Not all mortgage quotes are created equal. When shopping for a loan, small differences in assumptions can lead to very different numbers – making it hard to know if you're truly comparing apples to apples. Use this guide to make sure every quote you receive is based on the same foundation.
Step 1 – Set the same baseline across all lenders
Before requesting quotes, confirm that every lender is working with the exact same loan parameters. Even small differences can significantly change the rate you're offered.
Step 2 – Know what else changes the price
Beyond the basics, these loan-specific factors can have a significant impact on your rate. Be sure to give every lender the same details – and ask the right questions.
- Property Type – Single-family homes, condos, townhouses/PUDs, and multi-unit properties can come with different price adjusters affecting your rate. Condos often carry additional rate adjustments. Confirm that all lenders know the exact property type.
- Number of Units – A single family home typically allows for a lower rate than a 2-unit property. If you're purchasing a duplex or multi-unit home, make sure all lenders are quoting based on the correct unit count.
- Purchase vs. Refinance – Purchase loans often offer better rates than refinances. Make sure all lenders know which transaction type you're quoting – don't mix the two.
- Debt-to-Income (DTI) Ratio – A higher DTI can push your rate higher. Ensure all lenders are working with the same income and debt figures when building your quote.
- Jumbo vs. Conforming Loan – Loans above conforming loan limits price separately and come with stricter requirements (reserves, credit score minimums). Confirm which category your loan falls into before comparing quotes.
- Escrow – Taxes & Insurance – Ask each lender whether your quoted monthly payment includes property taxes and homeowner's insurance (PITI) or just principal and interest (P&I). This makes a big difference when comparing your monthly payment.
- PMI (Private Mortgage Insurance) – If your down payment is less than 20%, your loan may require PMI. PMI costs can vary and add meaningfully to your monthly payment. Be sure to ask your lender about this expense and if it applies to your loan.
- Loan-to-Value Ratio – If the appraisal comes in lower than expected, your LTV can increase which can also influence your rate or available loan programs. Understand how each lender handles this scenario before committing as they each handle LTV‑driven pricing changes differently.
Step 3 – Read the fine print on advertised rates
A note on APR: APR can be a useful quick-comparison tool, but it does not include all closing costs and is still based on lender assumptions – such as credit score, LTV, lock period, etc... When reviewing an advertised rate (on a lender's website or elsewhere), look for the assumptions section in the fine print. Note the credit score, loan amount, down payment, points, lock period, and loan program. If those details don't match your situation, the rate may not apply to you.
When reviewing a Loan Estimate, also check:
- Total Closing Costs – Review the full closing cost section, not just the interest rate. A lower rate with high fees may cost more overall than a slightly higher rate with minimal fees.
- APR vs. Interest Rate – The APR reflects the cost of the loan over time and includes certain fees – but not all. It's a starting point for comparison, not a final answer.
- Lock Expiration – Confirm how long the rate lock is valid. A lock that expires before closing can expose you to rate changes or extension costs.
The Golden rule: Get all quotes on the same day
Why timing matters: Mortgage rates can move multiple times throughout a single trading day in response to economic news and market conditions. A quote from Monday morning and one from Tuesday afternoon are not a valid comparison – you may be looking at two completely different market environments. To get a true apples-to-apples comparison, contact all lenders on the same day, at the same time, with the same loan parameters.
