Buy Now vs. Wait Calculator

How it works

Waiting to buy is a bet on two moving numbers: the price, which tends to rise, and the mortgage rate, which can go either way. This calculator grows the price by your expected appreciation, then prices the payment now and later so you can see both effects at once:

With the defaults, waiting two years at 4% appreciation lifts a $400,000 home to about $432,640, a $32,640 increase. On an 80% loan at 7%, the payment climbs from roughly $2,129 to $2,303 a month. Waiting pays off only if the extra you save for a larger down payment, or a drop in rates, more than covers that higher price and payment.

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A worked example: waiting two years on a $400,000 house

Say you're eyeing a $400,000 house but wondering whether holding off a couple of years might land you a better deal. At 4% yearly appreciation, waiting does the opposite: it adds $32,640 to the price.

That $400,000 home is projected to reach $432,640 in two years, and the $32,640 gap flows straight into your monthly cost. On an 80% loan at 7%, the payment climbs from about $2,129 to $2,303, a bump of +$174/mo for the same house. Waiting only pays off if a larger down payment or a lower rate more than cancels that increase.

Appreciation speed swings the stakes a lot. A slow 2% market adds just $16,160, while a hot 6% one tacks on $49,440, a $33,280 difference between the two. Run your own price and rate to see whether now or later wins for you.

Weighing the tradeoff

• Saving a bigger down payment helps, up to a point. More down shrinks the loan, but if the price climbs faster than you save, you are chasing a moving target.
• Rates cut both ways. If rates fall while you wait, the payment can drop even on a higher price. If they rise, waiting costs you twice. Nobody reliably predicts which.
• Buying sooner starts the equity clock. Every month you own, you build a little equity and stop paying rent, which the price-only view does not capture.

The cost of waiting people miss

This calculator shows what waiting does to the price and the payment, but the sticker figures aren’t the whole bill. Waiting has running costs that don’t appear in the projection, and they usually tilt the decision more toward buying now than the numbers alone suggest.

• The rent you keep paying. Every month you wait is another month of rent that buys you no equity, and over a couple of years that’s a large sum with nothing to show for it.
• The equity you don’t build. An owner spends those same months paying down a loan and, on average, watching the home appreciate, both of which a waiting renter forgoes.
• A moving target. If prices rise while you save, you may need a bigger down payment just to keep the same payment, so saving harder only partly catches up.
• The offset. Waiting wins mainly when you use the time to fix credit, kill high-interest debt, or land a rate low enough to beat the higher price.

Marry the house, date the rate

There’s an old line among buyers: marry the house, date the rate. It’s a reminder that the price you pay is permanent, but the rate usually isn’t. That reframes the waiting question in a useful way when rates are the thing holding you back.

If you buy now and rates later fall, you can refinance into the lower rate without buying the house over again, capturing the cheaper payment while keeping the price you locked in. But it doesn’t work in reverse: if you wait for a lower rate and prices climb in the meantime, you’re stuck paying the higher price permanently, with no way to undo it. That asymmetry is why a high rate on a fair price is often less risky than betting on a lower rate against a rising price.

The catch is that refinancing isn’t free and rates may not cooperate, so don’t buy a payment you can’t afford today on the promise of refinancing tomorrow.

How price and rate pull against each other

The projection lets you move price and rate at the same time, which matters because they often push in opposite directions. A higher price on a lower rate can land at a smaller payment than today, and the only way to know is to run both together.

Suppose you wait two years, the price rises from $400,000 to about $432,600 at 4% appreciation, but the rate you can get drops from 7% to 6%. On an 80% loan, the higher price at the lower rate can actually undercut today’s payment, because a full point off the rate outweighs the extra borrowed. Flip it, though, and the trap is obvious: if the price rises and rates also climb, waiting costs you on both fronts at once.

Set your honest best guess for each and let the payment change tell you which force is winning.