How this calculator works
A vehicle needs one MOT a year, so the number of vehicles on your books multiplied by the share that come back to you is a count of tests rather than a count of visits. That is the whole basis of the sum and it is why the page asks for a vehicle count rather than a weekly booking figure.
The value you enter is the whole visit, not the test fee. An MOT that finds nothing is worth the test fee. An MOT that finds two tyres and a pair of rear pads is worth considerably more, and the average across a year is the number that matters here. Most garages find the honest figure is well above the test fee and well below their best day.
The gap between where you are and where you could be is the only figure this page treats as recoverable. It does not assume you will reach 100%, because nobody does. Cars are sold, written off, moved out of the area and taken to a main dealer under warranty, and no reminder recovers those.
The headline figures are rounded to the nearest pound, because a projection across a year of vehicles does not carry meaningful pence. The working at the bottom of the calculator shows the exact figures, so the arithmetic still reconciles if you enter a value with pence in it.
Treat the result as an estimate for planning rather than a forecast. It is not a promise about what any particular change would deliver, and it is general guidance rather than financial advice.
Why MOT work walks
Very little MOT work is lost to a better garage. Most of it is lost to whoever gets in touch first. The customer is not loyal to a competitor, they are responding to the reminder that arrived while the date was still on their mind, and in a great many cases that reminder came from a national chain with an automated system rather than from the workshop that did the work last year.
The second cause is quieter and costs more. A garage that runs its reminders from a spreadsheet or a wall planner sends them reliably in February and stops sending them in August, because August is busy and the person who sends them is on holiday. The book does not show a problem for about fourteen months, by which time the cars are gone.
The third is the vehicle that changed hands. If your records are filed under the owner rather than the registration, a sold car disappears from your reminder list along with its new keeper, who has no idea you exist and lives four streets away.
What a realistic target looks like
There is no published standard and any figure quoted as an industry average should be treated carefully, because it usually turns out to describe a different kind of business. What is worth measuring is your own number, year on year, rather than somebody else's.
The practical point is that the first few percentage points are much easier to win than the last few. Moving from a position where reminders go out when somebody remembers, to one where they go out on a schedule nobody has to think about, is the change that shifts the number. Squeezing the final stretch means chasing vehicles that have genuinely gone.
Set the target above where you are and below perfection, run the sum, and then judge whether the gap is worth the effort of closing. That is a decision the arithmetic can inform but cannot make.
Reminders that keep working in August
The test of a reminder system is not whether it sent something last month. It is whether it will still be sending in the middle of your busiest week, when nobody has time to run a report.
Three things make that difference. The due date should be read from the registration rather than typed in by hand, because a typed date is a date that will eventually be wrong. The reminder should fire on a schedule rather than on somebody remembering. And the record should hang off the vehicle rather than the owner, so a car that changes hands stays on the list.
The follow-up matters as much as the first message. One reminder three weeks out catches the organised. A second nudge closer to the date catches everyone who meant to ring and did not, and that second message is usually where the recovered work actually comes from.
How Youzse Garage Pro handles MOT reminders
Typing a registration fills in the make, model, engine, fuel type and colour, and pulls the MOT history and the next due date with it. Nobody types a date, so nobody mistypes one. Reminders then go out automatically against that date rather than waiting for somebody to run a list.
Vehicle history sits against the registration rather than the owner, so the record survives the car being sold and the new keeper still receives the reminder. Advisories from the last visit stay attached to the vehicle, which is what turns a test booking into approved work when the car comes back in.
Youzse Garage Pro starts at £59 a month with a 30 day free trial that needs no card and no minimum contract. Card payments are charged at 2.5% plus 35p, and the Youzse platform fee sits inside that rate. There is 0% commission on new customers who find you through the Youzse directory.