✓ PayrollCheck Custom checks for your team →

Catch payroll errors before you run payroll.

Drop in your monthly payroll CSV and see missing values, duplicate employee IDs, negative numbers and runaway overtime in seconds — before a wrong number reaches someone's paycheck.

Built for bookkeepers, controllers and payroll admins who eyeball the same export every month and can't afford to miss a thing.

or drag a .csv file anywhere onto this box

No signup. No upload. Runs entirely in your browser — your file never leaves your computer.

What it catches

The errors that quietly slip through a manual scan of a few hundred rows — the ones you only find out about after payroll runs.

Missing values
Blank employee IDs, store names or other required fields that would break the payroll run or leave someone unpaid.
Duplicate IDs
The same employee ID on two rows — the kind of double entry that leads to someone being paid twice.
Negative numbers
Negative hours, rates or overtime where a positive value is the only thing that makes sense.
Runaway overtime
Overtime above a threshold you set — a flag for typos and for hours that need a second look before they cost real money.
Broken numbers
Text where a number should be ("N/A", a stray letter) that a formula would silently choke on.
Formatting problems
Rows knocked out of shape by a bad export — an unquoted comma, a missing field — so the columns no longer line up.

How it works

01

Drop your CSV

Export the monthly file from your payroll or time system and drop it in. It reads comma and semicolon files, the way Excel exports them.

02

See what needs attention

A clear count of how many rows are clean and how many aren't, with a plain-English reason on every flagged row.

03

Download the flagged rows

Get a CSV of just the problem rows, plus an "Issue reason" column, to send back to whoever owns the data — then re-check until it's clean.

Payroll data is nobody's business but yours.

Most online tools ask you to upload salaries, names and hours to their server. This one doesn't. Every check runs on your own machine, in your browser — the file is never sent anywhere, so there's nothing to leak, nothing to trust, and nothing stopping you from using it offline.

Made for people who process payroll for several clients or locations and run the same nerve-wracking check every single month.

Make it yours

The free tool above catches the common errors on a standard file. These take it the rest of the way — your columns, your rules, your team. Fixed price per project, nothing to subscribe to.

Start here

Configured for you

from $180 · about 3 days

  • Mapped to your exact columns and headers, in any language
  • Your rules: overtime limits, required fields, what counts as an error
  • Extra checks specific to your business
  • Your own version, ready to use

Your team's private version

from $450 + $40/mo

  • Everything in Configured for you
  • Hosted at a private link or your own domain
  • Optional password for your finance team
  • Your name and branding

Connected to your system

from $800

  • Everything above
  • Pulls data straight from your payroll or time system
  • No more manual exports each month
  • Scoped to your setup

Send me your file — or just your column names — and I'll tell you exactly what it needs and what it will cost, no obligation. Email me →