Let’s be honest: mortgage rates over the past few years have made everyone a lot more cautious. When rates hover in the 6% to 7% territory, even a half-percentage-point difference can mean hundreds of dollars a month.
Naturally, whenever buyers start feeling the pinch, lenders and builders start pitching rate buydowns:
“Why don’t we buy the rate down?”
It sounds like an easy win. But rate buydowns aren’t one-size-fits-all, and they come in two completely different flavors: a permanent buydown (paying points upfront to lower the note rate forever) and a temporary buydown (typically a 2-1 buydown that steps up over three years).
If you’re deciding between the two—or trying to figure out how to allocate seller concessions—the right choice comes down to pure math, your time horizon, and your refinancing plans.
Let’s pull back the curtain and look at the real numbers.
The Baseline Scenario
To keep things apples-to-apples, let’s run a practical scenario:
- Home Purchase Price: $625,000
- Down Payment (20%): $125,000
- Loan Amount: $500,000 (30-year fixed)
- Standard Market Rate: 6.75%
- Baseline Principal & Interest (P&I): $3,243 / month
Now, let’s look at what happens when you compare a 2-1 Temporary Buydown against a Permanent Discount Points Buydown.
Strategy A: The 2-1 Temporary Buydown
How It Works
A 2-1 buydown reduces your interest rate by 2% in Year 1 and 1% in Year 2, before returning to the full note rate in Year 3 for the remaining 28 years:
- Year 1: 4.75%
- Year 2: 5.75%
- Years 3–30: 6.75%
The subsidy is held in an escrow account and disbursed each month to make up the difference to the lender. In today’s market, this cost is almost always covered by seller concessions or a builder credit, though a buyer can technically fund it as well.
The Math: Cash Flow Breakdown
- Year 1 (4.75%): Monthly P&I is $2,608
- Monthly Savings: $635/mo ($7,620 total saved in Year 1)
- Year 2 (5.75%): Monthly P&I is $2,918
- Monthly Savings: $325/mo ($3,900 total saved in Year 2)
- Year 3+ (6.75%): Reverts to the baseline $3,243/mo
Total Upfront Cost & Total Savings
The total cost to fund the escrow account is simply the sum of those first 24 months of savings:
$7,620 + $3,900 = $11,520 (roughly 2.30% of the loan amount).
- Cumulative 2-Year Savings: $11,520
- Breakeven Horizon: Instant (Day 1). Because you receive the exact dollar subsidy back in monthly payment reductions over 24 months, there is no breakeven lag. If you refinance at month 14, any unspent escrow funds are credited against your remaining principal balance.
Strategy B: The Permanent Buydown (Discount Points)
How It Works
With a permanent buydown, you pay discount points upfront at closing to knock down the interest rate for the entire 30-year term.
As a general rule of thumb in mortgage lending, 1 point (1% of the loan amount) permanently lowers your rate by approximately 0.25% (market pricing fluctuates, but 0.25% per point is the industry baseline).
To make a fair comparison against the ~$11,520 cost of the 2-1 buydown:
- Points Purchased: ~2.25 points
- Upfront Cost: $11,250 ($500,000 × 2.25%)
- New Permanent Rate: Reduced by ~0.56% (from 6.75% down to ~6.19%)
The Math: Cash Flow Breakdown
- Monthly P&I at 6.19%: $3,059 / month
- Monthly Savings: $184 / month (every single month for up to 30 years)
Calculating the Breakeven Horizon
Because you paid $11,250 upfront to save $184/month, you have to live in the property and keep this exact mortgage long enough to recoup that initial cash outlay:
If you refinance, sell, or pay off the home before Month 62, you lose money on the points. If you keep the loan past Year 5, every subsequent month yields pure profit.
Side-by-Side Comparison: $500,000 Loan
| Metric | Standard Baseline | 2-1 Temporary Buydown | Permanent Buydown (~2.25 pts) |
| Upfront Cost | $0 | ~$11,520 (usually seller-paid) | ~$11,250 |
| Year 1 Payment | $3,243/mo | $2,608/mo (saves $635/mo) | $3,059/mo (saves $184/mo) |
| Year 2 Payment | $3,243/mo | $2,918/mo (saves $325/mo) | $3,059/mo (saves $184/mo) |
| Year 3+ Payment | $3,243/mo | $3,243/mo | $3,059/mo (saves $184/mo) |
| Total 24-Mo. Savings | $0 | $11,520 | $4,416 |
| Breakeven Horizon | N/A | Immediate / Escrow-Protected | ~61 Months (~5.1 Years) |
When Does a 2-1 Buydown Win?
A 2-1 temporary buydown is ideal if:
- You expect rates to drop within 12–24 months: If market conditions soften and you refinance into a lower permanent rate in year 1 or 2, you extracted maximum monthly savings without stranding upfront points.
- You want financial breathing room early on: Moving into a home comes with real-world transition expenses—new furniture, landscaping, window coverings, or minor updates. Saving over $600/month in Year 1 leaves extra liquidity in your checking account when you need it most.
- The seller or builder is covering the credit: Many sellers are reluctant to slash their listing price by $12,000, but they are happy to credit $12,000 toward closing costs. On a $500,000 loan, a $12,000 price cut only saves a buyer about $78/month, whereas a 2-1 buydown saves $635/month in Year 1.
When Does a Permanent Buydown Win?
A permanent buydown takes the crown if:
- This is your long-term “forever” mortgage: If you know you won’t touch this loan for 7, 10, or 15+ years, crossing the 5-year breakeven threshold unlocks cumulative compounding savings. Over 10 years, that $184/month savings adds up to $22,080—yielding a net return of nearly $11,000 over the initial cost.
- You prefer static, predictable budgeting: Some buyers dislike payment step-ups. If knowing your payment will never change brings you peace of mind, locking in a lower permanent rate eliminates rate reset anxiety.
- You don’t want to gamble on a future refinance: Refinancing requires paying a new round of closing costs, re-verifying employment/income, and meeting appraisal guidelines. A permanent buydown locks in your rate without banking on market timing.
The Bottom Line
Before signing off on any buydown incentive, ask yourself two simple questions:
- “Realistically, how many years will I keep this exact loan before moving or refinancing?”
- “Would I rather have aggressive cash flow relief right now, or modest, guaranteed savings over the long haul?”
Run the breakeven math with your lender, look at how the concession is being funded, and let the timeline dictate the strategy. When you are ready to make your move, contact us to assist you.
MEHRAN PARSAI Associate Broker | Compass Helping buyers, sellers, and investors throughout Scottsdale and the Greater Phoenix area since 1995. Schedule a Consultation (480) 980-2244 [email protected] Parsai.com