Here’s the honest answer: you can probably afford more house than feels comfortable, and less than the bank says you qualify for. The 28/36 rule is the industry’s old-school guideline for finding that middle ground — no more than 28% of your gross monthly income going to housing costs, and no more than 36% going to all your debt combined. It’s not a hard rule anymore (some loan programs stretch well past 36%), but I still use it as a gut check with almost every client, whether they’re buying in Scottsdale or Sacramento. Let me walk you through it with real numbers.
What the 28/36 Rule Actually Means
The “28” is your front-end ratio: principal, interest, property taxes, homeowners insurance, and any HOA dues, all divided by your gross (pre-tax) monthly income. The “36” is your back-end ratio: that same housing payment plus every other debt payment you make — car loans, student loans, minimum credit card payments, child support — again divided by gross income.
Lenders care most about the back-end number because it’s a better picture of your actual obligations. In my experience, conventional loans often allow back-end ratios into the 45-50% range for well-qualified borrowers, and FHA loans can go even higher with compensating factors like strong reserves or a high credit score. But just because you’re approved at 48% doesn’t mean you’ll feel good about it every month. The 28/36 rule is a comfort benchmark as much as an approval one.
A Worked Example: Same Income, Three Different Cities
Let’s say a household brings home $9,000 a month gross ($108,000/year) and has a $450/month car payment and $150/month in minimum credit card payments — $600 in existing debt.
- 28% front-end ceiling: $9,000 x 0.28 = $2,520/month for the full housing payment (principal, interest, taxes, insurance, HOA).
- 36% back-end ceiling: $9,000 x 0.36 = $3,240/month for housing + all debt. Subtract the $600 in existing debt, and that leaves $2,640 available for housing.
The lower of the two numbers wins, so this household is comfortably housed around $2,520/month all-in. Now watch how that same $2,520 payment plays out differently depending on where they buy:
- Phoenix/Scottsdale, AZ: Property tax rates here are relatively low, often under 1% of assessed value, and homeowners insurance is manageable outside flood zones. That $2,520 might support a loan amount in the neighborhood of $420,000-$440,000, depending on the rate environment and down payment.
- Denver, CO: Colorado property taxes are also fairly low by national standards, but home prices along the Front Range run higher, and HOA dues in newer communities can eat $100-$300 of that budget before you even get to principal and interest — shrinking the loan amount you can comfortably carry.
- Omaha, NE: Nebraska’s property taxes run noticeably higher than Arizona’s or Colorado’s, often 1.5%-2% of value. That tax bite means more of the $2,520 goes to escrow and less to loan amount — but home prices in Omaha tend to be lower to begin with, so the math often still works out favorably.
This is exactly why “how much house can I afford” doesn’t have one universal dollar answer. Same income, same debt, three very different comfortable price points depending on local taxes, insurance, and HOA norms.
Where Buyers Get Tripped Up
A few things I see constantly that throw the 28/36 math off:
- Forgetting property taxes reassess. California’s Prop 13 keeps increases predictable after purchase. But in Arizona, Colorado, and Nebraska, a jump in assessed value can raise your escrow payment a year or two after closing.
- Underestimating insurance. Wildfire exposure in parts of California and Colorado, and monsoon/hail risk in Arizona, have pushed premiums up in recent years. Get a real quote before you fall in love with a listing. Then use the CFPB’s debt-to-income ratio guide to see how insurance premiums factor into your overall numbers.
- Ignoring HOA dues in the ratio. Underwriters count them. A $250/month HOA is functionally the same as $250 more in principal and interest.
- Using net income instead of gross. The ratios are always calculated on gross pay, which feels generous compared to your take-home paycheck. Don’t let that fool you into overspending.
28/36 Isn’t the Only Rule in the Room
I’ll be straight with you: plenty of well-qualified buyers close loans with back-end ratios in the 40s. FHA, VA, and some conventional programs allow it, subject to credit approval and compensating factors like reserves, credit score, or a larger down payment. The rule doesn’t disqualify you from those programs — it’s a personal budgeting tool I use to help clients decide what they should borrow, not just what they can.
I’ve had clients in Denver qualify for a payment that would have left them with almost nothing for savings, travel, or a rainy-day fund. We backed into a lower purchase price instead. A year later, they told me it was the best financial decision they made during the whole process.
A Quick Way to Sanity-Check Your Own Numbers
Grab your last pay stub and a list of your monthly debts, then multiply your gross monthly income by 0.28 and by 0.36 to get your two ceilings. Whichever number is lower is your realistic housing budget. From there, you can run the numbers on an affordability calculator. That will translate that monthly payment into an actual loan amount based on current rate ranges, your down payment, and estimated taxes and insurance for your state.
Getting a Real Number, Not a Rule of Thumb
The 28/36 rule gets you in the right neighborhood. But it can’t account for your specific credit profile, the property tax rate on the exact house you’re looking at, or how much you’re putting down. That’s where a conversation with a loan officer earns its keep. We can pull real numbers for Maricopa County, Douglas County, or Douglas County, Nebraska (yes, there are two Douglas Counties and it trips people up) and show you what your actual payment looks like. If you’re ready to see real figures against your income and credit, get pre-approved and we’ll walk through it together.
FAQ
Is the 28/36 rule required to get a mortgage?
No. It’s a guideline, not a regulation. Many loan programs allow higher debt-to-income ratios subject to credit approval, but staying near 28/36 tends to leave more breathing room in your monthly budget.
Does the 28/36 rule include utilities or maintenance?
No — it only covers principal, interest, taxes, insurance, and HOA dues for the front-end ratio. Utilities, maintenance, and general cost of living are separate and worth budgeting for on top of the ratio.
Why does the same income afford different homes in different states?
Property tax rates, insurance costs, and typical HOA fees vary a lot between Arizona, California, Colorado, and Nebraska. That changes how much of your housing budget goes to the loan itself versus escrow items.
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This article is general education, not financial advice or a commitment to lend. Loan programs, terms, and availability are subject to credit approval and may change. Loanatik LLC is an Equal Housing Lender. See our licensing & disclosures.