How to Export Timesheet Data for Payroll Processing

The bridge between timesheets and payroll is broken in most small businesses. Workers record their hours. Someone exports data. That data goes into the payroll system. Somewhere in that process, format mismatches happen, workers go missing, and the payroll team spends three hours chasing discrepancies instead of processing the next pay run. This guide covers how to export timesheet data for payroll processing cleanly, on schedule, and with minimal friction.

What data does your payroll system actually need?

Your payroll system is only as good as the data flowing into it. At minimum, you need to export:

Worker identifier (name, employee number, or payroll ID — pick one and use it consistently)
Total standard hours worked in the period
Overtime hours (usually separated by tier — time-and-a-half, double-time, etc.)
Weekend or holiday hours (if paid at a premium rate)
Absence hours (sick leave, annual leave, other absence types — and which type)
Adjustments or deductions (if they relate to time)

Beyond that, requirements vary. Some payroll systems want individual shift records. Others need cost centre allocations for internal billing. Some accept decimal hours (7.5), others demand hours and minutes (7:30). The key is to understand what your specific payroll system expects before you start exporting. Check the import documentation or ask your accountant. An hour spent getting this right once saves you a headache every pay period.

When you set up a timesheet system for your small business, that setup conversation should include: "What format does payroll need?" If the answer is "we don't know yet," treat that as a blocker. Timesheets without a clear payroll pipeline are just a way to record history — not a way to run payroll.

How to export timesheet data: four methods

Manual re-entry (the slow path)

Someone reads the timesheet and types it into payroll. It's slow, error-prone, and doesn't scale. Yet it remains the default for businesses using paper timesheets or disconnected spreadsheets. If you're doing this, the good news is: every other method is faster.

CSV or spreadsheet export (the common path)

The timesheet system produces a CSV or Excel file. You open the payroll system, click "import," select the file, and watch the data load. No re-typing. No calling workers for their hours. This eliminates the biggest failure point and works well for businesses up to 50 or so workers.

The catch: the export file must match the payroll system's expected format. Column headers must align. Date formats must match (DD/MM/YYYY vs MM/DD/YYYY can break a whole import). Number formats have to agree. Most decent timesheet platforms let you configure the export template to match your payroll provider's requirements. Test with a small batch before you run the full export.

Direct integration (the frictionless path)

The timesheet system connects to payroll via an API. When timesheets are approved, the hours push automatically. No file transfer. No format matching. No manual export at all. This is the future — and it requires both your timesheet and payroll systems to support it. If they do, use it. If they don't, ask them why.

Payroll bureau or accountant (the delegated path)

You export data from your timesheet system and send it to the bureau. They process it on your behalf. The key is to agree on the format and schedule before the first export. A professional bureau will specify exactly what they need and when they need it. If yours doesn't, ask.

Building your export process: five steps

Step 1: Agree the data format in writing

Before the first export, confirm:

File type (CSV, XLSX)
Column order and headers
Date format (DD/MM/YYYY is UK standard, but verify with your payroll provider)
Number format (decimal hours like 7.5 vs hours and minutes like 7:30)
Worker identifier (payroll number, national insurance number, employee ID)
How overtime is represented (separate column? Separate rate code?)
How absences are represented (which absence types map to which payroll codes?)

Send this specification to your payroll provider or accountant in writing and get confirmation back. This is not bureaucratic busy-work — it's the one conversation that prevents a dozen firefighting exports later.

Step 2: Align your approval cycle with the payroll deadline

Timesheets must be approved before export. The approval deadline must come early enough that the export, verification, and payroll processing all complete before payday. A typical week-long schedule might look like:

Friday: Workers submit timesheets
Monday morning: Managers approve (with automated reminders for stragglers)
Tuesday morning: Approved timesheets exported
Tuesday afternoon: Data validated and reconciled
Wednesday: Payroll processed and queued for payment
Friday: Pay hits workers' accounts

Adjust this timeline for your pay cycle (weekly, bi-weekly, monthly), but always preserve a buffer between "export complete" and "payroll deadline" for dealing with problems. If you're exporting on Thursday morning and payroll must run Friday morning, you have no time to fix discrepancies.

Step 3: Validate before you export

This takes five minutes and prevents 90% of payroll errors. Before sending the export to payroll, ask:

Does the worker count in the export match your current headcount?
Are there any workers with zero hours who should have worked?
Are there any workers with unusually high or low hours (a sign of a data entry error)?
Do overtime hours look reasonable for your business?
Have all known absences been recorded?

If something looks wrong, investigate before proceeding. A worker with 200 hours in a two-week period probably isn't working seven 14-hour days — they probably aren't in the system at the right pay rate, or their timesheet wasn't rounded correctly.

Step 4: Process and reconcile after payroll

After payroll runs, compare the output (gross pay per worker) to your timesheet data. If they match, you're done. If they don't, the most common causes are:

A pay-rate change that was updated in one system but not the other
Overtime applied at the wrong rate
Absence codes misinterpreted (e.g., "sick leave" coded as unpaid when it should be paid)
A new starter added to the timesheet system but not yet to payroll (or the reverse)

When calculating staff costs per project using timesheet data, these reconciliation issues become visible quickly. Use them as an early warning signal. Don't just process the payroll and move on.

Step 5: Archive every export

Keep a copy of every timesheet export file alongside your payroll records. HMRC requires employers to keep payroll records for at least three years from the end of the tax year they relate to. Under UK Working Time Regulations, you must keep adequate records showing compliance with working-time limits. If a dispute arises later — a worker querying their pay, a tax audit, an employment claim — you need to trace the payroll figure back to the timesheet.

This is not paranoia. It's the difference between resolving a dispute in an afternoon and spending a week reconstructing data.

Common export problems (and how to fix them)

Format mismatches. The export doesn't match what payroll expects. Hours in decimal (7.5) but payroll wants hours:minutes (7:30). Dates in UK format but payroll is set to US.

Fix: Configure the export template in your timesheet system to match payroll exactly. Test with a small batch first.

Missing or duplicate workers. A worker appears in timesheets but not in payroll, or appears twice.

Fix: Reconcile the worker list between systems at the start of each pay period. New starters must be added to both systems before their first shift. When managing zero-hours contract workers with timesheet software, this reconciliation is especially important — they're easy to lose in the gaps between systems.

Unapproved timesheets at export time. Some timesheets haven't been approved by the deadline. The worker still needs to be paid.

Fix: Options include estimating hours based on their schedule and adjusting next period, or processing a partial payroll. Neither is ideal. The real fix is enforcing the approval deadline with reminders and escalation.

Rate discrepancies. The pay rate in the timesheet system doesn't match the rate in payroll. This happens when rate changes are applied to one system but not the other.

Fix: Maintain a single source of truth for pay rates. When rates change, update both systems on the same day. This is a broader timesheet management discipline, not just an export problem.

When manual export becomes untenable

For a business with five workers, exporting and importing a CSV once a month is fine. For a business with 40 workers, or multiple pay groups, or weekly payroll, the process starts to feel like a weekly chore.

Direct integration is the answer — but only if your timesheet and payroll systems offer it. If they don't, ask them why. The market standard is that payroll-adjacent systems should integrate with major payroll platforms. If yours don't, that's a sign they might not be the right long-term choice.

Short of integration, you can use middleware tools or write a simple script to pull data from your timesheet system, transform it to payroll format, and upload it automatically. This bridges the gap without waiting for native integration (or before you move to a platform that offers it natively).

Platforms like Relentify's timesheet solution are built with payroll-first data export in mind — clean, consistent exports designed to pass straight into whatever payroll system you're using. No format wrangling. No reconciliation firefighting.

Frequently Asked Questions

Can I export timesheets directly to HMRC?

Not directly. HMRC receives payroll data via your payroll software or bureau. That payroll software imports the timesheet export. So: timesheets → export → payroll system → HMRC. Your payroll system handles the HMRC part under Real Time Information (RTI) rules.

What if my payroll system doesn't accept CSV imports?

Some older payroll systems only accept manual entry or proprietary file formats. If that's your situation, check if the vendor offers a data import API or if they can advise on third-party middleware. If neither exists, that's a strong signal that the payroll system is past its expiry date.

Do I need to export every worker, or only those who worked that period?

Most payroll systems expect a complete worker list each period, even for workers who took unpaid leave or were absent. Some systems allow you to flag workers as "no pay this period" rather than omit them. Check your payroll system's import specification.

How do I handle workers with multiple pay rates or cost centres?

This varies by payroll system. Some can accept multiple rows per worker (one per cost centre or rate). Others require you to pre-aggregate. Check the import specification or ask your accountant. If your current timesheet system can't export in the required format, that's a reason to change it.

Should I automate the export, or keep it manual?

Automate it. Even a simple scheduled export (e.g., every Tuesday morning) eliminates the "did I remember to export?" cognitive load and reduces human error. If your timesheet system supports scheduled exports or API pushes, use them.

What if the export is wrong after I've already processed payroll?

The sooner you catch it, the easier the fix. If you reconcile immediately after payroll (step 4, above), you can usually correct the next pay run without a supplementary payroll. If you catch it weeks later, you'll need to process an amendment. Keep those reconciliation checks frequent and fast.

Can I use the same export format for multiple payroll systems (if I have different staff on different systems)?

You can, but it's not recommended. Each payroll system has a "native" format that matches its field structure exactly. Using a standardized format across multiple systems can cause field mismatches or rate miscalculations. Better to have one export template per payroll system and use the right one each time.

The payoff

Get the export process right and it disappears. Data flows, people get paid correctly, and nobody thinks about it. Get it wrong and payroll becomes a weekly firefighting exercise.

The investment is upfront — one hour to specify the format, one hour to set up the export template, and then discipline to validate every export. After that, the system runs itself. That's the best kind of operational process: one you can set up once and then forget about.