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Mortgages and Home Buying: What You Can Afford and What It Costs

A mortgage is a loan secured by the home you buy, usually repaid over 15 or 30 years. When you are buying a home, lenders weigh your income, debts, credit score and down payment. A common guideline keeps housing costs at or below 28% of gross monthly income and all debt payments at or below 36%. On a conventional loan with less than 20% down, you usually pay private mortgage insurance (PMI) until you have built enough equity.

By the numbers

Key mortgage figures

30-year fixed mortgage rate
7.40%
National average, week of Oct 8, 2026.
Source: Freddie Mac PMMS, via FRED
Payment on a $300,000 loan
$2,077 a month
Principal and interest over 30 years at the 7.40% average rate above. Taxes and insurance come on top.
Source: Coinscribed Mortgage Calculator
Income needed to buy a typical home
$68,411 to $387,703
From Pittsburgh to San Jose, across 50 metro areas, with 20% down at a 7.28% rate.
Source: Coinscribed Home Affordability Index
When PMI ends
78% of the original value
On a conventional loan, PMI must end automatically when the balance is scheduled to reach it, if you are current on payments. You can ask at 80%.
Source: CFPB, when can I remove PMI
What to know

Mortgages: the essentials

Affordability starts with the 28/36 rule

Lenders look at your debt-to-income ratio. Keeping the full housing payment, taxes and insurance included, near 28% of gross income leaves room for everything else.

How Much House Can I Afford? A Salary-by-Salary Guide

The payment is more than principal and interest

Property taxes, homeowners insurance, PMI and any HOA dues can add hundreds of dollars a month to the principal-and-interest figure a basic calculator shows.

What's the Monthly Payment on a $300K, $400K, or $500K Mortgage?

You do not need 20% down, but it changes the cost

Plenty of buyers put down less than 20%. On a conventional loan the trade-off is PMI and a bigger balance, so the real question is how much a larger down payment saves you.

How to Save for a Down Payment on a House (A Realistic Plan)

PMI is not permanent

On a conventional loan you can ask to cancel PMI once you reach 80% of the home’s original value, and it has to end at 78%. Extra principal payments get you there sooner.

How to Get Rid of PMI: 6 Ways to Stop Paying Mortgage Insurance

Guides

Every mortgage guide

How Much House Can I Afford? A Salary-by-Salary Guide

How much house you can afford comes down to your income, debts, and down payment - not just the sticker price. Here's a clear, salary-by-salary guide, the 28/36 rule, and the real costs most buyers forget.

Varun Attri5 min read
Glossary

Key terms

28/36 rule
The 28/36 rule is a lending guideline that keeps total monthly housing costs at or below 28% of gross monthly income and all monthly debt payments at or below 36%.
Debt-to-income ratio (DTI)
Debt-to-income ratio is the share of your gross monthly income that goes toward monthly debt payments, expressed as a percentage.
Down payment
A down payment is the upfront portion of a purchase price you pay in cash, with the remainder covered by a loan.
PMI (private mortgage insurance)
PMI, or private mortgage insurance, is an added monthly cost lenders require on a conventional mortgage when the down payment is less than 20%, and it protects the lender rather than the borrower.
Escrow
Escrow is an arrangement where a neutral third party holds money on behalf of others, most often a mortgage escrow account that collects and pays your property taxes and homeowners insurance.
Closing costs
Closing costs are the one-time fees due when a property purchase or refinance is finalised, covering items such as lender fees, title work, appraisal and recording.
Home equity
Home equity is the portion of your property you own outright, calculated as the home’s current market value minus the balance you still owe on it.
Amortization
Amortization is the process of repaying a loan through scheduled payments where each payment covers the interest due plus a portion of the principal.