How Much House Can I Afford? A First-Time Buyer’s Guide

Published Jan 20, 2025 · 7 min read

Buying a home is the largest financial decision most people ever make. Before you start browsing listings, you need to answer one critical question: how much can you actually afford?

The 28/36 Rule: Your Starting Point

Lenders use the 28/36 rule to determine how much you can borrow:

• 28% Front-End Ratio: Your total housing costs (mortgage payment, property taxes, homeowner’s insurance, HOA) should not exceed 28% of your gross monthly income.
• 36% Back-End Ratio: Your total monthly debt payments (housing + car loans + student loans + credit cards + other debt) should not exceed 36% of your gross monthly income.

Quick Example

If your household income is $85,000/year ($7,083/month gross):

If you already have $400/month in car and student loan payments, your maximum housing cost is $2,550 − $400 = $2,150/month. The binding constraint is whichever amount is lower, so in this case the 28% rule ($1,983) wins.

From Monthly Payment to Home Price

Working backward from a $1,983 monthly budget:

• Property taxes: ~$300/month (varies by location)
• Homeowner’s insurance: ~$125/month
• PMI (if <20% down): ~$100/month
• Remaining for mortgage P&I: $1,983 − $525 = $1,458/month

At a 6.5% rate on a 30-year mortgage, $1,458/month supports roughly a $230,000 loan. With a 10% down payment, that means a home price of about $255,000.

Use our Mortgage Calculator to plug in your exact numbers.

The Down Payment Question

There’s no universally “right” down payment. The best choice depends on your local market, savings rate, and risk tolerance. The key is to not drain your emergency fund to hit 20%.

Hidden Costs Most Buyers Forget

The purchase price is just the beginning. Budget for these often-overlooked costs:

Upfront Costs

• Closing costs: 2–5% of the loan amount (appraisal, title insurance, origination fees, inspections)
• Moving expenses: $1,000–$5,000+
• Immediate repairs/updates: Budget at least $2,000–$5,000

Ongoing Costs

• Maintenance: Budget 1–2% of home value per year ($3,000–$6,000 for a $300K home)
• Utilities: Typically higher than renting ($200–$400/month)
• HOA fees: $100–$500/month if applicable
• Property tax increases: Usually assessed annually, can rise

Rent vs. Buy: When Does Buying Make Sense?

Buying makes financial sense when you plan to stay at least 5–7 years. In the early years of a mortgage, most of your payment goes to interest. It takes time to build enough equity to offset the transaction costs of buying and eventually selling.

Steps to Prepare for Buying

1. Check your credit score. A score above 740 gets the best mortgage rates. Between 620–739 is acceptable but costs more in interest.
2. Pay down high-interest debt. This improves your debt-to-income ratio and credit score.
3. Save for down payment + closing costs + reserves. Aim for at least 3 months of housing costs in reserve after closing.
4. Get pre-approved. A pre-approval letter shows sellers you’re serious and gives you a concrete budget.
5. Stay within your budget. The bank’s pre-approval limit is the maximum — not a target. Buy below your max to keep financial flexibility.

Common Mistakes to Avoid

• Maxing out your budget: Just because you qualify for $400K doesn’t mean you should spend $400K.
• Forgetting about taxes: A $300K home with 2% property tax costs $500/month in taxes alone.
• Skipping the inspection: A $400 inspection can save you from a $40,000 foundation problem.
• Draining savings for the down payment: Keep an emergency fund. Unexpected costs will come.
• Ignoring insurance costs: Flood zones and high-risk areas can add $1,000–$3,000/year.

Key Takeaways

• Use the 28/36 rule as a starting framework, then adjust for your lifestyle and goals.
• The true cost of homeownership is 30–50% more than just the mortgage payment.
• A larger down payment saves money long-term but isn’t always worth depleting your savings.
• Buy less house than you can afford — you’ll thank yourself in 5 years.