How Much House Can I Afford on a 100k Salary?

In this article

1. Key Takeaways
2. Quick Estimate for Home Affordability
3. The 28/36 Rule Explained
4. Key Factors That Move Your Affordability Number
5. Gross Monthly Income
6. Debt-to-Income Ratio (DTI)
7. Credit Score Impact
8. How Your Down Payment Changes the Number
9. How Interest Rates Change the Number
10. Property Taxes, Insurance, and Other Costs
11. Worked Example: Debt Changes the Picture
12. Choosing the Right Loan Type
13. Strategies to Increase What You Can Afford

Last updated: Sept 2026. By Alvaro Moreira, NMLS #148581. Moreira Team | MortgageRight. MortgageRight NMLS #2239; Atlanta Branch NMLS #1285851.

Key Takeaways

• On a $100,000 salary, a common example range is roughly $300,000 to $415,000, depending mainly on your down payment, debts, and the interest rate you qualify for.
• The 28/36 rule is the starting point: housing costs capped near 28% of gross monthly income, total debt capped near 36%.
• Your down payment size matters a lot. A down payment under 20% usually adds private mortgage insurance, which shrinks your buying power.
• Existing debt is often the biggest limiter, not income. Paying down a car loan or credit card can raise your affordable price more than a raise would.
• Property taxes, homeowners insurance, and PMI can add hundreds of dollars to your monthly payment on top of principal and interest.
• The loan type you choose, conventional, FHA, VA, or USDA, changes your minimum down payment and can shift your affordability range significantly.

Earning $100,000 a year, you are probably asking the same question most buyers ask first: how much house can I actually afford? There is no single answer, because your debt, credit, down payment, and the interest rate you lock in all move the number. But there is a reliable way to estimate it, and this guide walks through the math step by step using the same guidelines lenders use, along with worked examples so you can see how the pieces fit together.

Quick Estimate for Home Affordability

For someone earning $100,000 a year, a reasonable starting range is a home priced between roughly $300,000 and $415,000. Where you land in that range depends on:

• How much you put down
• Your existing monthly debt
• Your credit score and the interest rate it qualifies you for
• Local property taxes, insurance costs, and, if applicable, HOA dues

These figures are examples built on current rate conditions as of September 2026, not a guarantee of what you will qualify for. Run your own numbers with a mortgage calculator and get pre-approved so you know your real number before you start touring homes.

The 28/36 Rule Explained

Most lenders still lean on the 28/36 rule as a first filter for affordability. It has two parts:

• The 28% front-end ratio: your total housing payment, principal, interest, taxes, insurance, and any HOA dues, should stay at or below 28% of your gross monthly income.
• The 36% back-end ratio: your total monthly debt, including the mortgage plus car loans, student loans, credit cards, and other obligations, should stay at or below 36% of gross monthly income.

On a $100,000 salary, your gross monthly income is $8,333. Applying the rule:

• 28% of $8,333 is about $2,333. That is your target maximum for principal, interest, taxes, and insurance combined.
• 36% of $8,333 is about $3,000. That is your target ceiling for all debt payments together, including the mortgage.

That means if your housing payment lands at $2,333, you have roughly $667 a month left over for other debt before you hit the 36% ceiling. If you are already carrying a car payment or student loans, that room shrinks fast, which is why lenders often approve a smaller loan than the 28% number alone would suggest. Many lenders will stretch these ratios for well-qualified borrowers with strong credit and reserves, and government-backed loans like FHA allow higher DTI, but 28/36 remains the safest planning baseline. If your debt load is pushing you close to the edge, our guide on getting a loan with a high DTI ratio covers the options.

Key Factors That Move Your Affordability Number

Three factors do most of the work in determining what you can afford: your gross monthly income, your debt-to-income ratio, and your credit score.

Gross Monthly Income

Your gross monthly income is the base of the whole calculation. On a $100,000 salary that is $8,333 a month, before taxes and deductions. Lenders use this figure, not your take-home pay, to calculate your maximum housing payment and debt ratios.

Debt-to-Income Ratio (DTI)

Your DTI is your total monthly debt payments, including the new mortgage, divided by your gross monthly income. A lower DTI signals more capacity to take on a mortgage, and it often unlocks better pricing. Paying down a credit card balance or an auto loan before you apply can meaningfully raise your affordable price, sometimes more than waiting for a raise would.

Credit Score Impact

Your credit score directly affects the interest rate you qualify for, and rate has an outsized effect on affordability. A borrower with excellent credit, a low DTI, and a healthy down payment will typically see the most competitive terms available. Each loan program also has its own minimum credit score, which can determine which programs are even on the table for you.

How Your Down Payment Changes the Number

Your down payment does two things: it lowers the amount you finance, and once it crosses 20% on a conventional loan, it eliminates private mortgage insurance (PMI) entirely. Below 20% down, PMI is added to your monthly payment, which reduces how much home you can afford on the same budget.

The table below shows an example of how the down payment percentage alone can shift your affordable home price, assuming a $2,333 monthly housing budget (the 28% figure from above), an example 6.75% fixed rate, and typical combined property tax and insurance costs. Your own numbers will vary by location, so treat this as illustration, not a quote.

*Example only, based on a $2,333 monthly housing budget, an example 6.75% 30-year fixed rate as of September 2026, and typical combined tax and insurance assumptions. Ask your loan officer to run your specific scenario with today’s rate and your local tax and insurance figures.

Notice that moving from 5% down to 20% down adds roughly $70,000 of buying power in this example, both because PMI drops off and because a larger down payment means a smaller loan for the same monthly budget. If saving 20% is not realistic right now, down payment assistance programs may help close the gap, and first-time homebuyer programs often come with reduced down payment minimums.

How Interest Rates Change the Number

Mortgage rates move constantly, and even a small shift changes what you can afford. As of early September 2026, the average 30-year fixed rate has been hovering in the high 6% range, with recent weekly averages around 6.7% to 6.8%. That is meaningfully different from the roughly 7.6% rates seen in some prior periods, and it illustrates why the same $2,333 monthly budget can qualify a different loan amount depending purely on when you lock your rate.

Because rates shift week to week, do not anchor your plan to a specific number from this article. Check current mortgage rates or get a personalized quote through our custom mortgage rates tool so your affordability estimate reflects today’s market, not last quarter’s.

Property Taxes, Insurance, and Other Costs

Your monthly mortgage payment is almost never just principal and interest. Lenders qualify you based on PITI: principal, interest, taxes, and insurance. Beyond that, budget for:

• Property taxes, which vary widely by county and are based on the assessed value of the home
• Homeowners insurance, which varies by location, home age, and coverage level
• PMI if your down payment is under 20% on a conventional loan
• HOA dues, if the property is part of a homeowners association
• Closing costs, typically 2% to 5% of the purchase price, paid upfront rather than monthly

These costs can meaningfully shrink your affordable price if you only budgeted for principal and interest. Always run a full PITI estimate, not just a loan payment estimate, before setting your target price.

Worked Example: Debt Changes the Picture

Here is how existing debt narrows the range from the earlier table. Assume the same $100,000 salary, 20% down, and example 6.75% rate:

• No other debt: the full $3,000 back-end budget (36%) is available, so the 28% housing cap of $2,333 is the binding constraint, landing near $370,000.
• $500/month in car and credit card payments: only about $2,500 remains under the 36% ceiling for housing, which is still under the $2,333 front-end cap, so affordability holds close to the same range.
• $900/month in existing debt: only about $2,100 remains under the 36% ceiling, pulling the housing budget below the 28% cap and reducing the affordable price by roughly $30,000 to $40,000 in this example.

This is why paying down debt before applying often moves the needle more than people expect. It is also why a lender will sometimes qualify you for less than the 28% number alone implies.

Choosing the Right Loan Type

The loan program you choose changes your minimum down payment, your mortgage insurance situation, and sometimes your allowable DTI, all of which affect how much house you can afford:

• Conventional loans offer the most flexibility and avoid PMI entirely once you reach 20% down.
• FHA loans allow as little as 3.5% down with a 580+ credit score and generally permit a higher DTI, which can help buyers with more existing debt qualify for more home.
• VA loans allow qualified veterans and service members to buy with no down payment and no monthly mortgage insurance, which can significantly increase affordability for eligible borrowers.
• USDA loans offer 0% down in eligible rural and suburban areas, with income limits that apply.

Talk through your options with a loan officer who can walk you through the full mortgage loan process and match you to the program that maximizes your buying power for your specific situation.

Strategies to Increase What You Can Afford

If the number you are working with feels tight, a few moves can open up room:

• Increase your down payment to lower your loan amount and potentially eliminate PMI.
• Improve your credit score to qualify for a lower interest rate, which lowers your monthly payment on the same loan amount.
• Pay down existing debt to free up room under the 36% back-end ratio.
• Compare loan programs to find one with a lower down payment requirement or more flexible DTI guidelines for your situation.
• Shop multiple lenders for rate and fee differences, since even a small rate difference changes your affordable price.

The most reliable next step is a real pre-approval. It replaces these examples with numbers based on your actual income, debt, credit, and today’s rates, so you can shop with confidence instead of guessing.