House Affordability Calculator
How much home can you afford? ยท Income-based DTI ยท Monthly budget ยท Conventional ยท FHA ยท VA loans
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๐ Enter your income or budget details on the left to find out how much home you can afford.
How Much House Can You Afford?
Lenders use two primary methods to determine how much mortgage you qualify for. This calculator supports both:
- Income-based (DTI method): Compare your monthly housing costs and total debt payments to your gross monthly income. The result is your Debt-to-Income (DTI) ratio, which lenders use to assess risk.
- Budget-based: Work backward from a fixed monthly amount you can allocate to all housing costs, and find the maximum home price that fits.
The Two DTI Ratios
Lenders calculate two ratios for conventional mortgage applications:
Front-End Ratio = Monthly Housing Costs รท Gross Monthly Income
Housing costs = P&I + property tax + insurance + PMI + HOA
Back-End Ratio = (Housing + All Debts) รท Gross Monthly Income
All debts = housing + car loans + student loans + credit card minimums
For a household earning $10,000/month gross with $500/month in car/student loan payments, and targeting a $2,240 housing payment:
- Front-end: $2,240 รท $10,000 = 22.4% โ (below 28% limit)
- Back-end: ($2,240 + $500) รท $10,000 = 27.4% โ (below 36% limit)
These are qualification guidelines, not hard caps. Lenders can approve loans outside these ratios with compensating factors - large down payment, strong credit, significant reserves, or stable employment history.
Loan Types: Conventional, FHA, VA, USDA
Conventional
28% / 36% DTI
Min 3-5% down, 620+ credit. No mortgage insurance with 20% down. Best rates for strong borrowers.
FHA Loan
31% / 43% DTI
3.5% down with 580+ credit. Government-insured. Requires MIP (mortgage insurance premium). Good for first-time buyers.
VA Loan
41% back-end
0% down for eligible veterans & active duty. No PMI. Funding fee applies. Often the best loan available.
USDA Loan
29% / 41% DTI
0% down in eligible rural and suburban areas. Income limits apply. Low guarantee fee vs PMI.
Jumbo Loan
36-43% DTI
For homes above conforming limit ($766,550 in 2026). Requires 10-20% down, 700+ credit, large cash reserves.
ARM Loans
varies
Adjustable-rate mortgages start lower but reset periodically. Good for buyers planning to sell or refinance within 5-7 years.
The True Cost of Homeownership: Beyond the Mortgage
A common mistake first-time buyers make is budgeting only for the principal and interest payment. The full monthly housing cost (PITI + extras) is typically 30-50% higher than the bare P&I payment. Here are all the costs to include:
Required Monthly Costs (PITI)
- Principal (P): The portion of your payment that reduces the loan balance. Starts small on a 30-year loan but grows each month.
- Interest (I): The lender's fee, charged monthly on the outstanding balance. For a $320,000 loan at 6.57%, the first month's interest alone is ~$1,752.
- Property Taxes (T): Typically collected monthly via escrow and paid annually to local government. US average: ~1.1% of home value per year ($3,520/year on a $320,000 home).
- Insurance (I): Homeowner's insurance is required by lenders. US average: ~$1,500-$2,000/year. PMI (Private Mortgage Insurance) is also required if your down payment is below 20% - typically 0.5-1.5% of loan value per year.
Additional Recurring Costs
| Cost | Typical Annual Amount | Monthly Equivalent | Notes |
|---|---|---|---|
| Property Tax | 1.1% of home value | $275-$550/mo on $300K | Varies widely by state/county |
| Homeowner's Insurance | $1,200-$2,400 | $100-$200/mo | Higher in disaster-prone areas |
| PMI | 0.5-1.5% of loan | $100-$250/mo per $200K loan | Required if <20% down |
| HOA Fees | $0-$6,000+ | $0-$500+/mo | Condos often $400-$800/mo |
| Maintenance & Repairs | 1-2% of home value | $250-$500/mo on $300K | Often overlooked; budget carefully |
| Utilities | $2,400-$4,800 | $200-$400/mo |
The 1% rule for maintenance: Budget at least 1% of your home's purchase price per year for maintenance and repairs. On a $350,000 home, that's $3,500/year ($292/month). Older homes may require 2%+. This is one of the most overlooked costs in home affordability calculations.
Down Payment: How Much Do You Really Need?
Down payment requirements vary significantly by loan type. Here are the minimums and the practical implications of each level:
| Down Payment | Loan Type | PMI Required? | On $350,000 Home |
|---|---|---|---|
| 0% | VA, USDA | No | $0 down |
| 3% | Conventional (HomeReady) | Yes | $10,500 |
| 3.5% | FHA (580+ credit) | Yes (MIP) | $12,250 |
| 5% | Conventional | Yes | $17,500 |
| 10% | Conventional | Yes | $35,000 |
| 20% | Conventional | No | $70,000 |
| 25%+ | Jumbo | No | $87,500+ |
The PMI Calculation
If you put down less than 20%, PMI adds 0.5-1.5% of the loan amount per year. On a $280,000 loan at 0.8% PMI, that's $2,240/year ($187/month) - money that builds no equity. Under the Homeowners Protection Act, PMI is automatically cancelled when your loan balance reaches 78% of the original purchase price.
Piggyback loan (80/10/10): Some buyers avoid PMI by taking a second mortgage for 10% of the purchase price, putting 10% down, and financing 80% with the first mortgage. This can be cost-effective if the second loan's rate is competitive, but adds complexity.
Improving Your Affordability: Practical Strategies
1. Improve Your Credit Score
Your credit score affects both whether you qualify and what rate you receive. A 50-point improvement can reduce your mortgage rate by 0.25-0.5%, saving $30,000+ on a 30-year loan. Strategies:
- Pay all bills on time for 12+ months before applying
- Reduce credit card balances to under 30% of credit limits
- Don't open new credit accounts within 6 months of applying
- Dispute any errors on your credit report (free at AnnualCreditReport.com)
2. Reduce Your Debt-to-Income Ratio
Every $100 you eliminate from monthly debt payments increases your mortgage affordability by roughly $20,000. Strategies:
- Pay off car loans before applying
- Pay down student loans to lower minimum payments
- Consolidate or pay off credit card balances
- Avoid taking on new debt (no new cars, no large purchases on credit)
3. Save a Larger Down Payment
A larger down payment reduces the loan amount, eliminates or reduces PMI, lowers monthly payments, and may qualify you for better rates. It also demonstrates financial discipline to lenders, improving your application.
4. Consider a Longer Loan Term
A 30-year mortgage has lower monthly payments than a 15-year mortgage on the same amount, improving front-end DTI. However, total interest paid is significantly higher. Use the monthly budget mode to see how term affects maximum home price.
5. First-Time Buyer Programs
Many state and local governments offer down payment assistance, closing cost grants, and below-market rate loans for first-time buyers. Income limits often apply. Check your state's housing finance agency website for current programs.
The Home Buying Process: Step by Step
- Check your credit and finances (3-12 months before buying): Pull your credit reports, check your score, calculate your DTI, and assess how much you can save for a down payment. If your score is below 620, work on improving it before proceeding.
- Get pre-approved (1-2 months before shopping): A pre-approval letter shows sellers you're serious and gives you a precise budget. It requires a hard credit inquiry, income verification, and asset documentation. Get pre-approved from 2-3 lenders to compare rates and terms.
- Determine your budget: Use this calculator to establish your maximum home price, then work backward to your comfortable price range. Lenders will tell you what you qualify for, but that's often more than is financially prudent. Target a home payment that leaves room for savings and unexpected expenses.
- Find a real estate agent: A buyer's agent costs you nothing (paid by the seller) and provides market expertise, negotiation skills, and transaction management. Interview 2-3 agents before committing.
- Shop and make an offer: Look at homes in your price range and neighborhood priority areas. When you find a target, research comparable sales (comps) to determine a fair offer price. Negotiate contingencies: inspection, financing, appraisal.
- Under contract: inspections and appraisals: A professional home inspection ($400-$700) identifies issues before you're legally committed. The bank will require an appraisal to confirm the home's value supports the loan amount.
- Final mortgage approval and closing: Your lender processes the full mortgage application, verifies all documents, and issues a "clear to close." Closing day involves signing dozens of documents and paying closing costs (typically 2-5% of the loan amount, or $6,400-$16,000 on a $320,000 loan).
Total cash needed at closing: Down payment + closing costs + 2-3 months mortgage reserves (many lenders require this). On a $350,000 home with 10% down: $35,000 + $8,750 closing costs + $7,500 reserves = approximately $51,250 liquid cash needed at closing.
Rent vs. Buy: The Full Financial Analysis
The decision to rent or buy depends on many factors beyond the simple monthly payment comparison:
Financial Arguments for Buying
- Equity building: Each mortgage payment builds ownership stake in an appreciating asset. Over 30 years, US home values have averaged ~3-4% annual appreciation.
- Inflation hedge: A fixed-rate mortgage locks in your housing cost - your payment in 2056 is the same nominal dollars as in 2026, while rental prices historically rise with inflation.
- Tax advantages: Mortgage interest and property taxes are deductible if you itemize (declining benefit for most due to the standard deduction).
- Stability: No risk of rent increases or landlord deciding to sell.
Financial Arguments for Renting
- Flexibility: Moving for a job, relationship change, or lifestyle shift is far easier without property ownership.
- No maintenance risk: A major repair (roof, HVAC, plumbing) is the landlord's problem, not yours.
- Opportunity cost: A 20% down payment of $70,000 invested in a diversified portfolio at 7% grows to ~$267,000 in 20 years. This is the "opportunity cost" of homeownership.
- Transaction costs: Buying and selling a home costs 8-10% of the home value in combined agent commissions, closing costs, and fees. Short time horizons (under 3-5 years) make buying financially risky.
Price-to-Rent Ratio: Divide the home purchase price by the annual rent for a comparable home. Below 15 = likely better to buy. 15-20 = neutral. Above 20 = often better to rent. In expensive cities (NYC, SF), ratios often exceed 30.
Frequently Asked Questions
How much house can I afford on a $100,000 salary?
On $100,000/year ($8,333/month gross), using the 28% front-end rule: max housing payment = $2,333/month. With 20% down at 6.57% for 30 years, this corresponds to a maximum home price of roughly $375,000-$390,000 after accounting for taxes and insurance. With significant existing debts, the 36% back-end rule may lower this. Use the calculator above for your exact situation.
What is a good DTI ratio for a mortgage?
For conventional loans, target front-end DTI below 28% and back-end DTI below 36%. FHA allows up to 31%/43%. Below 36% total DTI is considered "good" by most lenders. Below 20% total DTI is "excellent" and may qualify you for the best rates. Above 43% makes it difficult to qualify for any qualified mortgage.
How long should I save before buying a house?
Most buyers need 12-24 months to prepare financially. Key milestones: (1) Credit score 620+ (ideally 740+). (2) 3-20% down payment saved. (3) 2-5% closing costs saved. (4) 2-3 months of mortgage payments in reserves. (5) Stable employment for 2+ years. (6) DTI in acceptable range. Starting early on credit improvement and dedicated savings accelerates readiness significantly.
Does the affordability calculator account for closing costs?
This calculator shows the maximum home price based on recurring monthly costs and DTI ratios. It does not include one-time closing costs (typically 2-5% of the loan). When planning your purchase, reserve your down payment amount separately from your closing costs. For a $350,000 home with 10% down: you need $35,000 + ~$8,750 closing costs = $43,750 minimum cash to close, plus reserves.
How does my interest rate affect how much house I can afford?
Significantly. For the same $2,000/month P&I budget on a 30-year loan: at 4% you can borrow $418,000; at 6% you can borrow $333,000; at 7% you can borrow $302,000; at 8% you can borrow $272,000. A 1% rate increase reduces purchasing power by roughly $30,000-$40,000 on a typical loan. This is why credit score improvement - which lowers your rate - directly increases your affordable home price.