Ask what a vacant unit costs per day and you will be given the same formula everywhere:
monthly rent ÷ 30 × days vacant
A unit at $1,500 a month is "$50 a day". Twenty days vacant is "$1,000". The arithmetic is clean, it is easy to put in a spreadsheet, and it is the number most operators budget with.
It is also wrong in two directions at once. It understates what the vacancy actually cost you, and it hides the only part of it you could have done anything about.
The formula everyone uses, and the three costs it leaves out
Rent forgone is real. It is just not the whole bill.
Turnover cost. A unit between tenants is not simply earning nothing — it is spending. Cleaning, paint, repairs, the make-ready punch list, the leasing labour, the advertising. In the United States, the National Apartment Association's 2024 Income/Expense IQ puts leasing expenses at $292 per unit, up 4.6% on the year, and attributes that rise largely to a 17.5% year-over-year increase in turnover costs. Read that carefully: it is the rate at which turning a unit got more expensive, not the cost of turning one. Your own number is yours, and section 7 is about finding it.
Carrying cost that does not pause. Taxes, insurance, utilities you cover while the unit is empty, financing. NAA put total US operating expenses at $8,657 per unit for 2024. A share of that keeps running on an empty unit, and it is a share you can calculate.
The cost of the wrong tenant, taken in a hurry. This one never appears in a per-day figure and it is frequently the largest. A vacancy that has run long enough to become uncomfortable is where standards quietly slip. That is a real cost of a long vacancy, and it argues for shortening the days rather than lowering the bar.
Add the first two to rent forgone and the honest per-day number is meaningfully higher than rent ÷ 30. Which matters, because every day you remove is worth more than you thought.
Four clocks, not one
"Days vacant" is not one measurement. It is four, they have different owners, and only some of them are yours to compress.
- Notice → move-out. Set by the lease and by law. Not yours to change. It is also pure opportunity: the unit is still paying you and you already know it is coming.
- Move-out → make-ready done. Trades, materials, scheduling. Yours, operationally.
- Ready → application in hand. Marketing, inquiries, showings, screening. This is the clock leasing software actually touches, and it is the one this article is about.
- Application → lease start. Decision, paperwork, and the applicant's own moving date. Partly yours, partly theirs.
Two operators with identical twenty-day vacancies can have completely different problems — one lost fourteen days waiting on a countertop, the other lost fourteen days between the listing going up and the first qualified applicant. The single number cannot tell them apart, so it cannot tell either of them what to fix.
Clock 1 is also where most of the recoverable time hides, because it is the only clock that runs while you still have a paying tenant. Every day of clock 3 you can move into clock 1 — by starting to market before the unit is empty — is a day that costs nothing.
The same arithmetic, three property types
Here is where the single portfolio-wide number stops being merely imprecise and starts being misleading. Run the same method across three property types and you get three different answers, for structural reasons.
A furnished city one-bedroom. Highest rent per unit, so the highest rent forgone per day, and the shortest tolerable vacancy. Tenancies are shorter by design, so it turns over most often, and turnover cost lands on it several times more frequently than on anything else you own. High per-day cost, high frequency: the compounding is the worst in the portfolio.
A walk-up building. Lower rent per unit, but units are near-identical and concentrated at one address. Make-ready is efficient. Showings are efficient — one trip, several units. The per-day cost is lower and the leasing effort per unit is lower, so the same twenty days hurts noticeably less here than in the first case.
Scattered single-family homes. Highest rent per unit outside the furnished case, and by far the highest cost per leasing action. Every showing is a drive. Every make-ready is a separate trade visit to a separate address. Turnover is less frequent — households stay longer — but when it happens, clock 3 stretches because the logistics do. And in Canada these are largely outside the purpose-built rental universe that CMHC surveys, so a Canadian operator holding them cannot look up a benchmark that describes their own stock.
Three property types, three per-day costs, three turnover frequencies, three different clocks doing the damage. Averaging them produces a number that describes none of them.
Two worked examples
Same method, two countries, both currencies stated. The market figures below are published and sourced; the property inputs are assumptions for the arithmetic, and yours will differ. That distinction is the whole point of section 7.
A 60-unit low-rise in Ohio
Assume an average rent of $1,200 USD and 20 days vacant on a turn.
- Rent forgone: $1,200 ÷ 30 × 20 = $800 USD
- Turnover cost, assume $1,400 USD for cleaning, paint, repairs and leasing labour
- Carrying costs that did not pause, assume $180 USD over the period
- Total: roughly $2,380 USD for one turn — against the $800 the standard formula reports
The standard formula captured about a third of it. And at 60 units with, say, a fifth turning in a year, that is twelve turns: the difference between the two methods is the difference between budgeting $9,600 USD and budgeting $28,560 USD.
For market context rather than for the arithmetic: the US Census Bureau put the national rental vacancy rate at 7.3% in the second quarter of 2026, against 7.0% a year earlier. A US operator is leasing into a soft market, which lengthens clock 3 and raises the value of every day removed from it.
22 scattered single-family homes in Alberta
Assume an average rent of $1,900 CAD and 30 days vacant, because scattered stock takes longer.
- Rent forgone: $1,900 ÷ 30 × 30 = $1,900 CAD
- Turnover cost, assume $2,200 CAD — higher per event, since every trade attends a separate address
- Carrying costs, assume $300 CAD
- Total: roughly $4,400 CAD for one turn
Turnover here is less frequent, so the annual bill may well be smaller than the Ohio building's despite each event costing more. That is the point: frequency and severity are separate numbers, and one portfolio-wide per-day figure collapses both.
For market context: CMHC reported Canada's national vacancy rate for purpose-built rentals at 3.1% in 2025, up from 2.2% in 2024, with the average Canadian two-bedroom rent at $1,550 CAD, up 5.1%. Within Alberta, CMHC put Calgary at 5.0% and Edmonton at 3.8% for 2025. The comparison worth drawing is not with the US number — see the next section — but with CMHC's own view of balance: it considers 3.5%–6.0% a balanced range for Edmonton, so that market is inside its normal band while Calgary sits at the loose end of a 3.0%–5.5% band.
Turnover as a second line item, and where the two markets stop comparing
If you take one measurement away from this article, make it turnover frequency. Per-day cost tells you what a vacancy costs. Turnover rate tells you how often you pay it, and it varies far more than most operators expect.
CMHC publishes tenant turnover rate for Canada as a standard series, and the spread inside it is remarkable. Broken out by rent quartile for 2025, CMHC reported Canadian turnover in Edmonton running from 22.5% in the least expensive quartile to 33.6% in the most expensive, while Toronto ran from 7.9% to 12.1%. A Canadian operator with buildings in both cities is paying turnover cost roughly three times as often in one as in the other, on units that might otherwise look comparable on a spreadsheet.
Now the part you need in order to use any of this. These two markets are not comparable and their headline numbers must never be averaged:
- Different universes. The US Census figure covers all rental housing, including scattered single-family homes. The CMHC figure covers purpose-built rental apartments only, with condominium apartments surveyed separately. The same portfolio can appear in one and be absent from the other.
- Different clocks. Census reports quarterly; CMHC's headline vacancy comes from an annual October survey. The two figures above are up to nine months apart.
- Genuinely different conditions. US vacancy is at a multi-year high. Canadian vacancy is rising off historic lows and is still less than half the US rate. A blended figure would describe neither country.
And one asymmetry that is directly useful: CMHC publishes a turnover rate; there is no equivalent public US national series. The Census vacancy release contains no turnover measure, and NAA's benchmarking covers turnover cost, not frequency. So a Canadian operator can look their turnover rate up. A US operator has to measure their own — which, as it happens, is section 7.
Why one leasing setup across every property type quietly costs you days
Look back at clock 3 — ready to application in hand — and notice that it is the only clock where the same process is usually applied to every property in the portfolio.
The walk-up and the scattered houses need different things. The walk-up benefits from tight scheduling and grouped showings. The scattered homes need travel built into the showing calendar and screening that reaches a decision before somebody drives forty minutes. The furnished one-bedroom needs speed above everything, because its per-day cost is the highest you own. One process across all three is tuned for none of them, and the cost shows up as days on clock 3 — the clock you were most able to shorten.
Releaser offers custom configuration for different property types, so the walk-up and the scattered homes do not have to run the same leasing process. You configure each property yourself, on its own terms, rather than accepting one shape for the whole portfolio.
That is control rather than presets — the software does not arrive with an opinion about what a triplex needs. You decide, per property, and the tool stops forcing one shape onto a mixed portfolio.
The four inputs only you can supply
Published benchmarks tell you what your market is doing. They cannot tell you what a vacant day costs you, because four of the inputs exist only in your own records.
- Your real days vacant, split across the four clocks. Not days on market — the whole gap, from move-out to lease start, with the four segments recorded separately. Without the split you cannot tell a countertop problem from a leasing problem.
- Your actual turnover cost per event, by property type. Add up one recent turn per type from invoices: cleaning, paint, repairs, materials, leasing labour, advertising.
- Your turnover frequency, by property type. How many of your units turned in the last twelve months, counted separately for each type. Canadian operators can sanity-check against CMHC's turnover series; US operators are measuring this for the first time.
- The carrying costs that do not pause. The share of taxes, insurance, utilities and financing that runs whether or not the unit is occupied.
Starting Monday, the cheapest version of this is a spreadsheet with one row per turn and six columns: property type, move-out date, make-ready complete, listed, application accepted, lease start. Three months of that beats any benchmark, because it is about your buildings. For a market rent reference while you build it up, US operators can use the Zillow Observed Rent Index, which publishes at metro, city and ZIP level; Canadian operators can use CMHC's Rental Market Survey data tables, which carry vacancy, average rent, turnover rate and universe count by centre.
Then run the arithmetic separately for each property type. You will almost certainly find that one type is quietly carrying the portfolio's vacancy cost, and that the days you can actually recover are sitting on clock 3, in the process you have been applying identically to buildings that are not alike.
Releaser is available to property management firms in the United States and Canada, with custom configuration for different property types, so a mixed portfolio does not have to run one leasing process.
Sources. Canada: CMHC 2025 Rental Market Report (published 11 December 2025) and the 2026 Mid-Year Rental Market Update (published 9 June 2026). United States: US Census Bureau, Housing Vacancies and Homeownership, Q2 2026 (released 28 July 2026) and the National Apartment Association on its 2024 Income/Expense IQ (published 22 December 2025).