Find Out How Much Home You Can Actually Afford
Estimate how much home you can afford. Enter your income, debts, and down payment to calculate your maximum pre-approval amount based on standard lender DTI guidelines.
| Click "Calculate buying power" to see results |
How to Use the Buying Power Calculator
Four inputs are all you need to get a lender-grade affordability estimate. The whole process takes under two minutes and gives you a number you can actually bring to a pre-approval conversation.
Enter Income & Monthly Debts
Input your annual gross income before taxes — include all sources including a co-borrower if applicable. Then enter the total of your minimum monthly debt payments: credit cards, car loans, student loans. Do not include rent, utilities, or groceries — lenders don’t count those.
Choose Your DTI Limit Profile
Select the debt-to-income profile that matches your loan type. Conservative (28/36) for lower-risk scenarios, FHA Standard (31/43) for FHA loans, Conventional (36/45) for most conforming loans, or High Balance (45/50) for strong-credit jumbo applications. If unsure, start with Conventional and compare.
Set Loan Terms & Property Costs
Enter your available down payment, target interest rate, and loan term. Then add estimated annual property tax, homeowners insurance, and monthly HOA dues if applicable. These amounts are subtracted from your DTI capacity to find the true principal and interest budget — and they make a significant difference in the result.
Review Results & Download PDF
Your maximum home price, loan amount, and full monthly payment breakdown appear instantly. The DTI status cards show exactly which ratio is constraining your buying power and how much headroom you have. Download the 1-page PDF pre-qualification estimate to share with your realtor or bring to a lender meeting.
Front-End vs. Back-End DTI — What They Mean
Lenders apply two DTI limits simultaneously. Your buying power is determined by whichever one you hit first — and understanding which one binds you tells you exactly how to improve your position.
Housing costs only
The front-end ratio (also called the housing ratio) measures just your proposed monthly housing payment as a share of gross income. It includes principal, interest, property tax, homeowners insurance, and HOA dues — nothing else.
- Conservative lenders: up to 28%
- FHA standard: up to 31%
- Conventional: up to 36%
- High-balance / jumbo: up to 45%
All debts combined
The back-end ratio measures all of your monthly debt obligations — housing plus car payments, credit card minimums, student loans, and any other recurring debt — as a share of gross income. This is the ratio most likely to constrain buyers with existing debt.
- Conservative lenders: up to 36%
- FHA standard: up to 43%
- Conventional: up to 45%
- High-balance / jumbo: up to 50%
What the Calculator Shows You
This isn’t a simple income multiplier. Every output is calculated using real lender methodology — DTI limits, reverse mortgage math, and a full monthly cost breakdown — so the number you see is the number a lender would actually work from.
Maximum Home Price
The top-line figure: the highest purchase price you can qualify for based on your inputs and the selected DTI limits. Calculated as the maximum loan amount plus your down payment — this is the number to give your realtor as your search ceiling.
Max Monthly Housing Payment
The maximum total monthly housing cost you qualify for — principal, interest, property tax, insurance, and HOA — based on the binding DTI limit. This is the number lenders actually underwrite against, not just the P&I payment.
DTI Status with Headroom
Colour-coded pass/warning cards for both front-end and back-end ratios, showing your actual percentage, the limit, and exactly how much headroom remains. The calculator also identifies which ratio is the binding constraint — critical for knowing where to focus improvement efforts.
Monthly Payment Breakdown Table
A line-by-line breakdown of the maximum monthly housing payment: principal & interest, property tax, homeowners insurance, and HOA dues shown separately. You can instantly see how much of your DTI capacity is consumed by escrow versus actual loan repayment.
Income Usage & Funding Charts
A donut chart showing how your gross monthly income is allocated across P&I, tax and insurance, existing debts, and remaining income. A stacked bar chart breaks the home price into loan amount versus down payment — instantly showing your leverage position.
1-Page PDF Pre-Qualification Report
A professionally formatted report covering your maximum home price, financial profile, monthly payment breakdown, DTI analysis table, and 6 summary cards. Designed to be shared with a realtor or brought to a lender conversation as a structured starting point.
Home Affordability in the US — Key Figures
Three Buyers — Three Different Affordability Situations
Buying power looks very different depending on your debt load, down payment size, and income structure. These three profiles show how the same income can produce very different results — and what levers actually move the number.
You earn $80,000 a year but carry $600/month in student loan and car payments. Even with solid income, your back-end DTI fills up fast — leaving far less room for a housing payment than your income alone would suggest. The calculator’s DTI status cards will show the back-end limit binding well before the front-end does, and the “headroom” figure tells you exactly how much of your debt you’d need to eliminate to unlock more buying power.
- Run the calculator with your current debt load, then again with debts paid off to see the buying power difference
- Paying off a $350/month car loan could increase your max home price by $50,000–$60,000
- Consider a longer repayment plan on student loans to lower the minimum payment before applying
You earn $150,000 and have minimal debt — so your DTI allows a large loan. But you only have $40,000 saved for a down payment. Your loan-to-value will be high, PMI will apply, and the gap between your maximum loan and a comfortable loan is wide. Use this calculator to model what the maximum monthly payment actually looks like — then decide if that payment leaves enough room for the lifestyle and savings you want.
- The calculator shows the DTI ceiling — your comfortable target is likely 10–15% lower
- Add estimated PMI (0.5–1% of loan/year) to the monthly payment when evaluating comfort
- Run the calculator at both 36% and 28% front-end DTI to see the difference between the max and the comfortable range
You’re selling a home and expect $200,000+ in equity to apply toward the next purchase. A large down payment dramatically increases your buying power — but your income and debt picture may look different now than when you bought your first home. Run the calculator with your new income, current debts, and the actual equity you expect to receive after closing costs to get an accurate ceiling for your next search.
- Use the net equity (sale price minus mortgage payoff and closing costs) as your down payment figure
- Model the scenario where your current home sells for 5–10% below asking to stress-test the down payment
- Account for bridge loan payments if you’ll carry both mortgages briefly — include those in monthly debts
7 Things to Know Before You Start a Home Search
Your maximum buying power and your ideal buying power are two different numbers. These seven principles will help you use this calculator to find the right target — not just the highest possible ceiling.
The DTI Ceiling Is Not Your Target — Aim 10–15% Below It
Lender DTI limits define the maximum you can borrow, not the amount that leaves you financially comfortable. At the maximum back-end DTI of 45%, most of your discretionary income is consumed by housing and debt. Financial advisors consistently recommend keeping housing below 25–28% of gross income — meaningfully lower than what most lenders will approve. Use the calculator to find your ceiling, then set your search target well below it.
Every $100/Month in Debt Costs You ~$15,000 in Buying Power
Under conventional DTI limits at a 6.75% rate, each $100/month of existing debt reduces your maximum loan amount by roughly $15,000–$18,000. A $400/month car payment is costing you $60,000–$72,000 in buying power. Run the calculator with your current debt load and then with debts eliminated — the buying power difference often justifies paying down debt before applying for a mortgage.
Property Tax and Insurance Consume More DTI Than Most Buyers Realise
On a $500,000 home in a high-tax state, property tax alone can add $500–$800/month to your housing cost — consuming a significant portion of your DTI capacity before the mortgage is even counted. Always enter realistic estimates for your target area, not national averages. Your lender will pull actual tax records at underwriting, so an underestimate in the calculator leads to an overestimate of buying power.
Check Both DTI Profiles: Conservative and Conventional
Run the calculator twice — once at Conservative (28/36) and once at Conventional (36/45). The difference between the two results is your DTI risk zone: the range of purchase prices where you qualify on paper but carry elevated financial pressure. Staying within the Conservative range gives you a meaningful buffer for income disruption, maintenance costs, and unexpected expenses.
Budget 1–2% of Home Value Annually for Maintenance — Outside Your DTI
Lender DTI calculations do not include home maintenance, repairs, or capital expenses. A $450,000 home realistically requires $4,500–$9,000/year in maintenance — $375–$750/month that must come out of your remaining income after housing and debts. Factor this into your real-world budget before committing to a home at the top of your buying power range.
Know Which DTI Ratio Is Binding — It Changes Your Strategy
The calculator identifies whether the front-end or back-end ratio is constraining your buying power. If the front-end is binding, a higher down payment (reducing the loan amount and thus the housing payment) is your most direct lever. If the back-end is binding, paying down debt is more effective. Misidentifying the constraint leads to the wrong corrective action — the DTI status cards show you exactly where the ceiling is.
Download the PDF and Bring It to Your First Lender Meeting
The PDF pre-qualification report gives you a structured, numbers-first starting point for a lender conversation. Rather than entering the meeting without context, you can present your estimated maximum price, monthly payment target, and DTI position — and ask specific questions about overlays, credit adjustments, and loan product options. Lenders respond better to prepared buyers, and the PDF signals that you understand the process.
Frequently Asked Questions
Everything you need to know about how this calculator works, what DTI ratios mean, and how to interpret your maximum buying power result.
Disclaimer: All results produced by the Buying Power Calculator are estimates for educational and planning purposes only. This calculator applies front-end and back-end DTI ratios to gross income to determine a maximum qualifying payment and reverse-calculates a loan amount using a standard amortisation formula. Results do not account for Private Mortgage Insurance (PMI), credit score adjustments, lender overlays, loan origination fees, closing costs, reserve requirements, or other underwriting factors that may affect actual pre-approval amounts. Property tax and insurance estimates are user-provided and may differ from actual amounts. This calculator is not a pre-approval, a pre-qualification letter, or a commitment to lend. Always consult a licensed mortgage professional and review your official Loan Estimate before making any financial or real estate decision.