This is one of the most important questions a buyer can ask — and one of the most frequently answered incorrectly. I’ve watched buyers go online, plug numbers into a calculator, and come back with a “maximum budget” that either wildly overestimates or underestimates what they can actually afford.
Here’s the real framework I use with buyers after 22+ years in the Phoenix Metro. It’s not complicated, but the details matter.
The Rule of Thumb — and Its Limits
You’ll hear variations of “spend no more than 28% of gross income on housing” or “buy no more than 3–5 times your annual income.” These rules exist for a reason, but they’re starting points, not answers.
The 28/36 rule: Keep your housing costs (principal, interest, taxes, insurance — collectively called PITI) under 28% of your gross monthly income. Keep your total debt payments (housing + all other debts) under 36%.
The income multiplier: A common shorthand is 3–5x your annual household income. On a $120,000 income, that’s a $360,000–$600,000 range. The actual number within that range depends on your debts, down payment, and credit score.
These rules break down when:
- You carry significant other debt (student loans, car payments, credit cards)
- Your credit score affects your interest rate significantly
- You’re putting less than 10% down
- You’re buying in a high-HOA community
The only accurate answer comes from a lender running your actual numbers. But the framework below will get you close.
The Three Variables That Determine Your Limit
1. Income
Lenders look at gross income — before taxes. They consider all verifiable, consistent income: W-2 wages, self-employment income, rental income, alimony, Social Security, part-time income that has a two-year history.
What they don’t count: overtime you’ve worked only once, bonuses without a history, cash income you can’t document, a new job you started last month.
Example: $8,500/month gross income × 28% = $2,380/month maximum housing payment. At today’s rates on a 30-year mortgage, that payment supports roughly a $380,000–$420,000 loan depending on the rate.
2. Existing Debt
This is where many buyers get surprised. The 36% total DTI cap includes your housing payment plus all other monthly debt obligations:
- Car payments
- Student loans (even income-based repayment plans — lenders use 0.5–1% of the balance in many cases)
- Minimum credit card payments
- Personal loans
- Child support or alimony
If you earn $8,500/month and pay $1,000/month in car and student loans, your maximum housing payment drops from $2,380 to $1,580 under the 28/36 rule — supporting roughly a $270,000–$300,000 loan.
Paying down or eliminating debt before applying is one of the most effective ways to increase your buying power.
3. Down Payment and Credit Score
These two factors determine your interest rate, which directly affects your monthly payment and therefore how much home a given income can support.
Credit score impact (example on a $400,000 loan):
- 760+ score: ~6.5% rate → ~$2,528/month
- 700 score: ~6.9% rate → ~$2,642/month
- 660 score: ~7.4% rate → ~$2,795/month
That’s a $267/month difference between a 760 and a 660 score — which translates to roughly $40,000 less in buying power.
Down payment impact: A larger down payment reduces your loan balance and eliminates or reduces PMI, both of which lower your monthly payment and increase how much home you can afford on the same income.
What Phoenix Prices Actually Look Like in 2026
Let me give you real context for the Phoenix Metro:
| Area | Typical Starter | Mid-Range | Move-Up |
|---|---|---|---|
| Buckeye / Surprise | $350K–$420K | $420K–$520K | $520K+ |
| Mesa / Tempe | $380K–$460K | $460K–$580K | $580K+ |
| Chandler / Gilbert | $420K–$550K | $550K–$700K | $700K+ |
| Scottsdale | $550K–$750K | $750K–$1.1M | $1.1M+ |
| Queen Creek | $380K–$480K | $480K–$600K | $600K+ |
These are broad ranges — specific neighborhoods, lot sizes, age, and condition create significant variation within each area.
A Realistic Scenario
Let me walk through a real example.
Household income: $110,000/year ($9,167/month gross)
Existing debt: $600/month (one car payment, minimum credit card)
Credit score: 720
Down payment: 5% ($22,500 on a $450,000 home)
Estimated HOA: $100/month
Estimated property taxes + insurance: $500/month
Monthly housing budget at 28% of gross income: $2,567
Subtract taxes, insurance, HOA: $2,567 – $600 = $1,967 for principal and interest
At 6.75% on a 30-year loan, $1,967/month supports a loan of approximately $295,000–$310,000.
With 5% down on a $450,000 home, the loan needed is $427,500 — which requires a higher payment. That same buyer would need to either increase their down payment, reduce other debts, or look at homes in the $380,000–$400,000 range.
This is why pre-approval matters. These calculations get specific fast.
Don’t Forget the Full Cost of Homeownership
Your mortgage payment is not the only cost. Phoenix buyers should budget for:
Monthly costs beyond PITI:
- HOA fees: $0 to $500+/month depending on community
- Utilities: Phoenix cooling costs run high June–September
- Maintenance reserve: 1% of home value per year is a common benchmark
Upfront costs at closing:
- Down payment (see our guide on down payment options)
- Closing costs: typically 2–5% of the purchase price
- Inspection fees, appraisal, moving costs
A buyer who stretches to their maximum mortgage approval and ignores HOA, utilities, and maintenance often ends up house-poor. The goal is a payment that’s comfortable, not one that’s technically possible.
How to Find Your Real Number
Here’s my recommended sequence:
- Pull your credit report. Know your score before a lender does. Dispute any errors. Address anything addressable.
- List all your monthly debts. Be honest. Minimums on everything.
- Calculate your front-end DTI target. Multiply gross monthly income by 0.28. That’s your maximum housing payment.
- Run numbers on the mortgage calculator. Plug in loan amounts at current rates to see what payments look like.
- Get pre-approved. This is the only step that gives you a real, lender-verified number.
The pre-approval process reveals things the rules of thumb don’t — how your specific debts affect your DTI, how your credit score affects your rate, and whether any income documentation issues need to be addressed.
My Honest Take
The market in Phoenix is real. Prices are real. But so is the inventory, and there are more options in the $380,000–$500,000 range for a qualified buyer than most people expect.
I’ve helped buyers find the right home at every budget level in this market. The buyers who succeed are the ones who know their actual number — not the optimistic number, and not the scared-off number — and search accordingly.
If you want to know what you can realistically buy in the Phoenix Metro right now, let’s have a 15-minute conversation. No obligation, no pressure — just real information.
Call Mike at (480) 201-3700 or contact me here — I’ll point you toward the right lenders and show you what’s available at your budget.
Mike Caruso | HomeSmart Elite, Scottsdale AZ | 22+ years | 500+ homes sold
