How Much House Can I Afford in Oregon? A Real Math Guide

How Much House Can I Afford in Oregon?

Most Oregon buyers can afford a home priced at roughly three to four times their gross annual income, depending on debts, down payment, and local property taxes. A household earning $100,000 per year might qualify for a purchase price in the range of $350,000 to $450,000, though the exact number depends on your debt load, credit profile, and the loan program you use. The most reliable way to find your number is to work backward from two limits: the 28/36 rule and your lender's debt-to-income threshold. The sections below walk through each step with Oregon-specific figures. All example purchase prices and payment estimates in this guide are illustrative only and do not constitute a loan approval or guarantee of terms.

The 28/36 Rule for Mortgage Affordability

The 28/36 rule is the oldest affordability guideline in residential lending, and it still holds up well as a starting point. It works like this:

• 28 percent: Your total monthly housing payment, including principal, interest, property taxes, and homeowners insurance (sometimes called PITI), should not exceed 28 percent of your gross monthly income.
• 36 percent: All of your monthly debt payments combined, including housing plus car loans, student loans, credit card minimums, and any other recurring obligations, should not exceed 36 percent of your gross monthly income.

These two percentages act as guardrails. The 28 percent front-end limit tells you how much of your paycheck is available for housing. The 36 percent back-end limit ensures that taking on a mortgage does not push your total debt load into a place that leaves little room for savings or emergencies.

In practice, many lenders today accept back-end ratios up to 43 percent or even 45 percent for well-qualified borrowers. However, staying closer to 36 percent leaves you with meaningful financial flexibility, which I find matters a lot for buyers in the years after they close. The 28/36 rule is a guideline, not a hard ceiling, and your actual approval will depend on the full picture of your finances.

Calculating Your Maximum Monthly Payment

Once you know the rule, the math is straightforward. Start with your gross monthly income, which is your income before taxes and deductions.

Step 1: Multiply gross monthly income by 0.28.
This gives you the front-end maximum, the most your housing payment could be if debt were not a factor.

Step 2: Add up all your monthly non-housing debt payments.
Include car loans, student loans, minimum credit card payments, personal loan payments, and any other recurring obligations. Do not include utilities or subscriptions.

Step 3: Subtract your monthly debts from 36 percent of gross monthly income.
Multiply gross monthly income by 0.36, then subtract your total monthly debts. The result is the back-end maximum available for housing.

Step 4: Use the lower of the two numbers.
Whichever limit is more restrictive, the 28 percent front-end cap or the remaining room under the 36 percent back-end cap, becomes your working maximum monthly payment for housing.

That monthly payment number is the total housing cost, not just principal and interest. Oregon property taxes and homeowners insurance both come out of that budget. The next section explains how to back into a purchase price once you know what Oregon's taxes and insurance typically cost.

From Monthly Payment Back to Purchase Price (Oregon Tax and Insurance Factor)

Knowing your maximum monthly payment is only half the equation. The other half is figuring out how much house that payment can actually buy, after accounting for property taxes and insurance.

Oregon property taxes in Clackamas County tend to run roughly 0.90 percent to 1.10 percent of assessed value per year. That typically translates to somewhere in the range of $300 to $450 per month on a $400,000 to $500,000 home, though assessed values and market values often differ and your actual tax bill may vary. Oregon's Measure 50 limits annual assessment increases, so newer purchases can sometimes carry higher assessed values relative to longtime homeowners nearby.

Homeowners insurance in the Portland metro and Clackamas County area commonly runs $100 to $200 per month for a standard single-family home, depending on coverage levels, the age of the home, and your claims history.

To find your maximum loan amount from a payment, use this approach:

1. Take your maximum monthly payment from the step above.
2. Subtract estimated property taxes and insurance (combined estimate of $425 to $625 per month for a $400,000 to $500,000 Oregon home is a reasonable starting range, though your actual costs may differ).
3. What remains is the principal and interest (P&I) your budget can support.
4. Use that P&I figure and current interest rates to back-calculate a loan amount. At a 7.0 percent interest rate on a 30-year loan, every $100,000 borrowed costs roughly $665 per month in P&I. At 6.5 percent, it is approximately $632 per month.
5. Add your down payment to the maximum loan amount to arrive at a maximum purchase price.

If you are considering an FHA loan, mortgage insurance premiums also factor into your monthly payment and reduce how much P&I your budget can support. You can explore that comparison in our FHA vs. conventional cost comparison.

How Debt-to-Income (DTI) Limits the Calculation

Lenders use a metric called debt-to-income ratio, or DTI, to measure how much of your gross monthly income goes toward debt payments. It is the most important number in your mortgage application, and it can either confirm or override the 28/36 rule calculation you worked through above.

DTI is expressed as a percentage and calculated like this: total monthly debt payments (including the proposed new housing payment) divided by gross monthly income.

Common lender thresholds as of 2026:

• Conventional loans: Back-end DTI typically needs to be at or below 45 percent, though some automated approval systems may allow up to 50 percent for borrowers with strong compensating factors such as substantial reserves or a high credit score.
• FHA loans: The FHA guideline is generally 43 percent back-end DTI, though lenders with automated approval can sometimes go higher.
• VA loans: VA does not set a hard DTI cap but typically looks for a residual income cushion in addition to a DTI that is generally at or below 41 percent.

The Consumer Financial Protection Bureau provides a clear overview of how DTI is calculated and why lenders use it. If your DTI is above the threshold for the loan you want, you have two paths forward: reduce existing debts before applying, or look at a lower purchase price. I can model both scenarios during a conversation, so you can see exactly where you stand before submitting an application.

It is also worth noting that not all income counts the same way. Self-employment income, rental income, overtime, and bonus income each have specific documentation rules. If any of those apply to you, your qualifying income number may differ from your gross pay stub. Your credit score matters too, because a higher score can open the door to programs with more favorable DTI limits.

Examples by Income (Illustrative): $80K, $120K, and $180K Households

The table below shows illustrative maximum purchase price ranges for three income levels in an Oregon market context. These figures use assumptions that may not match your situation. They are designed to give you a starting mental framework, not a loan estimate. Actual results will vary based on your debts, credit score, down payment, the interest rate available to you on your application date, and local property tax and insurance costs.

A few important notes on these ranges. First, most buyers in the $80,000 income bracket will have some existing debts, which can reduce the available P&I significantly. Second, the $180,000 income example may approach conforming loan limits depending on down payment, which could affect program eligibility. Third, all three scenarios assume the borrower's credit qualifies for the rate shown. If your score is below 700, the rate and therefore the loan amount available to you may differ. I can run a scenario specific to your profile whenever you are ready.

If you want to compare down payment options at these income levels, the down payment comparison guide walks through how three, five, ten, and twenty percent down affect both your loan amount and your monthly cost.

How a Larger Down Payment Increases Your Max Purchase Price

Down payment does two things for affordability: it reduces the loan amount, which lowers the monthly payment, and it can eliminate or reduce mortgage insurance costs, which frees up more of your housing budget for principal and interest.

Here is a simplified illustration of how down payment size affects purchasing power, using a $2,000 monthly P&I budget and a 7.0 percent rate as consistent assumptions:

• 3% down: A $2,000 P&I budget supports roughly $300,800 in loan, plus a $9,300 down payment, for a maximum purchase price around $310,100. However, PMI for a conventional loan at this level typically adds $100 to $150 per month, which reduces the P&I available before PMI to closer to $1,850.
• 5% down: The same $2,000 P&I budget with a smaller PMI obligation (roughly $80 to $120 per month at 5% down) still nets you a loan in the $279,000 to $285,000 range plus the down payment.
• 10% down: At ten percent down you may be able to eliminate PMI depending on loan structure and lender, which gives the full $2,000 back to P&I. This can support a loan around $300,800 plus the down payment.
• 20% down: No PMI on conventional loans, and lenders often offer more favorable pricing to borrowers at or above twenty percent equity. The full $2,000 goes to P&I, and with a larger down payment the purchase price ceiling climbs meaningfully.

The relationship between down payment and purchase price is not strictly linear because PMI adds a complicating layer. The three, five, ten, and twenty percent down payment comparison shows the full cost picture including PMI for each option. Oregon Housing and Community Services also offers down payment assistance programs for qualifying buyers, which can help bridge the gap. You can learn more at Oregon Housing and Community Services.

All PMI cost estimates above are illustrative. Actual PMI rates vary by lender, loan program, credit score, and loan-to-value ratio.

What Lenders Do Not Always Tell You About Affordability

Lenders are required to tell you what you qualify for. They are not always in the habit of telling you what you might be comfortable with. Those two numbers can be different, and knowing the gap matters.

Qualifying amount is a ceiling, not a target. A lender's maximum approval reflects what their guidelines allow given your income and debts. It does not account for your lifestyle, savings goals, or how you feel about a payment that takes up 43 percent of your income every month. I have seen buyers who qualify for more than they should probably spend, and I have seen buyers who could afford more than they think.

The rate you see advertised may not be the rate you get. Advertised mortgage rates are often for borrowers with excellent credit, significant down payments, and specific loan structures. Your rate depends on your credit score, loan-to-value ratio, loan type, and market conditions on the day you lock. A higher rate than you expected can reduce your purchasing power more than most buyers anticipate. Our credit score and mortgage rate guide explains how scores affect pricing.

The payment you qualify for includes taxes and insurance, but not maintenance. A general rule of thumb is to budget one percent of home value per year for maintenance and repairs. On a $400,000 Oregon home, that is roughly $333 per month on average. That figure does not show up in your DTI calculation, but it absolutely shows up in your bank account.

Clackamas County property tax bills can surprise buyers. Oregon's Measure 50 caps annual assessment increases at three percent, which means longtime homeowners may pay taxes on assessed values far below current market value. When you purchase, your assessed value resets, which can mean a significantly higher tax bill than the sellers paid. Always ask your real estate agent for the current assessed value and estimated post-purchase tax bill, not just what the current owner pays.

HOA fees are invisible in most online calculators. Communities in Happy Valley, Lake Oswego, and parts of Oregon City carry HOA fees that can range from $100 to $500 per month or more. These count toward your back-end DTI just like any other debt. If you are shopping in a community with an HOA, include that figure in your affordability calculation from the beginning.

Frequently Asked Questions About Oregon Home Affordability