Understanding the 28/36 Rule
When planning to buy a home, lenders use guidelines to gauge how much of your income can go toward housing and other debts. A widely used benchmark is the 28/36 rule.
The front-end ratio (housing expenses only) and back-end ratio (total debt) help lenders assess your ability to manage monthly payments while covering other living costs. This rule is not a hard requirement, but it provides a solid starting point for estimating an affordable price range.
Sources: Consumer Financial Protection Bureau
Calculating Your Budget
To determine what you can afford, start with your gross monthly income—the amount you earn before taxes and deductions. Your projected housing payment should include not just the mortgage principal and interest, but also property taxes, homeowners insurance, and any HOA fees, collectively known as PITI.
Next, consider your total debt obligations. Add up all monthly debt payments—such as credit cards, auto loans, and student loans—and combine them with your projected housing payment. If your existing debts push you above that threshold, you may need to lower your home price target or reduce other debts first.
Sources: Consumer Financial Protection Bureau
Down Payment Impact
Your down payment directly affects how much you need to borrow and your monthly payment. However, if you put down less than 20%, you may be required to pay private mortgage insurance (PMI), which adds to your monthly costs.
When calculating your budget, factor in how much you can comfortably put down. A lower down payment might increase your upfront costs through PMI, so it’s wise to run the numbers with different down payment amounts to see the impact on your monthly payment.
Sources: Consumer Financial Protection Bureau
Total Debt and DTI
Your debt-to-income (DTI) ratio is a key metric lenders use to evaluate your mortgage application. It is calculated by dividing your total monthly debt payments by your gross monthly income, expressed as a percentage.
- Front-end DTI: only housing expenses.
- Back-end DTI: all monthly debt obligations.
Sources: Consumer Financial Protection Bureau
Affordability Scenarios for Lennar Homes
To see how these principles apply, consider a few illustrative scenarios. Actual rates, taxes, and insurance will vary by location and lender.
You would need to reduce debt or lower your home price.
You might consider a smaller down payment program or a lower-priced home to align with the 28/36 rule.
- These scenarios are illustrative only. Your actual monthly payment depends on current interest rates, property taxes, insurance premiums, and the specific Lennar community and home model you choose.
- Use the 28/36 rule as a guideline to set a comfortable price range.
- Factor in property taxes, insurance, and PMI if applicable.
- Consider how a different down payment changes your monthly payment.
Sources: Consumer Financial Protection Bureau
Frequently asked questions
What is the 28/36 rule for mortgage affordability?
It helps you determine a conservative budget for a home purchase.
Sources: Consumer Financial Protection BureauCan I afford a house with a down payment less than 20%?
However, if you put down less than 20%, you may be required to pay private mortgage insurance (PMI), which adds to your monthly housing cost and should be included in your affordability calculations.
Sources: Consumer Financial Protection BureauWhat counts as housing expenses when calculating affordability?
Housing expenses include the mortgage payment (principal and interest), property taxes, homeowners insurance, and any HOA fees. These are the components that go into your front-end DTI ratio.
Sources: Consumer Financial Protection BureauWhat is debt-to-income ratio and why does it matter?
Debt-to-income (DTI) ratio is the percentage of your gross monthly income that goes toward paying debts. Lenders use it to assess your ability to manage monthly payments. It is calculated by dividing your total monthly debt payments by your gross income. A lower DTI generally makes you a more attractive borrower.
Sources: Consumer Financial Protection BureauSources
- Figure out how much you want to spend — Consumer Financial Protection Bureau
- Data Spotlight: The Impact of Changing Mortgage Interest Rates — Consumer Financial Protection Bureau