Determine How Much Home You Can Afford
How much home you can afford depends on your income, your monthly debts, your cash and the full cost of owning, not just the loan payment. Lenders measure this with debt-to-income ratios, or DTI. Knowing your own number before you shop keeps you from falling for a home that fits the lender’s formula but strains your budget.
Key Takeaways
- Front-end DTI is your housing payment divided by gross monthly income; back-end DTI adds your other monthly debts.
- Old rules of thumb are 28% front and 36% back. Many approvals go higher: conventional commonly up to 45%, FHA guideline 31% and 43%, with more possible on strong files.
- Your housing payment includes principal, interest, property taxes, homeowners insurance, mortgage insurance and HOA dues.
- What a lender will approve and what feels comfortable are two different numbers. Decide on your own comfort level first.
What is debt-to-income ratio?
DTI compares what you owe each month to what you earn before taxes. Lenders use two versions.
- Front-end ratio (housing ratio): your total monthly housing payment divided by gross monthly income.
- Back-end ratio (total DTI): your housing payment plus all other monthly debt payments, such as car loans, student loans and credit card minimums, divided by gross monthly income.
Traditional guidance is the 28/36 rule: no more than 28% of gross income on housing and 36% on total debt. That is a conservative starting point. Actual limits depend on the loan program, your credit, your down payment and whether you receive an automated approval.
| Loan type | Typical DTI guideline | Learn more |
|---|---|---|
| Conventional | Commonly up to 45%; up to about 50% with a strong automated approval and compensating factors | Conventional DTI |
| FHA | 31% housing and 43% total as a guideline; higher possible with compensating factors | FHA DTI |
| VA | 41% guideline, with residual income as an additional test | VA residual income |
| Jumbo | Varies; usually stricter | Jumbo DTI |
What goes into the monthly payment?
Most buyers focus on principal and interest, but lenders count the whole housing payment, often called PITI plus extras.
- Principal and interest on the loan.
- Property taxes. Under Prop 13, the base tax is 1% of assessed value plus local voter-approved charges, commonly about 1.1% to 1.25% in total. Some areas add Mello-Roos or special assessments, which can be significant.
- Homeowners insurance. Costs vary widely by location and property, and wildfire exposure can change availability and price. Get a quote early.
- Mortgage insurance if you put down less than 20% on a conventional loan, or FHA mortgage insurance.
- HOA dues, common with condos and many planned communities.
How do I calculate what I can afford?
- Find gross monthly income. Divide annual pre-tax income by 12. Include all income a lender can count and document.
- Add up monthly debts. Use the minimum payments on your credit report: auto, student, cards, personal loans and support obligations.
- Apply a DTI limit. Multiply gross monthly income by the DTI percentage, then subtract your other debts. What is left is the most a lender may allow for housing.
- Convert the payment to a price. Subtract taxes, insurance and dues, and the remainder is what can go to principal and interest. A loan officer can translate that into a loan amount at current rates.
- Cross-check with your real life. Compare the payment with your current rent, savings goals, childcare, commuting and retirement contributions.
How much income do I need for a California price?
California prices make income a real constraint. Suppose a purchase of $850,000 produces a total housing payment of about $5,200 (taxes, insurance and any HOA included). That figure is an assumption for this example, not a quote. Reverse the math:
- At a 28% front-end ratio: $5,200 / 0.28 = $18,571 per month, or about $222,857 per year.
- At a 45% back-end ratio with no other debts: $5,200 / 0.45 = $11,556 per month, or about $138,667 per year.
The gap between those two incomes shows why programs, down payment size and credit matter. It also shows why reviewing your options with a professional can change the answer. Our guide to first-time home buyer help in California outlines tools that may help, and the loan limit lookup shows what financing is available in your county.
What else affects affordability?
- Down payment size. More down means a smaller loan and less or no mortgage insurance. See saving for your down payment and closing costs.
- Interest rate and loan term. Small rate changes move the payment. Rates change daily, so ask for a current quote.
- Self-employment income. Lenders typically average net income over two years. Some borrowers use bank statement loans instead.
- Other costs. Maintenance, utilities and furnishing do not appear in DTI but belong in your budget.
At Lendia, we help you find your comfortable number
At Lendia, we compare options from multiple lenders and look at both the approval limit and your everyday budget. A Licensed Lendia California Loan Officer can run scenarios with different down payments and loan types. Once you have a target, choose a lender and get preapproved. Contact us or get a rate quote now.
Frequently Asked Questions
What is a good DTI for a mortgage?
Lower is safer. Many borrowers qualify with total DTI up to 45%, but a ratio well under that leaves more room in your budget and often more options.
Do lenders use gross or net income?
Gross, meaning before taxes. That is why your own budget check on take-home pay matters.
Does rent count in DTI?
Rent is not counted as a debt on your credit report, but your new housing payment replaces it in the calculation.
How can I lower my DTI?
Pay off or pay down installment and revolving debts, add qualifying income, or choose a lower-priced home. Do not open new debts before closing.
Will the bank approve me for more than I should spend?
It can. Approval means you meet guidelines, not that the payment suits your goals. Set your own limit before you shop.
Rates and terms depend on your situation; approval requires qualification.
Talk to a Licensed Lendia California Loan Officer
At Lendia, we review your situation and show you the programs you qualify for.