Most first-time buyers can afford a home whose total monthly housing cost stays at or below 28% of gross monthly income, with all debt payments combined at or below 36%. On a $75,000 salary that's roughly $1,750 a month for housing and $2,250 a month for every debt you carry. The harder truth sits underneath that math: the number a lender approves you for and the number you should actually spend are rarely the same. A preapproval is a risk calculation, not a budget. This guide walks through both numbers, what lenders check to produce them, and the costs beyond principal and interest that quietly break first-year budgets. If you're a year or two out from buying, Roots Growth helps renters build the credit and savings that set that number in the first place.
Table of Contents
Start With the 28 and 36 Rule
The 28/36 rule is the oldest and still the most useful affordability guideline in housing. Housing costs at or below 28% of gross monthly income. All debt payments combined, housing included, at or below 36%.
Two details make or break the math. First, the 28% is gross income, not take-home. Second, the 28% covers your entire housing cost, not just the loan payment. Principal, interest, property taxes, homeowners insurance, mortgage insurance, and HOA dues all live inside that 28%.
The gap between the two ratios is the part people skip. If housing takes 28% and total debt is capped at 36%, you have 8% of gross income left for car loans, student loans, and credit card minimums. On a $75,000 salary that's only $500 a month for everything else. A $550 car payment alone puts you over.
This is why paying down consumer debt before you apply often raises your buying power more than saving another few thousand dollars does.
What Lenders Actually Check
A lender reduces you to a handful of numbers, and debt-to-income is the one that decides how large a loan you can carry.
They compute two ratios. The front-end ratio is your proposed housing cost divided by gross monthly income. The back-end ratio is every monthly debt payment, housing included, divided by gross monthly income. The 28 and 36 figures are the guideline versions of those two ratios, and some loan programs will stretch the back-end higher when you bring compensating strengths like a large down payment or strong reserves.
Beyond DTI, underwriting looks at your credit score and history, the stability and documentability of your income, your assets and cash reserves after closing, and the appraised value of the property. Self-employed income and variable income get scrutinized harder and usually need a two-year history.
One thing lenders don't look at: your actual spending. Childcare, groceries, medical costs, and retirement contributions are invisible to the ratio. That omission is the entire reason the next section exists.
What You Are Approved For Versus What You Should Spend
A preapproval answers one question: how much is a lender willing to risk on you? It doesn't answer whether the payment fits your life.
The classic first-time buyer mistake is treating the preapproval ceiling as a target. Buyers who do it end up house-rich and cash-poor, with no emergency fund and no room to absorb a water heater failure. Homeownership converts a landlord problem into your problem, and that transfer has a monthly cost.
A more useful approach is to work backward from your real budget. Decide what you're willing to spend on housing after retirement contributions, childcare, and a monthly maintenance reserve, then shop to that number. If it lands under your approval amount, good. That difference is your margin.
If you're still weighing whether to buy at all, renting vs buying a home in 2026 runs the comparison honestly rather than assuming buying always wins.
Everything Inside a Monthly Payment
Principal and interest is the number every online calculator shows you. It's also the smallest version of the truth.
Your full monthly cost includes:
Property taxes. Set by your county and reassessed over time. Rates vary enormously by state and even by district within a state.
Homeowners insurance. Required by every lender. Premiums have moved sharply in storm-exposed and wildfire-exposed markets.
Mortgage insurance. FHA charges MIP, which generally lasts the life of the loan at low down payments. Conventional PMI can be removed once you've built enough equity.
HOA dues. If the property has an association, this is a non-negotiable monthly cost that can rise with no vote from you.
Maintenance. Not in the mortgage payment, but it's now yours. Roofs, HVAC systems, and appliances all fail eventually.
Utilities. Often higher than in a rental, especially if you're moving from an apartment to a single-family home.
The MIP versus PMI distinction deserves a second look because it changes long-run cost. If your credit qualifies you for both a 3.5% down FHA loan and a 3% down conventional loan, the conventional option can be cheaper over time purely because the insurance comes off. First-time home buyer loans compared across FHA, conventional, VA, and USDA breaks down when each one wins.
An Affordability Table by Income
Here is the 28/36 rule applied across common income levels. These are ceilings, not targets.
Annual Gross Income | Gross Monthly Income | Max Housing Cost at 28% | Max Total Debt at 36% | Left for Other Debt |
$50,000 | $4,167 | $1,167 | $1,500 | $333 |
$65,000 | $5,417 | $1,517 | $1,950 | $433 |
$80,000 | $6,667 | $1,867 | $2,400 | $533 |
$95,000 | $7,917 | $2,217 | $2,850 | $633 |
$110,000 | $9,167 | $2,567 | $3,300 | $733 |
$125,000 | $10,417 | $2,917 | $3,750 | $833 |
Notice how thin the last column is. At $65,000 a year you have $433 a month for every non-housing debt payment you carry. A single average car loan can consume all of it.
The table deliberately stops at monthly housing cost rather than converting to a home price. That conversion depends on your interest rate, down payment, local property tax rate, and insurance premium, and those four inputs swing the answer by a wide margin between markets. Get a real quote for your zip code before you anchor on a price.
Your Credit Score Changes the Answer
Your score doesn't change the 28% rule. It changes how much house that 28% buys, because it sets your interest rate.
FICO Score Range | Rate | Monthly Payment |
760 and above | 6.63% | $1,922 |
740 to 759 | 6.71% | $1,938 |
720 to 739 | 6.81% | $1,958 |
700 to 719 | 6.89% | $1,974 |
680 to 699 | 6.98% | $1,992 |
660 to 679 | 7.07% | $2,010 |
640 to 659 | 7.17% | $2,030 |
620 to 639 | 7.33% | $2,063 |
Rate data from Experian's average mortgage rates by credit score, Curinos, July 2026. Principal and interest on a $300,000 thirty-year fixed loan.
The spread between the top and bottom row is about $141 a month and roughly $50,700 in total interest over thirty years. Read that as buying power: the borrower at 760 can carry a meaningfully larger loan at the same monthly cost as the borrower at 620.
If your score is close to a tier boundary, waiting a few months to cross it can be worth more than anything you negotiate at the closing table. Start with what credit score you need to buy a house and credit utilization and how to lower it, since myFICO puts utilization at 30% of your score and it's the fastest lever to move. Roots Growth bundles rent reporting and credit monitoring so you can watch the tier change happen.
Use Your Rent Number as a Starting Point
You already know how to run this calculation, because you ran it the last time you signed a lease.
The renter version of the rule is that housing should stay near 30% of gross income, and landlords typically want to see income of 2.5 to 3 times monthly rent plus a credit score around 620. The buyer version is stricter at 28%, and for a good reason: rent is a ceiling on your housing cost while a mortgage payment is a floor. Repairs sit on top of it.
So take the number from how much rent can I afford and the renter income rule explained, then subtract a maintenance reserve before you treat it as your mortgage budget. If your current rent already strains you, a mortgage at the same payment will strain you more.
One offset works in the other direction. Down payment assistance can raise your effective down payment, which lowers the loan amount and the monthly payment. Across roughly 2,624 programs nationally the average benefit is about $18,000.
Run the Numbers Before You Shop
The order that works is boring and effective. Pull your credit. Pay down revolving balances. Get a written preapproval. Then build your own budget number and shop below the approval, not at it.
According to the Consumer Financial Protection Bureau, buyers who collect loan estimates from several lenders and compare them side by side routinely save money over the life of the loan, so make more than one call before you pick a rate.
That's the idea behind Roots Growth. For $10 a month, members complete short financial education challenges, earn Investable Rewards™, and deploy those rewards into the Roots real estate fund, credit repair, home-purchase services, and other Growth Market partners. Rent reporting, credit monitoring, and Rooty, your AI Wealth Coach, are all part of the toolkit.
If you're twelve to twenty-four months out, from renter to homeowner and how to get mortgage-ready while you rent lays out the timeline month by month.
Build toward your number with Roots Growth →
Frequently Asked Questions About Home Affordability
What is the 28/36 rule?
It's the standard affordability guideline lenders and financial planners use. Total monthly housing costs should stay at or below 28% of your gross monthly income, and all monthly debt payments combined, housing included, should stay at or below 36%. The 28% figure covers principal, interest, property taxes, insurance, mortgage insurance, and HOA dues, not just the loan payment.
How much house can I afford on a $60,000 salary?
A $60,000 salary is $5,000 of gross monthly income. Under the 28% guideline that supports about $1,400 a month in total housing costs, and the 36% guideline caps all your debt payments at $1,800 a month combined. The home price that translates to depends on your interest rate, down payment, property tax rate, and insurance cost in your specific market. Down payment assistance can improve two of those four inputs, and a stronger credit file improves the rate, which is what Roots Growth helps renters do.
Should I spend the full amount I am approved for?
Usually not. A preapproval reflects what a lender is willing to risk based on your gross income and reported debts. It doesn't know about childcare, retirement contributions, medical costs, or your savings goals. Many buyers are more comfortable targeting somewhere below their maximum approval.
What debt-to-income ratio do lenders want?
Lenders look at two ratios. The front-end ratio is housing cost divided by gross monthly income, and the guideline is 28%. The back-end ratio is all monthly debt payments divided by gross monthly income, and the guideline is 36%. Some loan programs allow higher back-end ratios with compensating factors like strong credit or larger reserves.
What is included in a monthly mortgage payment?
Principal and interest are only part of it. Your full monthly housing cost also includes property taxes, homeowners insurance, mortgage insurance if your down payment is small, and HOA dues if the property has an association. Maintenance and utilities aren't in the mortgage payment but they're real monthly costs you now carry alone.
Does my credit score change how much house I can afford?
Yes, through the interest rate. On a $300,000 thirty-year loan in July 2026, a borrower at 760 or above pays about $1,922 a month while a borrower at 620 to 639 pays about $2,063. That $141 monthly difference is roughly $50,700 in extra interest across the life of the loan, and it directly reduces the price range you can support. What credit score you need to buy a house covers the tiers, and Roots Growth reports your rent to the bureaus so your score keeps moving while you save.
Is mortgage insurance permanent?
It depends on the loan. FHA mortgage insurance generally lasts the life of the loan when you make a low down payment, which usually means refinancing later to remove it. Conventional PMI can be removed once you've built sufficient equity, which is one reason a 3% conventional loan can beat a 3.5% FHA loan when your credit qualifies for both. First-time home buyer loans compared across FHA, conventional, VA, and USDA shows when each one wins.
About Roots Growth
Roots Growth is a micro-learning platform that helps renters turn financial education into actual wealth. When users complete short challenges they earn reward points that can be directly invested into real estate or used toward home-buying services. Roots Growth also has powerful credit-building tools, like rent reporting and real time credit monitoring. Ready to grow? Join the 29,500+ investors already building wealth today at investwithroots.com.
Disclosure: This content is for informational purposes only and does not constitute financial or legal advice.
Last Updated: July 2026
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