Who Actually Pays for a Mortgage Buydown?

A mortgage buydown has to be paid for by someone. The interesting part is that it is usually not you — the borrower. In 2026 most buydowns are funded by the seller, the builder, or the lender as a concession. Understanding who pays, and how the caps work, is the key to negotiating a better deal.

The four parties who can fund a buydown

There are exactly four parties who can pay the upfront cost of a temporary buydown:

1. The seller — as a concession in a purchase offer
2. The home builder — as an incentive on new construction
3. The lender — as a rate promotion or credit
4. The borrower — out of pocket, at closing

In practice, borrower-funded buydowns are rare. If you are going to pay upfront to lower your rate, you would usually buy discount points for a permanent rate reduction instead of a temporary buydown. So the real question is: seller, builder, or lender?

Seller-funded buydowns (the most common)

In a slow market — or when a listing has been sitting — sellers use buydowns to make their home affordable without cutting the list price. A $15,000 buydown concession lowers the buyer's payment by hundreds of dollars per month for 2-3 years, which often helps a buyer qualify or feel comfortable making the purchase. The seller keeps their headline price; the buyer gets monthly relief.

Here is why sellers prefer a buydown over a price cut. On a $500,000 home, dropping the price by $15,000 saves the buyer about $95/month (permanently). Funding a 2-1 buydown with that same $15,000 saves the buyer $400-600/month in year 1. The buydown creates a much bigger psychological impact per dollar of seller concession — which is why sellers reach for it.

The seller funds the buydown by crediting the buyer at closing. The credit goes into an escrow-like buydown account the lender holds, and the lender draws from it each month to cover the difference between the buydown payment and the note-rate payment.

Builder-funded buydowns

New-home builders use buydowns aggressively as a sales incentive, especially through their in-house lenders. You will often see ads like "3-2-1 buydown included!" on new construction. The builder covers the cost, sometimes by 2-3 points of price equivalent, to move inventory.

The catch: builder-funded buydowns are usually tied to using the builder's preferred lender. That is not inherently bad, but it means you cannot shop your rate independently. Get a quote from an outside lender too, and compare the total cost (rate, fees, and the buydown) to see whether the builder deal is actually better.

Lender-funded buydowns

Sometimes the lender itself funds the buydown, usually by giving you a credit equal to the buydown cost in exchange for you accepting a slightly higher note rate. This is effectively a no-cost buydown — the lender is paying for it by charging you more over the life of the loan.

These deals can make sense if you plan to refinance within the buydown period (you capture the savings and then refi out of the higher note rate). They are usually a bad idea if you plan to stay long-term, because the higher note rate costs you more than the buydown saves.

Borrower-funded buydowns

You can pay for a buydown yourself at closing, but it is rarely the best use of your cash. For the same upfront money, you could buy discount points that permanently lower your rate. The only time a borrower-funded temporary buydown makes sense is when you absolutely need the year-1-2 payment relief and cannot qualify at the note rate any other way — and even then, most lenders will not let you qualify at the buydown payment on a conventional loan.

Concession caps by loan type

Whatever the source, seller concessions — including buydowns — are capped by loan type. The cap is a percentage of the purchase price, and it applies to all seller concessions combined (closing cost credits, prepaid items, and buydown funding). If you are also asking the seller to cover $8,000 in closing costs, that eats into the room available for the buydown.

These caps are set by Fannie Mae, Freddie Mac, FHA, VA, and USDA respectively, and lenders enforce them at underwriting. If a 3-2-1 buydown plus your closing costs would exceed the cap, you have to either reduce the buydown, take a price reduction instead, or switch to a loan type with a higher cap.

Negotiation tactics for buyers

• Ask for the buydown in your offer.Sellers in a buyer's market will often accept a 2-1 buydown faster than a price cut of equivalent cost, because it preserves their headline number.
• Know your cap before you negotiate. If you are 5% down on a conventional loan, your cap is 6%. A 3-2-1 buydown plus closing costs may not fit. Use our seller concessions calculator to check.
• Compare to a price reduction. A buydown gives you more monthly relief now; a price reduction gives you less relief but forever. If you plan to stay 7+ years, the price reduction usually wins. If you plan to refi or move in 2-3 years, the buydown wins.
• Do not pay for it yourself. If the seller will not fund the buydown, walk away and consider discount points instead — you get a permanent rate reduction for the same cash.

Tax treatment of seller concessions

Seller-paid closing costs (including buydowns) reduce your basis in the home — they are not taxable income to you. For a purchase, you generally cannot deduct the buydown cost itself, but you can deduct the mortgage interest you actually pay each year (at the reduced buydown rate during the buydown period, then the note rate thereafter), subject to the usual IRS limits. Always confirm with a tax professional; the rules differ for refinances.