financially comfortable buyers deliberately choose a home priced well under their maximum approval to keep room for retirement contributions, an emergency fund, and the ongoing costs of homeownership — maintenance and repairs alone commonly run around 1% of a home's value per year, on top of the mortgage payment itself.
This guide is educational, not personalized financial advice — your own comfortable number depends on your full financial picture, job stability, and goals, and a licensed lender or financial advisor can help you weigh those specifics.
Steps to find your real number
Start by running your actual gross income, existing monthly debts, and a current interest rate through a mortgage calculator rather than relying on a rule-of-thumb multiple of salary. From there, get a real pre-approval from a lender, which factors in your credit score and full financial picture more precisely than any online estimate can. If you're also comparing how a shorter loan term or different down payment size changes your total interest paid, running the numbers through a loan calculator alongside the mortgage estimate gives a fuller picture of the trade-offs before you commit to an offer.