Buyer's guide
Builder Lender or Your Own? How to Actually Decide
The incentive is tied to their lender. That does not settle it.
By William Zhang, Austin Realtor · Updated
The short answer
Most Austin builders tie their largest incentives to their in-house mortgage and title companies, so using an outside lender usually forfeits the headline incentive. You can use any lender you want. The decision should come from comparing complete loan estimates side by side on all-in cost including fees, not on the advertised rate, because the tied loan often carries a higher fee load that offsets part of the buydown.
Why the incentive is tied
Builders own or partner with a mortgage company and a title company, and the incentive is how they route volume to them. This is disclosed to you in an Affiliated Business Arrangement disclosure, which is a real document you should read rather than initial.
The arrangement is common across the industry. It is also the reason the builder's quoted rate is not comparable to anything you were pre-approved for elsewhere.
How to run the comparison properly
Get a full Loan Estimate from the builder lender and from at least one outside lender on the same day, for the same loan amount, product and lock period. Then compare four things.
- The total cash to close, not the rate.
- The monthly payment including mortgage insurance, taxes and insurance escrows.
- Lender fees, origination, discount points and any processing or underwriting charges, which is where a tied loan commonly recovers part of its buydown.
- The rate itself, and specifically whether the buydown is permanent or a temporary 2-1 that steps up after the first years.
When the builder lender genuinely wins
Often, particularly at the volume builders. A large permanent buydown funded by the builder is real money that an outside lender cannot match, because the outside lender has no incentive budget. On entry-level inventory, the tied loan frequently wins outright.
The point is not that the builder lender is a trap. The point is that you should know by how much it wins, because that number is also your leverage on everything else in the deal.
When to use your own lender anyway
If your situation is unusual, the tied lender may simply not have a product for you. Foreign national borrowers without US credit history, self-employed buyers with complex returns, and buyers using specialised loan programs often find the builder lender cannot do the loan at all.
Find that out early. Discovering it once you are committed means losing the incentive and sometimes the home, because by then the clock on your closing date is already running.
I am a licensed Texas real estate agent, not an attorney. Nothing here is legal advice, and I do not interpret builder contracts, addenda or warranty terms — that is a real estate attorney's job, not mine. What I can do is represent you through the negotiation, the inspection and the walkthrough, and tell you when something belongs in front of a lawyer.
Answered
Can a builder require me to use their lender in Texas? ▾
In practice, builders condition their incentive on using their lender rather than requiring it outright, and that is near-universal across the industry. So for most buyers it is a financial decision: price the tied loan against an outside quote on all-in cost and see how much the incentive is actually worth. If you want to know what the paperwork obligates you to, ask a real estate attorney.
Is a 2-1 buydown the same as a permanent rate buydown? ▾
No, and the difference is large. A 2-1 buydown lowers your rate by two points in year one and one point in year two, then it reverts to the note rate for the remaining term. A permanent buydown lowers the note rate itself for the life of the loan. They are marketed in similar language and are worth very different amounts, so ask which one is on the table and get it in writing.
What if I get a better rate elsewhere after I have committed? ▾
You can generally still switch, but you will likely lose the builder incentive that was tied to their lender, and you need to be certain the new lender can close by your scheduled date. Builders hold that date firmly. Run the numbers on the whole package rather than the rate alone, and if you want to know where switching leaves you on the paperwork, ask a real estate attorney.
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Reviewed and updated September 23, 2026.