# 7 Steps to Calculate How Much House You Can Afford in 2026 By Opendoor Editorial Team | 2025-11-04 > 7 Steps to Calculate How Much House You Can Afford Figuring out how much house you can afford comes down to a simple formula: compare your gross monthly income against your existing debts, apply standard lender ratios like the 28/36 rule, and factor in your down payment and ongoing homeownership costs. Most financial experts and mortgage lenders agree that your total housing payment should not exceed 28% of your gross monthly income — and your total debt load should stay below 36%. Here are the seven steps to calculate your home affordability: 1. Determine your gross monthly income 2. Calculate your total monthly debts 3. Calculate your debt-to-income ratio (DTI) 4. Apply the 28/36 rule 5. Factor in your down payment 6. Account for additional homeownership costs 7. Get pre-approved to confirm your budget Whether you're a first-time buyer or moving into your next home, these steps to buy a house start with affordability — knowing your real numbers before you ever tour a listing. Let's walk through each step with real numbers so you can set a confident home-buying budget. > **Want a quick answer?** Use our affordability framework below to calculate your numbers by hand — or jump straight to learning [how much it costs to buy a house](https://www.opendoor.com/articles/how-much-does-it-cost-to-buy-a-house) for a broader cost breakdown. [Get your offer](#) ## Step 1 — Determine Your Gross Monthly Income Your gross monthly income is the total amount you earn before taxes, health insurance premiums, and retirement contributions are deducted. This is the number lenders use to evaluate your mortgage application — not your take-home pay. To calculate it, add up all qualifying income sources: - **Base salary or wages:** Divide your annual salary by 12. A $78,000 annual salary equals $6,500 per month gross. - **Bonuses and commissions:** Lenders typically average the last two years of bonus or commission income. If you earned $6,000 in bonuses last year and $8,000 the year before, your monthly bonus income is approximately $583. - **Side income or freelance work:** If you can document it on tax returns for at least two years, lenders will usually count it. - **Rental income:** If you own investment property, most lenders count [75% of your gross rental income](https://selling-guide.fanniemae.com/sel/b3-3.1-09/other-sources-income) to account for vacancies and maintenance. - **Alimony or child support received:** Counts if you can document at least six months of consistent payments. **Example:** Sarah earns $72,000/year in salary, averages $4,800/year in freelance income, and receives no other income. | **Income Source** | **Annual** | **Monthly** | | Salary | $72,000 | $6,000 | | Freelance income | $4,800 | $400 | | **Total gross monthly income** | **$76,800** | **$6,400** | **Gross vs. net — why it matters:** Your net (take-home) pay might be $4,800/month after deductions, but lenders qualify you based on the $6,400 gross figure. This is an important distinction because it means your approved mortgage payment may feel like a larger share of your actual paycheck than the ratios suggest. ## Step 2 — Calculate Your Total Monthly Debts Next, add up every recurring monthly debt obligation. Lenders look at minimum required payments — not your total balances — when assessing affordability. Common debt categories to include: - **Student loans:** Monthly minimum payment (or income-driven repayment amount) - **Auto loans or leases:** Monthly payment - **Credit card minimums:** The minimum payment due, not your typical payment - **Personal loans:** Monthly payment - **Child support or alimony paid:** Court-ordered monthly amount - **Other installment loans:** Furniture financing, medical payment plans, etc. **Do not include** in this calculation: rent (which will be replaced by your mortgage), utilities, groceries, subscriptions, or insurance premiums outside of housing. **Example:** Using Sarah's finances: | **Debt Category** | **Monthly Payment** | | Student loans | $320 | | Auto loan | $410 | | Credit card minimums | $85 | | Personal loan | $0 | | **Total monthly debts** | **$815** | Write down this number. You'll need it for the next step. ## Step 3 — Calculate Your Debt-to-Income Ratio Your debt-to-income ratio (DTI) is the single most important number lenders use to determine how much mortgage you can handle. It tells them what percentage of your gross income is already committed to debt — and how much room is left for a housing payment. ### What Is Debt-to-Income Ratio (DTI)? DTI is expressed as a percentage and calculated with a simple formula: **DTI = (Total Monthly Debt Payments ÷ Gross Monthly Income) × 100** There are actually two types of DTI that lenders evaluate: - **Front-end DTI (housing ratio):** Only your proposed housing costs (mortgage principal, interest, taxes, insurance) divided by gross income. - **Back-end DTI (total debt ratio):** All monthly debts including the proposed housing payment divided by gross income. This is the number most lenders focus on. **Worked example:** Sarah has $815 in monthly debt payments and $6,400 in gross monthly income. **Current DTI (before mortgage):** ($815 ÷ $6,400) × 100 = **12.7%** This means Sarah has significant room for a housing payment. If a lender allows up to 43% back-end DTI, she could theoretically take on up to $1,937/month in housing costs ($6,400 × 0.43 = $2,752 total debt capacity, minus $815 existing debt = $1,937). ### DTI Thresholds by Loan Type Different mortgage programs have different DTI limits. Here's what major loan types typically require, according to guidelines from [Fannie Mae](https://selling-guide.fanniemae.com/sel/b3-6-02/debt-income-ratios), [FHA](https://www.hud.gov/program_offices/housing/sfh/ins/203b--baseline), and the [VA](https://www.va.gov/housing-assistance/home-loans/): | **Loan Type** | **Typical Max Back-End DTI** | **Notes** | | Conventional (Fannie/Freddie) | 36%–45% | Up to 50% with strong compensating factors (high credit score, large reserves) | | FHA | 43% | May go to 50% with compensating factors | | VA | 41% | No hard cap; 41% is a guideline, not a rule | | USDA | 41% | Stricter enforcement than VA | ### How to Lower Your DTI Before Buying If your DTI is above 40%, consider these strategies before applying for a mortgage: 1. **Pay down credit card balances.** Eliminating a $150/month minimum payment drops your DTI noticeably. This is often the fastest lever to pull. 2. **Avoid new debt.** Don't finance a car, furniture, or appliances in the months leading up to your mortgage application. 3. **Increase your income.** Documented freelance or part-time income (with two years of tax history) can boost your gross income and lower your ratio. 4. **Pay off small installment loans.** If you owe $1,200 on a personal loan with a $100/month payment, eliminating it entirely removes that line item from your DTI calculation. ## Step 4 — Apply the 28/36 Rule The 28/36 rule is the most widely used affordability guideline in mortgage lending. It gives you two guardrails for responsible home buying, and understanding it is one of the most important steps to buy a house with affordability in mind. ### The 28% Rule (Front-End Ratio) Spend no more than **28% of your gross monthly income** on total housing costs. This includes: - Mortgage principal and interest - Property taxes - Homeowners insurance - PMI (if applicable) - HOA fees (if applicable) This is sometimes called the "housing expense ratio" or "front-end ratio." ### The 36% Rule (Back-End Ratio) Spend no more than **36% of your gross monthly income** on all debt payments combined — housing costs plus student loans, auto loans, credit cards, and any other obligations. **Worked example using Sarah's $6,400/month gross income:** | **Rule** | **Calculation** | **Maximum Monthly Amount** | | 28% Rule (housing costs only) | $6,400 × 0.28 | **$1,792/month** | | 36% Rule (all debts) | $6,400 × 0.36 | **$2,304/month** | Since Sarah already pays $815/month in non-housing debt, the 36% rule limits her housing payment to $2,304 − $815 = **$1,489/month**. Notice that the 36% rule is more restrictive here than the 28% rule. **Always use the lower number** — in Sarah's case, $1,489/month is her maximum comfortable housing payment under the 28/36 framework. > **Important:** The 28/36 rule is a guideline, not a hard law. Some lenders approve borrowers at higher ratios, especially for FHA and VA loans. But just because you *can* be approved for more doesn't mean you *should* borrow more. Staying within these limits leaves room in your budget for savings, emergencies, and the ongoing costs of homeownership. ## Step 5 — Factor In Your Down Payment Your down payment directly affects how much house you can afford because it determines your loan amount, your monthly payment, and whether you'll pay private mortgage insurance (PMI). Here's how different down payment percentages play out on a $350,000 home: | **Down Payment %** | **Down Payment Amount** | **Loan Amount** | **Estimated Monthly P&I (6.5% rate, 30-year)** | **PMI Required?** | | 3% | $10,500 | $339,500 | ~$2,146 | Yes | | 5% | $17,500 | $332,500 | ~$2,102 | Yes | | 10% | $35,000 | $315,000 | ~$1,991 | Yes | | 20% | $70,000 | $280,000 | ~$1,770 | No | **Key takeaways:** - **A larger down payment lowers your monthly obligation**, making a more expensive home potentially affordable within the 28/36 rule. - **PMI typically costs 0.5%–1.5% of the loan amount annually**, according to the [Urban Institute](https://www.urban.org/urban-wire/reducing-fha-mortgage-insurance-premiums-what-are-trade-offs). On a $315,000 loan, that's roughly $131–$394/month added to your housing payment. - **You don't need 20% down to buy a home.** Conventional loans allow as little as 3% down, and FHA loans require just 3.5%. Learn more about whether [5% is enough for a down payment](https://www.opendoor.com/articles/briefs/is-5-percent-enough-down-payment) and [how much to save for a house](https://www.opendoor.com/articles/how-much-to-save-for-house). If you're also selling a current home to fund your down payment, knowing [what your home is worth](https://www.opendoor.com/articles/whats-your-home-worth-take-these-steps-to-find-out) helps you estimate your available equity. ## Step 6 — Account for Additional Homeownership Costs Your mortgage payment is only part of the true cost of owning a home. Lenders include some of these costs in your qualification ratios, but others come out of pocket. Accounting for all of them is essential to calculating an honest affordability number. ### Property Taxes Property taxes vary dramatically by location. The national average effective property tax rate is approximately [1.1% of a home's assessed value](https://www.census.gov/library/visualizations/interactive/property-tax-rate.html), but some states exceed 2%. On a $350,000 home at 1.1%, expect about **$3,850/year or $321/month**. ### Homeowners Insurance The average U.S. homeowner pays roughly [$2,377 per year for homeowners insurance](https://www.iii.org/fact-statistic/facts-statistics-homeowners-and-renters-insurance) as of recent data — approximately **$198/month**. Costs vary significantly by location, home age, and coverage level. ### PMI (Private Mortgage Insurance) If your down payment is less than 20%, your lender will require PMI. As noted above, budget $131–$394/month depending on your loan amount and credit score. PMI can be removed once you reach 20% equity. ### HOA Fees If you're buying a condo, townhome, or home in a planned community, homeowners association (HOA) fees can range from $100 to $700+ per month. These fees are included in your front-end DTI calculation by lenders. ### Maintenance and Repairs (The 1% Rule) A widely used rule of thumb: budget **1% of your home's purchase price per year** for ongoing maintenance and repairs. On a $350,000 home, that's $3,500/year or about $292/month. This covers everything from HVAC servicing to plumbing fixes to eventual roof replacement. Understanding [factors that influence home value](https://www.opendoor.com/articles/factors-that-influence-home-value) can also help you prioritize which maintenance projects matter most. **The full picture for Sarah on a $350,000 home (10% down):** | **Cost Category** | **Monthly Estimate** | | Mortgage principal & interest | $1,991 | | Property taxes | $321 | | Homeowners insurance | $198 | | PMI | ~$200 | | Maintenance reserve | $292 | | **Total monthly housing cost** | **~$3,002** | At $3,002/month, this home would push Sarah well beyond her $1,489 limit from the 28/36 rule. She'd need to either increase her down payment, lower her price target (closer to $200,000–$230,000), or reduce existing debts to make the numbers work. This is exactly why running these calculations *before* house hunting saves time and heartbreak. ## Step 7 — Get Pre-Approved to Confirm Your Budget After running your own affordability calculations, the final step is getting mortgage pre-approval from a lender. Pre-approval puts your self-assessment to the test with an official review of your finances. ### Pre-Qualification vs. Pre-Approval These terms sound similar but carry very different weight: - **Pre-qualification** is an informal estimate based on self-reported financial information. It takes minutes and involves no document verification. Useful as a starting point, but sellers and agents don't take it seriously. - **Pre-approval** involves a full application, a hard credit pull, and verification of your income, assets, and debts. You receive a conditional commitment letter stating the loan amount you're approved for. This is what sellers want to see with your offer. ### What Pre-Approval Tells You - **Your actual maximum loan amount** — which may be higher or lower than your self-calculation depending on factors like credit score and current interest rates. - **Your estimated interest rate** — which directly affects your monthly payment and total affordability. - **Any red flags** — such as credit report errors, undisclosed debts, or income documentation gaps that need to be resolved before you can close. A pre-approval letter is typically valid for 60–90 days. If you're wondering [how long the entire process takes](https://www.opendoor.com/articles/briefs/how-long-does-it-take-to-buy-a-house), pre-approval is usually the first milestone and can take anywhere from one day to two weeks depending on your lender and financial complexity. > **Pro tip:** Get pre-approved before you start touring homes. Knowing your confirmed budget prevents you from falling in love with a house you can't afford — and makes your offer stronger when you find the right one. ## Building Your Total Home-Buying Budget Calculating how much house you can afford gives you a purchase price and monthly payment. But your total home-buying budget includes several additional one-time and short-term costs that many first-time buyers overlook. ### Closing Costs Buyers typically pay [2%–5% of the purchase price in closing costs](https://www.consumerfinance.gov/ask-cfpb/what-are-closing-costs-en-1845/), which include lender fees, title insurance, appraisal fees, and prepaid taxes and insurance. On a $300,000 home, that's $6,000–$15,000 due at closing. In some markets, you may be able to negotiate [seller concessions](https://www.opendoor.com/articles/what-are-seller-concessions) to offset a portion of these costs. You should also understand [how long closing takes](https://www.opendoor.com/articles/how-long-does-closing-take) so you can plan your timeline and cash flow accordingly. ### Home Inspection A home inspection typically costs **$300–$500** depending on home size and location, and it is almost always paid out of pocket before closing. It's one of the most important investments you'll make. Review a [home inspection checklist for buyers](https://www.opendoor.com/articles/home-inspection-checklist-for-buyers) so you know what to expect, and learn [what home inspectors look for](https://www.opendoor.com/articles/briefs/what-do-home-inspectors-look-for) during the process. ### Moving Costs A local move averages $1,400–$2,500, while a long-distance move can run $4,000–$10,000+ depending on distance, volume, and timing. ### Immediate Repairs and Furnishing Budget a cushion for day-one needs: changing locks, minor repairs flagged by the inspector, window coverings, and basic furniture or appliances the seller didn't leave behind. ### Emergency Fund Financial advisors recommend maintaining **3–6 months of total housing payments** in liquid savings after you close. If your total monthly housing cost is $2,000, that means keeping $6,000–$12,000 accessible for unexpected repairs or income disruptions. **Sample total upfront budget for a $300,000 home (10% down):** | **Expense** | **Estimated Cost** | | Down payment (10%) | $30,000 | | Closing costs (3%) | $9,000 | | Home inspection | $400 | | Moving costs | $2,000 | | Immediate repairs/furnishing | $2,500 | | Emergency fund (3 months) | $7,500 | | **Total cash needed** | **~$51,400** | Knowing this full number early prevents the common mistake of spending your entire savings on the down payment and arriving at your new home financially stretched. For a deeper look at all purchase costs, see our guide on [how much it costs to buy a house](https://www.opendoor.com/articles/how-much-does-it-cost-to-buy-a-house). ## From Affordability to Action: Your Next Steps You've calculated your income, debts, DTI, and total budget. Now it's time to turn those numbers into a home purchase. Here are the steps to buy a house once your affordability picture is clear: 1. **Get pre-approved.** Bring your calculations to a lender and confirm your budget with an official pre-approval letter. Apply with two or three lenders to compare rates. 2. **Set your search criteria.** Use your maximum affordable home price, preferred down payment, and target monthly payment to filter listings by price range and location. 3. **Start exploring homes.** Browse listings online, attend [open houses](https://www.opendoor.com/articles/open-house-tips-for-first-time-buyers), and schedule tours. If you find a home you love, knowing [how to determine what to offer](https://www.opendoor.com/articles/how-to-determine-what-to-offer-on-a-house) will help you submit a competitive bid within your budget. 4. **Consider selling your current home first.** If you're a current homeowner, your sale proceeds may fund your down payment. Understanding [how much your house is worth](https://www.opendoor.com/articles/how-much-is-my-house-worth-7-ways-to-find-out-your-homes-value) and exploring options to [sell your house fast](https://www.opendoor.com/articles/how-to-sell-your-house-fast-complete-guide) can give you a clearer picture of available equity — and whether you can time the buy and sell to avoid carrying two mortgages. 5. **Familiarize yourself with the process.** Brush up on [key real estate terms](https://www.opendoor.com/articles/real-estate-terms-you-should-know) so you understand every document and milestone from contract to keys. Know what it means when a home is [under contract](https://www.opendoor.com/articles/under-contract-meaning) and the difference between [contingent and pending](https://www.opendoor.com/articles/contingent-vs-pending) status. The gap between calculating affordability and actually closing on a home is smaller than most people think — especially when you've already done the hard work of knowing your numbers. [Get your offer](#) ## Frequently Asked Questions **How much house can I afford on a $50,000 salary?** On a $50,000 annual salary ($4,167/month gross), the 28% rule puts your maximum housing payment at about $1,167/month. Assuming a 6.5% interest rate, 30-year term, and 10% down, that roughly translates to a home in the $160,000–$185,000 range — depending on property taxes, insurance, and your existing debts. **What is a good debt-to-income ratio for buying a house?** Most lenders prefer a back-end DTI of 36% or lower for conventional loans. You can qualify with a DTI up to 43%–50% depending on the loan type and your credit profile, but a lower DTI gives you more financial breathing room and often qualifies you for better interest rates. **How do I calculate my mortgage affordability?** Add up your gross monthly income, calculate your DTI, and apply the 28/36 rule. Your maximum affordable housing payment is the lower of 28% of gross income or 36% of gross income minus existing debts. From there, work backward using current mortgage rates to find your maximum purchase price. **What percentage of income should go to a mortgage?** The standard recommendation is no more than 28% of your gross monthly income on housing costs (principal, interest, taxes, insurance). Some buyers in high-cost markets stretch to 30%–33%, but exceeding 28% means less buffer for savings and unexpected expenses. **Does my down payment affect how much house I can afford?** Yes, significantly. A larger down payment reduces your loan amount, lowers your monthly payment, and can eliminate PMI — all of which mean you can afford a higher purchase price within the same monthly budget. Even the difference between [5% and 20% down](https://www.opendoor.com/articles/briefs/is-5-percent-enough-down-payment) can shift your affordable price range by tens of thousands of dollars. **What's the difference between pre-qualification and pre-approval?** Pre-qualification is an informal estimate based on unverified financial information. Pre-approval involves a full application, document verification, and a hard credit pull, resulting in a conditional commitment letter. Sellers strongly prefer offers backed by pre-approval. **How much cash do I need beyond the down payment?** Plan for closing costs (2%–5% of the purchase price), a home inspection ($300–$500), moving expenses, and an emergency reserve of 3–6 months of housing payments. A realistic total is often 8%–15% of the purchase price beyond your down payment. **Should I buy the most expensive house I'm approved for?** Generally, no. Lender approval reflects the maximum debt you can theoretically service — not the amount that leaves you financially comfortable. Many financial planners recommend targeting a home price 10%–20% below your maximum approval to maintain flexibility for savings, lifestyle spending, and the inevitable surprise repair costs that come with homeownership. --- *Originally published at [https://www.opendoor.com/articles/7-steps-to-calculate-how-much-house-you-can-afford](https://www.opendoor.com/articles/7-steps-to-calculate-how-much-house-you-can-afford)*