Do You Have to Use the Builder's Lender? What the Incentive Really Costs

Most builders will tell you that their closing cost credit or rate buydown applies when you finance through their preferred lender. That is a legitimate way for a builder to structure an incentive. It is also a decision worth slowing down on, because a $10,000 credit paired with a loan that costs you more over time is not a $10,000 gift.

Do you have to use them?

Generally, no. A builder cannot force you to use a particular lender, but it can attach its incentive to using one, and that is a business choice you can accept or decline. Read your contract carefully for the exact language, including what happens to the incentive if you finance elsewhere or pay cash.

How to compare the two offers

Ask for a Loan Estimate from the builder's lender and from at least one outside lender on the same day, for the same loan type and the same loan amount. Then compare:

• Interest rate and APR at the same discount point level.
• Origination and lender fees, listed in the first section of the estimate.
• Lock terms: how long the lock lasts, and what it costs to extend if construction slips.
• What the incentive actually covers: closing costs only, points, or a temporary buydown.

Do the whole-cost math

Add up the credit you would receive and subtract any difference in fees and interest cost over the time you expect to keep the loan. If the builder's lender is within a hair of the outside offer and the credit is real money, the incentive often wins. If the outside lender is meaningfully cheaper, you may be better off taking that loan and negotiating a price reduction instead. Both outcomes happen.

Where I see buyers tripped up

The lock is the sleeper issue. A new home may not be done on the day you expected, and an expiring lock can cost real money. Ask who pays for an extension if the delay is the builder's. Also ask how the credit appears on your closing disclosure so you can see it, not just hear about it.

I represent the buyer, not the builder, so I will happily walk through the two estimates with you. It takes an afternoon, and it can change the answer.