How to Estimate What a Buyer Can Afford
You don't need to rely on one percentage. Start with four parts of the buyer's financial picture.
- Verified income: Review the income the buyer reasonably expects to use for the payments.
- Existing debt: Include recurring obligations such as car loans, credit cards, and other monthly debt payments.
- Total housing cost: Look beyond principal and interest to property taxes, insurance, and other required housing expenses.
- Cash upfront: Make sure the buyer can cover the agreed down payment and applicable closing costs without leaving the payment plan unrealistic.
What About the 28% and 36% Rules?
A common screening guideline compares housing costs with about 28% of monthly income and total monthly debt with about 36%.
Those percentages can be a quick reference, but they aren't a universal approval standard. A buyer's full financial picture and the rules that apply to the transaction matter more than one ratio.
Simple Seller Financing Affordability Example
Suppose a buyer earns $4,000 per month and already pays $500 toward other monthly debts.
- Income: $4,000 per month.
- Existing debt: $500 per month.
- Proposed housing cost: Include the mortgage payment, taxes, and insurance.
- Cash available: Confirm the buyer can handle the down payment and closing costs too.
The goal isn't to stretch the payment to the highest possible number. It's to understand whether the buyer can reasonably support the agreement over time.
Verify the Numbers Before Creating the Note
Depending on the transaction, documents used to understand ability to pay may include pay statements, W-2s, tax returns, benefit income, bank statements, or other support for expected income.
Federal rules can also apply to seller-financed residential transactions. CFPB guidance for certain seller financers discusses making a good-faith determination of the buyer's reasonable ability to repay.
See CFPB Regulation Z Section 1026.36 .
A qualified attorney, loan originator, or other professional familiar with seller financing can explain which federal and state requirements apply to a specific transaction.
Why Buyer Affordability Matters to Your Mortgage Note
Once the sale closes, the buyer's promise to pay becomes your mortgage note. The terms you create today can affect how that note performs and how a note buyer evaluates it later.
Factors that can matter include:
- Down payment: More buyer equity can provide additional protection in the transaction.
- Monthly payment: A payment the buyer can maintain may support a cleaner payment history.
- Interest rate: The rate affects both the payment and the future economics of the note.
- Payment history: Consistent records help show how the note has performed after closing.
Learn more about two of these factors in Seller-Financed Notes and Interest Rates and How Payment History Affects Your Mortgage Note's Value .
If you later want cash instead of continuing to collect payments, you may be able to sell the full note or only part of the future payment stream.
Seller Financing Affordability FAQs
How do I know if a buyer can afford seller financing?
Review the buyer's verified income, existing monthly debts, proposed housing costs, and available cash for the down payment and closing. Applicable federal and state requirements should also be considered.
Is the 28%/36% rule required for seller financing?
No. The 28% housing and 36% total-debt figures are commonly used screening guidelines, not universal approval requirements. The buyer's full financial picture and applicable lending rules matter.
Does the buyer's affordability affect mortgage note value?
It can affect how the note performs. Note buyers also consider the payment history, interest rate, remaining balance, term, property, equity, lien position, documentation, and other factors when evaluating a note.
Can I sell a seller-financed note later?
Yes. Depending on the note, you may be able to sell the full remaining payment stream or only part of the future payments for cash.
See Can I Sell Part of My Mortgage Note? for an example.
The information provided in this article is for general educational purposes only and reflects Alpine West Notes' experience purchasing, selling, and investing in real estate notes and seller-financed transactions. It should not be considered legal, tax, financial, or investment advice. Every note, property, and financial situation is unique.
