There’s a number floating around that gets repeated so often it sounds like law: spend no more than 28% of your gross monthly income on housing. If you earn $80,000 a year, that’s about $1,867 a month toward your mortgage. Clean rule, easy math.
The problem? In Phoenix right now, that number won’t get you much.
As of recent market data, the median home price in the Phoenix metro sits close to $430,000. Run that through a standard mortgage calculator with a 6.7% rate and 5% down, and your monthly principal, interest, taxes, and insurance lands somewhere around $3,100 to $3,300. To keep that payment inside the 28% threshold, you’d need gross income above $130,000. That’s not a first-time buyer number for most households.
So let’s talk about how affordability actually works in Arizona — and how to figure out your real number before you start browsing listings.
The Two Ratios Lenders Actually Use
Banks don’t look at just one number. They use two debt-to-income ratios (DTI), and understanding both will save you from surprises during underwriting.
Front-end ratio — This is your proposed housing payment (principal, interest, taxes, insurance, and HOA if applicable) divided by your gross monthly income. Most conventional lenders want this at or below 28%.
Back-end ratio — This includes every recurring debt obligation: housing payment, car loans, student loans, minimum credit card payments, and any other monthly debt. Lenders typically want this below 43%, though many conventional programs will stretch to 45% or even 50% with strong compensating factors like a high credit score or significant cash reserves.
Here’s what that looks like in practice for someone earning $90,000 a year:
| Category | Monthly Figure |
|---|---|
| Gross monthly income | $7,500 |
| Max front-end (28%) | $2,100 |
| Max back-end (43%) | $3,225 |
| Car payment | $600 |
| Student loan | $350 |
| Remaining for housing | $2,275 |
Notice that the car and student loans cut directly into your housing budget. That $600 car payment doesn’t just affect your lifestyle — it shrinks your qualifying loan amount by roughly $80,000 to $90,000. That’s a real chunk of purchasing power gone. The average new-car payment is shrinking homebuyers’ budgets in ways most people don’t calculate until they’re sitting in front of a lender.
What Salary You Actually Need at Different Price Points
Phoenix and its suburbs cover a huge range of price points — from sub-$300,000 condos in parts of Mesa to $600,000+ single-family homes in Chandler and Gilbert. Here’s a rough breakdown of what income you need to comfortably support different purchase prices, assuming 10% down, a 6.7% rate, and no other debt:
- $300,000 home — Monthly payment roughly $2,100–$2,300. Target salary: $85,000–$95,000.
- $375,000 home — Monthly payment roughly $2,600–$2,800. Target salary: $105,000–$115,000.
- $450,000 home — Monthly payment roughly $3,100–$3,300. Target salary: $125,000–$135,000.
- $550,000 home — Monthly payment roughly $3,700–$4,000. Target salary: $155,000–$165,000.
These numbers assume relatively clean debt profiles. If you’re carrying $700 a month in car and student loan payments, add $30,000 to $40,000 to each salary figure.
The picture isn’t entirely grim, though. Affordability has been quietly improving as wage growth catches up and some sellers get more realistic on pricing.
The Down Payment Variable Nobody Wants to Talk About
The down payment changes everything. A lot of buyers get fixated on the monthly payment while ignoring the impact of what they put down up front. Putting down 20% instead of 5% on a $400,000 home drops your loan amount by $60,000 — that’s roughly $400 off your monthly payment before you even account for eliminating private mortgage insurance (PMI).
PMI on a low-down-payment loan typically runs 0.5% to 1.5% of the loan amount annually. On a $380,000 loan, that’s $158 to $475 every month — money that builds zero equity and disappears the moment you hit 20% equity.
If you’re short on down payment funds, there are options worth investigating. Arizona has several down payment assistance programs through the Arizona Housing Finance Authority, and some builders in the Phoenix area are offering rate buy-downs that effectively do the same thing. Don’t skip over FHA loans either — at 3.5% down and more flexible DTI thresholds, they open doors for buyers who can’t yet hit conventional benchmarks.
Local Factors That Can Shift Your Budget
Arizona has a few quirks that don’t show up in national mortgage calculators.
HOA fees are real and significant, especially in Scottsdale, Chandler, and newer master-planned communities in Queen Creek and Buckeye. A $350/month HOA on a $420,000 home doesn’t just raise your monthly costs — it counts fully against your front-end DTI ratio. I’ve seen buyers qualify for a $450,000 home and then lose $30,000 to $40,000 in purchasing power simply because the community they loved had a high HOA.
Property taxes in Maricopa County run around 0.5% to 0.7% of assessed value annually — lower than the national average, which is one of Arizona’s genuine affordability advantages. But assessed value and purchase price are different numbers, so don’t assume your neighbor’s tax bill predicts yours.
Summer utility costs are also real. Air conditioning a 2,200-square-foot house in the East Valley from June through September can run $250 to $400 a month. That’s not a mortgage expense, but it affects what you can realistically afford every month.
What to Do Before You Talk to a Lender
Pull your numbers together now, before anyone runs your credit.
- Add up every recurring monthly debt payment
- Identify your actual gross monthly income (W-2 earners are simpler; self-employed buyers need two years of tax returns)
- Estimate your available down payment, including what you’d keep as reserves after closing
- Know your credit score — even a 40-point difference between 680 and 720 can shift your interest rate by 0.25% to 0.5%, which matters more than most buyers realize
The Phoenix market has some breathing room right now compared to 2022 and 2023, and there are deals to be found — especially in the outer suburbs and on new construction where builders are still motivated. But knowing your real budget number before you fall in love with a house is how you stay in control of the process instead of scrambling to justify a purchase that was always a stretch.
Figure out your ceiling first. Then we can talk about where to find the best value under it.