How to Stop Chasing Timesheets on Slack and Teams

Pick any manager at a client-service company and ask about the last week of the month. A common answer: a growing list of names in a spreadsheet, a Slack or Microsoft Teams message that says some version of "please fill in your timesheet," sent to the same three people, again. This is not managing. It is nagging, and it happens every single month at agencies, consultancies, and software houses of every size - including the 1,000-person ones.

The frustrating part is that this problem is not a people problem. It is a tooling problem, and it has a straightforward fix.

To stop chasing employees for timesheets, take the manager out of the reminder loop. Send an automatic reminder before each week locks, let managers approve submitted hours in one click from an email, and lock past periods so billed hours stop changing. The deadline then enforces itself, and nobody has to nag.

Why timesheets go missing

Nobody skips a timesheet out of malice. It happens because filling it in has no natural trigger. Unlike a calendar invite or a Slack mention, an empty timesheet does not interrupt anyone. It just sits there, quietly, until someone with billing on their mind remembers to go looking for it - usually a day before invoices are due.

Add a few real-world complications and the problem compounds:

• Contractors and rotating teams. Agencies work with a mix of employees and contractors, and people move between clients and projects. Nobody owns "chasing timesheets" as a job, so it falls to whoever notices first, usually a manager who has better things to do.
• Multiple approval layers. A submitted timesheet is not a finished timesheet. Someone still has to review and approve it, and that step is just as easy to forget as the original entry.
• No consequence for lateness. If nothing locks, changes, or blocks after a deadline passes, there is no natural pressure to finish on time - only the manager’s patience, which runs out fast in the last week of the month.

What "chasing" actually costs

The visible cost is time: the minutes spent typing reminders, checking who has and has not submitted, and following up again. The bigger cost is what it delays. Client invoices cannot go out until the hours behind them are complete and approved. A single missing timesheet from one contractor can hold up billing for an entire team, pushing revenue recognition into the next month and straining the relationship with a client who is, reasonably, asking where their invoice is.

There is a quieter cost too: trust. Managers who spend their time nagging are not spending it on the actual job - unblocking people, reviewing work, planning the next sprint. Every month-end chase is time stolen from managerial work that actually matters.

Automate the reminder, not the pressure

The fix is not a stricter policy or a scarier message. It is removing the manual step entirely. With automatic weekly locking on, Sandtime.io’s timesheet reminders email everyone who has opted in every Friday at 6 PM in the organization’s time zone, before the week locks, so the reminder comes from the system instead of a manager’s inbox.

That alone solves the "forgot to ask" problem. The rest of the chain closes the loop:

1. Reminders go out automatically, so timesheets get filled without anyone having to ask.
2. Approvals happen with one click, directly from the email every Administrator receives when a week is submitted, so routine reviews do not mean logging in and clicking through the app.
3. Approved and past weeks lock: an approved week locks at once, and with automatic locking on every past week locks when the next one begins, so the numbers used for billing stop moving.
4. Overlap detection flags entries that overlap - like a running timer and a meeting added by hand for the same hour - before they reach a client-facing report.

Put together, this is not a single feature. It is a chain that starts with a reminder and ends with a locked, approved, billable record, without a manager typing a single follow-up message.

What this looks like in practice

A software house running four client teams turns on automatic locking, and everyone switches on the reminder email in their notification settings. Every Friday at 6 PM, two days before the week locks, the reminder arrives, so nobody has to work out who still owes hours. When someone submits a week, the Administrators get an email with its summary and an Approve button, and approve it before their coffee is done. By the time payroll or invoicing needs the numbers, every timesheet is in, approved, and locked. Nobody sent a single "please fill your timesheet" message that month.

Free for the whole team

None of this requires a premium tier or a seat limit workaround. Sandtime.io is free for unlimited users - reminders, approvals, and locking included, whether the team is three freelancers or a 1,000-person software house billing a dozen clients at once.