Rounding Time to a Tenth of an Hour: The 6-Minute Increment Explained

01

What the federal rule allows

The rounding rule is in 29 CFR 785.48(b) (read September 8, 2026). It recognizes that some employers record time to the nearest 5 minutes, one-tenth of an hour, or quarter hour. It accepts the practice "provided that it is used in such a manner that it will not result, over a period of time, in failure to compensate the employees properly."

Two things follow from that sentence. Rounding to the nearest tenth is one of the three named increments, so it is an accepted practice. And the acceptance has a condition: the rounding has to be neutral. A system that rounds clock-ins up and clock-outs down, or one that always rounds in the employer's favor, fails the condition even though the increment is on the list. The broader rules are in Timesheet Rounding Rules Explained.

02

Minutes to tenths: the conversion chart

An hour has 60 minutes and a tenth of an hour has 6. Rounding to the nearest tenth means finding which 6-minute mark a punch is closest to. Because 3 minutes is exactly halfway between two marks, the convention rounds it up.

So 7:02 becomes 7.0, 7:04 becomes 7.1, 7:33 becomes 7.6, and 7:58 becomes 8.0. The most any single punch moves is 3 minutes, and it moves toward the nearer mark, with the 3-minute tie going up. Moving in both directions is what keeps the method neutral.

03

A week of punches, rounded to tenths

Here is one worker's week with a 30-minute unpaid lunch each day. The exact column is the real minutes worked after lunch, shown in decimal. The rounded column applies the chart to the clock-in and the clock-out, then subtracts the lunch.

Walk through Monday. The 7:02 clock-in is 2 minutes past the hour, so it rounds down to 7.0. The 3:34 clock-out is 34 minutes past 3, which falls in the 33 to 38 band, so it rounds to 15.6. That's 8.6 hours on the clock, minus 0.5 for lunch, for 8.1 paid hours. The exact time was 8 hours and 32 minutes on the clock, minus 30 minutes, for 8 hours and 2 minutes, which is 8.03 in decimal, so Monday rounds 4 minutes in the worker's favor.

Wednesday goes the other way. The 7:04 clock-in rounds up to 7.1 and the 4:08 clock-out rounds down to 16.1, for 9.0 hours on the clock and 8.5 paid. The exact time after lunch was 8 hours and 34 minutes, or 8.57. Wednesday rounds 4 minutes in the employer's favor.

Over the week the differences cancel: two days up, two days down, one day even, and the rounded total of 39.7 matches the exact total of 39.70. That is what the regulation means by neutral over a period of time. A system that produced five days of small losses for the worker would fail the condition. At $25 an hour, one tenth is $2.50, and a pattern of one tenth a day against the worker is $12.50 a week and $650 over 52 weeks for one person.

04

Tenths compared with quarter hours

Quarter-hour rounding uses 15-minute increments with a 7-minute split, which is the rule most people know as the 7-minute rule. We cover it in The 7-Minute Rule for Time Clocks, with Examples and the chart version in The 7-Minute Rule and Quarter-Hour Time Clock Rounding, With Chart.

Tenths are finer than quarters, so each rounded punch stays closer to the real time and the neutrality condition is easier to meet. Both methods are on the regulation's list.

Tenths make sense when the system downstream wants decimal hours. Most payroll systems take hours as decimals, and 8.1 imports cleanly where 8:06 does not. Time-and-materials billing is the other common case: if a contract bills labor in tenths, the timesheet and the invoice use the same unit.

05

The pitfalls

• Rounding in one direction. Rounding every clock-in up and every clock-out down is not neutral and fails the condition in 785.48(b), whatever the increment.
• Rounding the total instead of the punches, and then rounding the punches too. Pick one. Rounding twice compounds the error.
• Mixing tenths and quarters. A crew tracked in tenths and a payroll system that rounds again to quarters produces a number nobody can trace back to the punch.
• Treating small minutes as free. The rules on very small amounts of time are narrow, and we cover them in De Minimis Time: What Small Minutes Cost You.
• Rounding without telling the crew. If a worker's phone shows 7:04 and the timesheet shows 7:06, expect a question every week. Put the rule in writing.

06

Why exact minutes remove the question

Rounding is a habit from paper time cards and punch clocks, where adding odd minutes by hand was slow. A phone app records the exact minute, so the total is exact and there is nothing to round. That also removes the neutrality test, because a record that never moves a punch cannot fail to compensate properly over time.

Decimal hours are a display choice rather than a rounding choice. An exact 8 hours and 2 minutes is 8.03 in decimal, and payroll can take that as is. If a payroll system or a billing contract wants one decimal place, round the decimal total before import and keep the exact-minute record as the record of hours worked. For a paper card, the time card calculator does the minutes-to-decimal arithmetic.

07

What this looks like in Clox

Clox records the exact minute of every clock-in, clock-out, and break from the worker's phone, and the punch record keeps that minute. Rounding is a separate, optional setting. Round shifts lives under Settings, then Shift behavior, and it is a personal setting: each person rounds their own shifts, so you set it on every account that needs it. It rounds each shift to the nearest interval, and the choices are Off, 5, 10, or 15 minutes. It is Off by default, and there is no 6-minute option, so Clox does not round to tenths directly.

The order of operations is raw clock-in to clock-out, minus logged breaks, then rounding, then the auto-lunch deduction. That final number is the paid time on timesheets and exports. The overtime and break rules docs show where the setting lives.

The Reports page has a Format switch between h:mm (8:30) and decimal (8.50), and the CSV, Excel, and PDF exports follow it. Details are in the reports and exports docs.

A crew paid in tenths has two options. The direct one is to leave Round shifts off, export in decimal, and let payroll round the decimal hours to one place. The other is to pick the 5-minute setting as the closest option to a tenth. A 5-minute total does not land on a tenth (8 hours and 5 minutes is 8.08), so payroll still rounds the last step.

Either way the punch record stays at the exact minute, so the number you pay from traces back to the minute the worker tapped the button. When a worker asks why the timesheet shows 8.03, the answer is that they clocked in at 7:00, clocked out at 3:32, and logged a 30-minute lunch.

08

FAQ

Your state may have its own position on rounding, so check with your state agency or an employment attorney before you adopt a rounding policy. This is general information, not legal advice.

Clox is free for 14 days with no credit card required, and there's a 30-day money-back guarantee on the first paid subscription. Start a free trial, have the crew clock one real week from their phones, and export it in decimal to see what exact minutes look like next to what you pay now.