The agreementis negotiated.Now it can be checked.

PayTjek checks every line of the payslip against the Danish collective agreement and the law, and shows the clause, the quote and the amount in kroner. Before pay goes out, or retrospectively in a member case.

Find the errors Book a demo

//Find the errors

There are three errorson this payslip.Can you find them?

Synthetic payslip: an apprentice on step 2 in Industry, March 2026. Over 18 and under 25, more than 2 months' seniority.

OKDeviationNoteAwaiting documentNot checkedNot covered

//Solutions

Chooseyour path

One rules engine. The same rules and the same answer – whoever is asking.

Trade unions

The whole member case. Every payslip. One combined claim.

Payroll bureaus

Find the error in the setup before it hits the whole payroll run.

//See the platform

25 payslips,one contract,two agreement editions.

See the whole case in 73 seconds, from new case to the letter to the employer, recorded in the Consultant Tool. The check itself takes about 75 seconds: about 3 seconds per payslip. With Danish subtitles.

//Errors we find

Small errors.Every month.

How to find pay errors Check your payslip
01 · Industry, apprentice

The rate adjustment that never came.

The apprentice rate went up on 1 March. The payslip didn't follow.

PaidDKK 94.00/h
ExpectedDKK 97.30/h
02 · Retail

The evening supplement that stood still.

DKK 31.05 should have been DKK 32.15 from 1 March 2026.

PaidDKK 31.05
ExpectedDKK 32.15
03 · Nurses

The evening supplement at the old rate.

The supplement was calculated at the old percentage. It should have been 32% (§ 12(3) of the working hours agreement).

PaidDKK 53.50/h
ExpectedDKK 63.41/h
04 · Commerce

Company pension at 10% after 1 May 2025.

The rate went up to 11% on 1 May 2025. The payslip didn't follow (collective agreement § 5(1)(B)).

PaidDKK 2,391.58
ExpectedDKK 2,630.73
05 · Industry

9% that should have been 10.

Free choice account after 1 March 2026.

Paid9%
Expected10%
06 · Social and healthcare workers (SOSU)

Evening supplement from 6 pm instead of 5 pm.

Five evening hours fell outside the supplement because it started an hour too late (agreement 79.01, § 13(2)).

Paid17 h
Expected22 h
07 · IT

Free choice account at 5.5% after 1 May 2024.

The rate went up to 6.5% on 1 May 2024. The payslip didn't follow (collective agreement § 8(1)).

Paid5.5%
Expected6.5%
08 · Industry, apprentice

The month that was 110 hours short.

60 hours paid in a month with standard hours of 170. If the apprentice was at school, just over DKK 10,000 is missing.

Paid60 h
Standard170 h

None of them is spectacular. That's why they're allowed to stay.

//What an answer looks like

No black boxes.Every krone hasa clause.

Evening supplementRetail · payslip March 2026
Deviation
Paid
DKK 31.05/h × 20 h = DKK 621.00
Expected
DKK 32.15/h × 20 h = DKK 643.00
Assessment
Deviation
Quote
For arbejde inden for normal effektiv ugentlig arbejdstid på 37 timer betales følgende tillæg pr. time: (In English: for work within the normal effective weekly working hours of 37 hours, the following supplement is paid per hour.) Table cell: weekdays 18.00-23.00, 1 March 2026, DKK 32.15.
Source
Butiksoverenskomsten 2025–2028 (the Retail Agreement), § 1, item 5, Forskudttidstillæg (unsocial hours supplement), p. 11 · applies from 1 March 2026
Amount
DKK 22.00 too little

Same payslip, same answer. Today and a year from now.

AI reads the collective agreement. Maths calculates the pay. Every krone has a clause.

OK

The line matches, to the last øre.

Green
Deviation

An error, with the amount in kroner and the clause.

Red
Note

Something a specialist should look at.

Yellow
Awaiting document

We're missing one document, and we say which.

Blue
Not checked

The rule isn't in our rule set yet, and we say so.

Grey
Not covered

The line isn't covered by the collective agreement.

Grey

No line is hidden. Every line is either checked, or it says what we're missing.

//The whole case

The whole case,not just one payslip.

Upload two years of payslips at once. PayTjek follows the case month by month: step changes, rate adjustments, new agreement periods and year-to-date balances. Out comes one combined claim.

25 payslipsAugust 2024 – August 2026 · synthetic case
One combined claimDKK 2,910.97
deviation with an amountpayslip missingno deviation calculated
October 2024Below the minimum rate
DKK 77.05 vs DKK 79.75/hDeviationDKK 459.54
May 2025Below the minimum rate
DKK 79.75 vs DKK 82.95/hDeviationDKK 497.28
September 2025–May 2026Rate below the training step
year 2 of training · 3 periodsDeviationDKK 1,762.68
March–April 2026Free choice account 9 → 10%
2 periodsDeviationDKK 191.47

Only one error in four can be seen on the payslip alone. More than half require the collective agreement, the law or the contract, and almost one in five requires the previous payslip.

//Why not just use ChatGPT?

Put the caseinto ChatGPT or Claude.

Click the documents in, one at a time. See what the model has to keep track of, what it costs, and how long you wait before it can answer a single question.

The case documents

ChatGPT or Claude

0 tokens1M = Claude's limit

  • ChatGPT holds at most 256,000 tokens in context on Plus and 400,000 on Pro. Larger files are read via search.
  • Claude holds at most 1 million tokens and 20 files per conversation.
  • Anthropic itself writes that accuracy drops as length grows. See the source
Rules in play
0
Combinations to keep track of
0
payslips × rules
Tokens per question
0
Price per question
$0
Via the API: GPT-6 Astra / Claude Fable 5.1 · list price without caching
Response time per question
0
ChatGPT / Claude · measured 16 October 2026 with the same files: 25 payslips, the contract and two agreement editions

Sources, checked 16 October 2026: ChatGPT plans · ChatGPT and files · Claude's context · Claude's file limits · OpenAI pricing · Anthropic pricing · NoLiMa · Lost in the Middle. Tokens are measured with OpenAI's tokenizer.

PayTjek reads the collective agreement once and stores every rule with its source. Each payslip is checked only against the rules that applied on that date, and personal data is removed before the payslip is read. A case with 25 payslips is checked in about 75 seconds, and that is the whole case, not one answer. The same case gives the same answer, every time, with the clause.

//Coverage

Six areas.Plus Danish law.

See the collective agreements (in Danish)
Industry incl. apprenticesRetailCommerceITNursesSocial and healthcare workers (SOSU) + ATPLabour market contributionIncome taxHoliday

Is your collective agreement missing? We'll build it for your pilot.

//Trust

Every assessmentcan be verified.

Innovation Fund Denmark (Innovationsfonden)Supported by Innovation Fund Denmark
All data in the EUWith European and Danish cloud providers
Personal data is removed before the payslip is read

//Why we're building it

"The collective agreement takes months to negotiate. But no one can prove it is being followed. We're changing that."

Theis VeddingeCEO & Co-founder · PayTjek

//Book a demo

Send usa case.

Book a demo

Send us the collective agreement, the local agreements and a case in advance. Book 30 minutes. We'll run your own payslip through while you watch.