Cost of Waiting

Should you buy now or wait a year? The honest answer rests on three moving parts: what prices do, what rates do, and what you pay in rent while you decide. This calculator puts numbers on all three so the decision stops being a feeling.

One specific question: if I wait some number of months, how much more (or less) does the same home cost, counting the higher price, the rent paid meanwhile, and the change in my mortgage payment?

It does not forecast prices or rates. The defaults it ships with — 3% annual price growth, 4.49% if you buy now versus 4.99% if you wait — are illustrative starting values, not predictions or market quotes. The two rates are independent inputs, not a fixed spread off today's rate, so set each one to your own view of where rates are headed. It also does not model life: a new job, a new baby, or a landlord selling your rental can dwarf the arithmetic.

Your inputs, explained

Price if you buy now. What the home you want costs today, not a city average. Use the actual price of the home you'd buy — an average papers over exactly the gap this calculator is trying to price.

How long you'd wait (months). The slider runs 1 to 60 months, so it covers anything from "my lease ends in four months" to "I'm giving myself five years." Enter the wait in months, not years — 18 months is 18, not 1.5.

Annual price change. Your guess at how fast prices move while you wait, as a rate per year; the calculator pro-rates it over however many months you actually enter. It's labelled a guess on purpose — run it at 0%, at your best estimate, and at a pessimistic number too. The gap between those runs tells you more than any single number does.

Mortgage rate if you buy now. The rate you could lock in today, from a live quote or your broker — not a posted rate you saw in an ad.

Mortgage rate after waiting. A separate, independent rate for the "wait" scenario — not a delta or spread off today's rate. Set it to whatever you actually expect: the same number as today if you think rates will hold, lower if part of why you're waiting is a bet on cuts, higher if you think the opposite. The calculator never assumes the two rates move together.

Monthly rent while waiting. What you pay for housing during the wait, multiplied straight across the months you enter — no compounding, no assumed rent increases. It's usually the single biggest number behind "rent burned," so use your actual rent, not a rounded guess.

Down payment. Enter it as a percent or switch to dollars; either way, the calculator holds the same percent in both scenarios, so a higher future price means a larger down payment in dollars even though the percentage doesn't change. Canada's minimum rises with price — 5% up to $500,000, 10% on the slice above that, 20% at $1.5 million or more — and the calculator enforces whatever minimum your entered price requires.

How the math works

Both mortgages — buying now and buying after the wait — use the same formula this site uses everywhere: monthly rate = (1 + annual rate ÷ 2)^(2/12) − 1, not annual rate ÷ 12, because Canadian mortgages compound semi-annually by law, not monthly. Payment = principal × monthly rate ÷ (1 − (1 + monthly rate)^−300) — a fixed 300-payment, 25-year amortization in both scenarios. Waiting doesn't shorten the amortization; it just moves the starting line.

The future price compounds your annual price-change guess over the actual wait: price × (1 + appreciation ÷ 100)^(months ÷ 12). That future price sets both the "wait" scenario's mortgage principal and its down payment in dollars (same percent, bigger number).

Net cost of waiting adds three pieces: rent burned (rent × months, no compounding), the extra down payment the higher future price forces, and the payment difference between the two mortgages, annualized over one year (× 12) rather than the whole remaining amortization. That last choice is deliberate — it prices roughly what the first year after your decision actually costs, not a multi-decade projection built on a guess that far out.

The calculator also solves for a breakeven appreciation rate: holding every other input fixed, it searches the same −10% to 15% range the appreciation slider allows for the exact rate where net cost of waiting would hit zero, using fifty rounds of bisection. Because net cost rises steadily as appreciation rises, there's at most one such point. When your other numbers are strong enough that no appreciation rate in that range would flip the answer, it says so plainly instead of reporting a number past what the slider itself allows.

Worked example

A buyer in Ottawa is looking at an $800,000 home today and weighing an 18-month wait. She enters: 3% annual price growth (a guess, not a forecast), 4.85% if she buys now, 4.50% if she waits (part of why she'd wait is a bet that rates ease), $1,400 a month in rent while she waits, and 20% down in both scenarios.

Price if you wait. $800,000 × (1 + 3 ÷ 100)^(18 ÷ 12) = $800,000 × 1.045336 ≈ $836,269. At 3%/yr for 18 months.

Extra down payment needed. 20% of $800,000 is $160,000; 20% of $836,269 is $167,254. The gap is $7,254 — to keep the same 20% down on the higher price.

The two payments. Buying now: $800,000 − $160,000 = $640,000 borrowed at 4.85%, 25-year amortization → $3,668/month. Waiting: $836,269 − $167,254 = $669,015 borrowed at 4.50% → $3,703/month. Even with a lower rate, the larger loan on the higher price still costs more — a $35/month payment difference, per month for the life of the mortgage.

Rent burned while waiting. $1,400 × 18 = $25,200.

Net cost of waiting. $25,200 rent burned + $7,254 extra down + $420 (12 months of the $35 payment difference) = $32,874 — the figure the calculator headlines as "Net cost of waiting 18 months." Under these numbers, buying now wins by about $32,874 over waiting.

Breakeven appreciation rate. The calculator also asks the reverse question: how pessimistic would the price guess have to be for waiting to break even? Holding everything else fixed, it finds −8.0%/yr — appreciation would need to fall to about −8%/yr, from the 3%/yr entered, for waiting to break even. That's a genuinely bad stretch for prices, not a small miss, which is itself the finding: on these numbers buying now is the safer call across a wide range of price outcomes, not just the one guessed here.

A crossing point doesn't always exist, and it usually doesn't. Run the calculator's own shipped defaults instead — a $700,000 home, a 12-month wait, 3%/yr price growth, 4.49% now versus 4.99% after waiting, $2,800 a month in rent — and net cost of waiting stays positive across the entire −10% to 15% slider range ($39,144 at the 3% default, still $24,333 even at the most pessimistic −10%/yr the slider allows). The calculator reports that honestly rather than extrapolating past its own bounds: buying now still wins under those assumptions because the rate gap and the rent burned are doing the work, not the price guess.

Provincial quirks and edge cases

In Toronto, where the tax roughly doubles with the municipal levy, two years of 3% price growth adds about $1,700 in extra land transfer tax on a $650,000 home. In Alberta, with no land transfer tax, the price increase is the whole story.

First-time buyer relief has price ceilings that waiting can breach. BC's full exemption phases out to zero at $860,000; a home at $840,000 today growing 3% a year crosses $890,000 in two years and the exemption is gone. Ontario's $4,000 refund caps out at $368,000 regardless, so waiting changes nothing there.

A higher future price doesn't only mean a bigger mortgage and a bigger down payment — in every province except Alberta, it also means more land transfer tax at closing, since LTT is calculated as a percentage of the purchase price. This calculator doesn't add that cost in; run your "price if you wait" figure through the Land Transfer Tax calculator to see the real gap.

If waiting pushes the price to $1.5 million or above, Canada's minimum down payment jumps straight to 20%. This calculator enforces that floor automatically once your entered price crosses the line — it's a bigger swing than any other input here.

Questions to ask a professional

1. Ask your mortgage broker: is my pre-approval still valid if I wait, and how would a rate change alter what I qualify for?
2. Ask your broker: if the price crosses $1.5 million while I wait, how does the minimum-down-payment jump to 20% change what I need saved?
3. Ask a financial planner: if I keep renting during the wait, is the gap between rent and a mortgage payment actually going somewhere useful, or does it just get spent?
4. Ask your lawyer: are there any time-limited rebates or programs I would age out of or price out of by waiting?