Buy Now or Wait for Rates to Drop? Here Is How to Run the Numbers

The Question Is Not About Rates. It Is About Total Cost.

Rates are one variable. They are not the only variable.

When buyers ask "should I wait for rates to drop," they are really asking a different question: will my total cost of homeownership be lower if I delay? That requires a four-part calculation, not a headline rate comparison.

The four variables are:

1. Current purchase price vs. projected purchase price at time of purchase
2. Current rate vs. projected rate at time of purchase
3. Monthly payment difference, compounded across the holding period
4. Opportunity cost of your down payment capital during the wait

Miss any one of these and the analysis is wrong. Most buyers miss all four.

How Price Appreciation Erases Rate Savings

This is the number that surprises most buyers. Rate improvements feel large because they show up immediately in the monthly payment. Price increases feel abstract because they affect the loan principal, not the payment line.

But principal drives interest for the life of the loan.

Worked Example 1: The 18-Month Wait

Assume a buyer is considering a $600,000 home today at a 7.25% 30-year fixed rate.

Scenario A: Buy now.

• Loan amount (20% down): $480,000
• Rate: 7.25%
• Monthly principal and interest: $3,274
• Total interest paid over 60 months: $171,800 (approximate, front-loaded schedule)
• Total payments, months 1-60: $196,440

Scenario B: Wait 18 months for rates to fall to 6.25%.

Assume the local market appreciates at 4.1% annually, which is the 20-year average for U.S. residential real estate per the Federal Housing Finance Agency's House Price Index.

• Home price after 18 months: $600,000 x 1.062 = $637,200
• New down payment required to maintain 20% LTV: $127,440 (vs. $120,000 today, an additional $7,440 in cash)
• New loan amount: $509,760
• Rate: 6.25%
• Monthly principal and interest: $3,139
• Total interest paid over months 1-60 from purchase: $156,900 (approximate)
• Total payments, months 1-60: $188,340

At first glance, Scenario B wins. The monthly payment is $135 lower and total payments over 60 months are $8,100 less.

But the analysis is incomplete.

During those 18 months of waiting, the buyer in Scenario A is paying rent. Assume $2,400 per month, which is realistic for a market where a $600,000 home is available. That is $43,200 in rent payments that build zero equity.

The buyer in Scenario A, meanwhile, accumulates 18 months of principal paydown and equity from any appreciation on the asset they already own.

Net position after 60 months of total ownership (buying now vs. buying in 18 months):

• Rent paid during wait: $43,200
• Extra down payment required: $7,440
• Total additional cash outlay to wait: $50,640
• Payment savings over 60 post-purchase months: $8,100

Waiting costs $42,540 more in this scenario, even after capturing the rate improvement.

That is the number most buyers never calculate.

When Waiting Actually Wins

The math does favor waiting under specific conditions. Three scenarios make the case.

Condition 1: The market is flat or declining.

If price appreciation is 0% or negative, the principal advantage of waiting disappears. The rate savings then flow directly to the bottom line. In a flat market with a 1% rate improvement, the buyer who waits saves approximately $29,700 over a 60-month period on a $480,000 loan, net of rent costs only if rent is below roughly $825 per month. That is rarely the case in markets where $600,000 homes exist.

Condition 2: The rate drop is larger than the market expects.

A drop from 7.25% to 5.75% (150 basis points rather than 100) changes the monthly payment by $548 on a $480,000 loan. Over 60 months, that is $32,880. In a flat-price market with moderate rent, this scenario can tip the calculation toward waiting. The problem is that nobody can reliably forecast a 150-basis-point drop on a specific timeline.

Condition 3: Your capital earns more elsewhere.

If your $120,000 down payment is currently deployed in a position returning 8% or more annually, delaying the illiquid commitment has real value. Over 18 months, $120,000 at 8% compounds to approximately $134,800. That $14,800 gain partially offsets the price appreciation loss. This is the one scenario where waiting has a defensible quantitative case, provided the rate drop materializes.

Worked Example 2: The Capital Opportunity Scenario

Buyer holds $200,000 targeted for a 20% down payment on a $1,000,000 home. Current rate: 7.0%. Target rate: 6.0%.

Buy now:

• Loan: $800,000 at 7.0%
• Monthly P&I: $5,322
• 60-month total payments: $319,320
• Down payment capital deployed: $200,000 (no longer earning)

Wait 18 months:

• $200,000 earns 8% annually in existing equity positions: ending value $224,800
• Home price at 4.1% annual appreciation: $1,062,000
• New down payment at 20%: $212,400
• Remaining investable surplus: $224,800 - $212,400 = $12,400
• New loan: $849,600 at 6.0%
• Monthly P&I: $5,092
• 60-month total payments: $305,520
• Rent paid during wait at $3,200/month: $57,600

Net cost to wait: $305,520 + $57,600 - $319,320 = $43,800 more expensive, minus the $12,400 surplus capital = net cost of $31,400 to wait.

Even with strong capital returns on the down payment, waiting costs more in a healthy appreciation environment.

The Four Numbers You Need Before Making This Decision

Before treating this as a gut call, collect these four data points. Each one feeds the calculation directly.

1. Your local 3-year price appreciation rate. Use the FHFA House Price Index for your metro, not national averages. Markets in the Southeast and Mountain West are running at 5.5% to 7.1% annually as of early 2026. Coastal California markets have slowed to 1.8% to 2.4%. The difference between those inputs is decisive.

2. Your current rent or housing cost. Every month you wait, this is cash with no equity return. Model it explicitly. Do not assume it is a fixed cost that cancels out. It does not cancel out.

3. The realistic rate scenario, not the optimistic one. The fed funds rate futures market prices in rate cut probabilities. Check the CME FedWatch tool before assuming a specific rate target. As of mid-2026, markets assign 34% probability to the 30-year fixed rate falling below 6.5% within 12 months. That is not a reliable planning assumption.

4. Your return on capital during the wait. If your down payment capital sits in a HYSA at 4.3%, the opportunity cost argument barely registers. If it is in equities targeting 9% to 10%, it matters more. Be precise about where the money actually is and what it is earning.

The Refinance Option Changes the Calculation

One scenario the buy-now camp consistently underweights: buying at today's rate and refinancing when rates fall.

If you buy now at 7.25% on an $800,000 loan and refinance to 6.25% in 18 months, the refinance costs approximately $8,000 to $12,000 in closing costs. Your new payment drops by $548 per month. Break-even on the refinance cost occurs at month 15 to 22 post-refinance.

Over a 60-month hold from original purchase, this path produces a total cost approximately $11,200 lower than the "buy now and hold at 7.25%" scenario, and approximately $38,000 lower than the "wait 18 months and buy at 6.25%" scenario in a market appreciating at 4% annually.

The buy-and-refinance path wins in most realistic market conditions. It captures the appreciation upside now and the rate upside later.

Run Your Actual Numbers

The scenarios above use representative inputs. Your inputs are different.

Your market's appreciation rate, your current rent, your down payment size, and your capital return assumptions all shift the output. A calculation built on national averages may point in the opposite direction from one built on your specific ZIP code and balance sheet.

The CalcMoney mortgage calculator lets you input your actual purchase price, your rate, and a custom appreciation assumption. It outputs total 60-month cost for both the buy-now and the wait scenario side by side.

That is the comparison that matters. Not the monthly payment. Not the rate headline. The total cost over your actual holding period, with your actual numbers.

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Run the buy-now-vs-wait comparison with your numbers in the CalcMoney mortgage calculator →