How to calculate your clock-out time from your productivity target
Paid minutes keep running after your last patient leaves.
To calculate your clock-out time, divide the treatment minutes you've delivered by your productivity target. Add the result to your start time, along with any unpaid break. The result is the latest you can leave and still be on target if you treat no one else.
The longer you stay without treating, the lower your percentage goes. Your treatment minutes stop when your last patient leaves, and your paid minutes carry on until you clock out.
How to calculate clock-out time
Paid minutes at target = treatment minutes ÷ (target ÷ 100)
Clock-out time = shift start + paid minutes at target + unpaid break
The break is added back because it sits inside your working day but outside your paid time. The calculation assumes your paid time ends when you clock out, as it does with hourly pay. It also assumes the unpaid break is already taken.
Round the answer down to the whole minute. Rounding up adds part of a paid minute and can put you just under target.
Worked example
Example: you started at 08:00, take a thirty-minute unpaid lunch, your target is 85%, and you've delivered 300 minutes of treatment.
- Paid minutes that keep you at target: 300 ÷ 0.85 = 352.9 minutes
- Add the break: 352.9 + 30 = 382.9 minutes from the start of the day
- Rounded down, that is 382 minutes, or 6 hours 22 minutes
- Clock-out at 14:22
Check it: leaving at 14:22 gives 352 paid minutes, and 300 ÷ 352 = 85.2%. Leave before 14:22 and you finish higher. Leave after it and you drop below 85%, unless you treat someone else in the meantime.
Clock-out time in the therapist productivity calculator
The therapist productivity calculator has a "Shift started" field and shows the latest clock-out at target. To get your clock-out time, enter your shift length, unpaid break, treatment minutes, target and start time.
- If you're below target, it shows start + treatment minutes ÷ target + unpaid break, the time worked out above.
- If you're already at or above target for the whole shift, it shows the end of the shift. Working to the end keeps you on target.
The calculator also rounds the clock-out down to the whole minute, so in the example it shows 14:22.
Why staying late costs you
Every extra paid minute after your last treatment adds to the paid minutes and nothing to the treatment minutes.
Example: 383 treatment minutes on an 08:00 to 16:00 shift with a thirty-minute unpaid break is 383 ÷ 450 = 85.1%. Stay an extra thirty minutes to finish notes and you have 383 treatment minutes across 480 paid minutes, which is 79.8%. Half an hour of paid documentation cost 5.3 points.
In the US, work the employer suffers or permits off the clock still counts as hours worked under the federal wage rules. This measure hides that work, because documenting on the clock lowers your percentage and documenting off the clock doesn't. Whether those notes count as hours worked is set out in the guide to unpaid documentation time.
The reverse: how early would I need to leave?
If you're below target and out of patients, the same calculation tells you what leaving early would achieve.
Example: 320 treatment minutes, an 85% target, an 08:00 start and a thirty-minute break. Paid minutes at target: 320 ÷ 0.85 = 376.5. Add the break and you get 406.5 minutes from the start, which rounds down to 14:46. If it's already 15:30, that time has passed. Leaving now gives 320 ÷ 420 = 76.2%. Working to the 16:00 end of the shift gives 320 ÷ 450 = 71.1%.
Two caveats before anyone acts on this. It only works if your employer measures worked time rather than scheduled hours, and leaving early has to be agreed rather than assumed. The calculation tells you what the number does. It doesn't tell you what your contract allows.
Reference table: clock-out time by treatment minutes
Assumes an 08:00 start, a thirty-minute unpaid break and an 08:00 to 16:00 shift (450 paid minutes). Every time is rounded down to the minute.
| Treatment minutes | Target 80% | Target 85% | Target 90% |
|---|---|---|---|
| 240 | 13:30 | 13:12 | 12:56 |
| 280 | 14:20 | 13:59 | 13:41 |
| 320 | 15:10 | 14:46 | 14:25 |
| 360 | 16:00 | 15:33 | 15:10 |
| 400 | 16:50* | 16:20* | 15:54 |
| 440 | 17:40* | 17:07* | 16:38* |
Read it as the latest moment you can stop the clock and still be on target. Up to 16:00, the calculator rounds down the same way and shows the same times.
* After the 16:00 end of the shift. With that many treatment minutes you're already on target for the full shift, so the calculator shows 16:00. The later time is how long you could stay, for example to finish notes, and still be on target, where staying is paid and agreed.
A higher target gives an earlier clock-out for the same work. It allows fewer paid minutes without treatment, and every paid minute you spend without a patient is one of them.
Using it at lunchtime
Run the number at midday and compare it with the time your last patient is booked. It shows whether the afternoon needs another treatment while there's still time to book one.
Example: it's 13:00. You started at 08:00, your shift runs to 16:30 with a thirty-minute unpaid lunch already taken, so you have 480 paid minutes. Your target is 85% and you have 250 treatment minutes.
- Paid minutes at target: 250 ÷ 0.85 = 294.1
- Add the break: 324.1 minutes from the start, which rounds down to 13:24
At 13:00 you're still on target, with 24 minutes to spare. If you billed nothing more, you could leave at 13:24 and finish at 250 ÷ 294 = 85.0%.
Your two booked afternoon patients at 45 minutes each add 90 minutes, taking you to 340 treatment minutes. Paid minutes at target: 340 ÷ 0.85 = 400. Add the break and the clock-out is 430 minutes from the start, or 15:10. If you work to the 16:30 end of the shift, you finish at 340 ÷ 480 = 70.8%. On an 08:00 to 16:00 shift (450 paid minutes) the same day ends at 340 ÷ 450 = 75.6%. Either way, you know at 13:00 rather than when the shift ends.
Using it to protect documentation time
Run the calculation in reverse and it shows how much on-the-clock time you have for notes.
Example: your last patient finishes at 15:20 and the clock-out calculation gives 15:50. You have 30 minutes of paid documentation time before you drop below target. Knowing the exact figure lets you plan the notes instead of guessing.
When the calculation doesn't apply
Three situations break it. If your employer measures scheduled hours rather than worked hours, leaving early changes nothing and staying late costs nothing, because the paid minutes are fixed. If you are salaried with fixed hours, you may not be able to leave early whatever the arithmetic says. And if productivity is averaged weekly, one day's clock-out matters less than the week's total.
Check which of these applies before making a habit of it. For the week, the weekly productivity calculator shows what you need on each remaining day. The billable minutes needed guide turns a shortfall into patients.
What the calculation shows about the measure
Documentation is paid time without a patient, so it lowers the percentage in every version of this calculation.
That is the case for counting documentation as productive time, or for setting the target low enough to allow for it. A measure that lowers the score for the paperwork it also requires pushes that paperwork out of paid hours. For the other part of the paid minutes, read the guide to whether a lunch break counts against productivity.