A dollar spent buying down your interest rate saves more per month than a dollar added to your down payment — and the gap compounds over 30 years. Here's the math, the strategy, and how to execute it.
Check Your Numbers Free →When you're trying to shrink your monthly mortgage payment, there are two levers: put more money down (reducing your loan balance) or buy down your interest rate (reducing what you're charged per dollar borrowed). Most buyers default to the first lever. Most buyers are wrong.
Here's why: interest charges compound over 30 years. Every dollar of rate reduction saves you money not just this month — it saves you money on every payment for the life of the loan. Extra down payment only removes interest from the marginal dollars you didn't borrow. Rate buydown removes interest from every dollar you did borrow.
The headline: On a $300,000 loan at 7%, an extra $10,000 toward down payment saves you roughly $67/month. The same $10,000 used to buy down your rate by 0.5% (7% → 6.5%) saves roughly $100/month — a 49% larger savings, every month, for 30 years.
That $33/month difference doesn't sound dramatic. Run it out: over 30 years at the same rate, the buydown strategy returns roughly $11,880 more in cumulative savings than the extra down payment. Same $10,000. Smarter placement.
There's a second factor: liquidity. Cash put into a down payment is trapped in your home's equity — illiquid, inaccessible without refinancing or selling. Cash held in reserves earns interest, funds emergencies, and keeps you financially flexible. Rate buydowns let you minimize your payment while keeping cash available. That flexibility has real option value.
Baseline: $300,000 loan at 7.00%, 30-year fixed. Monthly payment (P&I): $1,996/month.
Same $10,000 — different placement, different outcome
| Metric | Extra $10K Down ($300K → $290K loan) |
$10K in Seller Credits (7.00% → 6.50% rate) |
|---|---|---|
| Loan Amount | $290,000 | $300,000 |
| Interest Rate | 7.00% | 6.50% |
| Monthly Payment (P&I) | ~$1,929/mo | ~$1,896/mo |
| Monthly Savings vs. Baseline | $67/mo | $100/mo Winner |
| 10-Year Cumulative Savings | $8,040 | $12,000 |
| 30-Year Total Savings | $24,120 | $36,000 |
| Cash Remaining (Liquid) | $0 | $10,000 |
| Best For | Near PMI threshold, short hold period | Long hold, high rate environment, seller concessions available |
The rate buydown delivers 49% more monthly savings and $11,880 more in total 30-year savings — while leaving $10,000 liquid in your account instead of buried in home equity.
See how your specific deal stacks up — purchase price, rate, down payment, seller credits. Get an objective read before you sign anything.
Check Your Numbers Free →The mechanics are straightforward. The execution happens in three stages: contract negotiation, credit direction, and cash management. Miss any one of these and you leave money on the table.
Seller concessions are credits the seller pays toward your closing costs. They're negotiated as a dollar amount or percentage of the purchase price and written directly into the purchase agreement. In a soft market, sellers routinely contribute 2–3% without meaningful resistance. On a $400,000 home, 3% = $12,000 in usable credits. Ask for them in your initial offer or as a counteroffer concession. Phrase it as: "We'll offer $400,000 with $12,000 in seller concessions toward buyer closing costs."
Once concessions are agreed, tell your lender to apply them toward discount points — prepaid interest that permanently reduces your rate. One point = 1% of your loan amount and typically buys 0.25% in rate reduction. So on a $300,000 loan, $3,000 = 1 point = rate drops from 7.00% to 6.75%. Four points ($12,000) could take you from 7.00% to 6.00%. Your lender will provide a loan estimate showing exactly how many points buy how much rate reduction — get this in writing before proceeding.
Unless you need to cross a PMI threshold (typically 20% down on conventional), put down the minimum your loan type requires. Conventional: as low as 3–5%. FHA: 3.5%. VA and USDA: 0%. Your remaining cash earns interest in a HYSA and stays accessible for repairs, emergencies, or investment. Trapped equity earns you nothing. A lower rate earns you $100/month, every month. If you're in a PMI zone, calculate whether the PMI cost outweighs the rate buydown benefit — sometimes it does, sometimes it doesn't. Run the math both ways.
A permanent rate buydown is the long-game play. The 2-1 buydown is the short-game play — and in a high-rate environment with expected rate cuts, it's often the smartest move on the board.
Here's how it works: the seller funds a lump-sum escrow contribution that subsidizes your rate for the first two years:
$400,000 loan at 7.00% (note rate). 2-1 buydown: year 1 = 5.00%, year 2 = 6.00%, year 3+ = 7.00%. P&I only.
The seller funds roughly $9,300 in escrow. You get $514/month in breathing room in year 1. The strategic play: if rates drop and you refinance before year 3, any unused escrow balance is refunded to you. You captured the savings, kept the flexibility, and potentially exited before the note rate ever kicked in.
Important: The 2-1 buydown requires you to qualify at the note rate (7% in this example), not the year-1 rate. Lenders underwrite to the full rate to ensure you can handle payments once the subsidy expires. Plan your budget accordingly.
Not all concessions are created equal. How much the seller can contribute depends on your loan type and — for conventional loans — your down payment size. Exceed the cap and the lender will reduce the credit at closing, leaving money on the table.
| Loan Type | Down Payment | Max Seller Concessions | Notes |
|---|---|---|---|
| Conventional | Less than 10% | 3% of purchase price | Fannie Mae/Freddie Mac guidelines |
| Conventional | 10–24.99% | 6% of purchase price | More flexibility with larger down |
| Conventional | 25% or more | 9% of purchase price | Maximum allowable concession |
| FHA | 3.5% minimum | 6% of purchase price | Includes discount points, closing costs |
| VA | 0% required | 4% in concessions | Seller can also pay all allowable closing costs separately |
| USDA | 0% required | 6% of purchase price | Rural/suburban loan program |
Discount points aren't infinitely scalable. Most lenders cap the rate reduction at 2–3 points (0.5–0.75% reduction) before the math stops working in your favor. Beyond that threshold:
Rule of thumb: Get a loan estimate showing break-even on each point purchase. If break-even is under 36 months and you plan to stay that long, buy the points. If break-even is 5+ years, the permanent rate buydown pencils less well — a 2-1 buydown may serve you better.
Plug in your purchase price, rate, and seller credits. See exactly where you stand and whether the numbers make sense.
Analyze My Numbers →There's no universal answer. The right move depends on your rate environment, hold period, PMI situation, and cash reserves. Here's the honest breakdown:
The one scenario where extra down payment clearly wins: when you're just below the 20% threshold and PMI is costing you $150–$200/month. Eliminating PMI is a guaranteed, immediate return. No break-even math required. In this case, use enough down payment to cross the 20% line, then evaluate whether remaining cash is better used for rate buydown or liquid reserves.
Seller concessions don't require a distressed seller or a buyer's market. They require framing the request correctly. The key: concessions feel less threatening to sellers when bundled with a clean offer at or near asking price.
"We're offering $420,000 with $10,000 in seller concessions toward buyer's closing costs. We're well-qualified, pre-approved, and prepared to close on your timeline. The concessions allow us to lock a rate that keeps the deal financially solid for both parties — we're not asking you to reduce your net proceeds, just to structure the transaction this way."
Sellers often perceive a price reduction as more painful than concessions — even when the net financial outcome is identical. Why? A price reduction shows up publicly in comps. Concessions don't. Use this to your advantage. If a seller won't budge on price, ask for concessions instead. Same dollars, different psychology.
Builder concessions tip: When buying new construction, always ask the builder to direct concessions toward mortgage rate buydown rather than upgrades. A $15,000 kitchen package adds maybe $10,000 to resale value. A $15,000 rate buydown saves you $150/month for life and adds to every future refinance calculation. The kitchen depreciates; the rate reduction compounds.
Run the math on your specific deal — purchase price, rate, down payment, and seller credits. Get clarity before you're at the negotiating table.
Get Your Numbers Analyzed →