What the Dutch tax authority expects at a minimum
The law is surprisingly level-headed: as a business owner you must keep records from which your rights and obligations can be established. In plain language: your paperwork has to show what you earned, what you spent, and how much VAT you received and paid. For most freelancers (zzp'ers) that comes down to four piles:
- Sales invoices — everything you send to customers, numbered consecutively.
- Purchase invoices and receipts — every business expense, from a laptop to a train ticket.
- Bank statements — the money trail that ties all of the above together.
- Hours worked — the hours you spend on your business.
That last one is forgotten most often, and it is worth its weight in gold. Many deductions for business owners — such as the self-employed deduction (zelfstandigenaftrek) — depend on the hours criterion (urencriterium): a minimum number of hours you have to spend on your business each year. Exactly where that threshold sits and which hours count towards it is on belastingdienst.nl — but what you have to do is simple: record the hours you make, including acquisition, admin and travel time. A weekly list is enough, as long as it can be verified.
Depending on your line of work, other things belong there too — quotes, contracts, your business diary — but the principle stays the same: anything needed to recalculate your figures belongs in your records.
Good records are not a pile for the tax authority — they are your own memory, with receipts attached.
How long do you have to keep it all?
For the basic data in your records there is a retention obligation of seven years (bewaarplicht). For data about immovable property — a business premises, for instance — it is ten years, because of the longer VAT adjustment period.
| What | How long |
|---|---|
| Invoices, receipts, bank statements, hours worked | 7 years |
| Data about immovable property (such as a business premises) | 10 years |
Keeping everything digitally is allowed. If you receive invoices digitally, keep them digitally as well — in their original format. A clearly legible scan or photo of a paper receipt is generally fine, as long as all the details are on it and you can still find it years later. Paper receipts fade; a photo on day one is therefore not just easier, but safer too.
Business and private: separated from day one
The biggest time-waster in a freelancer's records is not the bookkeeping itself, but the detective work afterwards: that card payment at the DIY store three months ago — was it business or private? Every mixed account turns your records into a puzzle.
The simplest solution: open a separate current account for your business and run everything business-related through it. Invoices are paid into it, business costs are paid from it, and whatever you need privately you move to yourself in one recognisable transfer. That way your bank statement becomes the backbone of your records by itself: one file in which almost every business event can be found. What exactly happens when such a bank line is posted is shown in The journal entry, explained.
one account that is only about the business — that is half your bookkeeping
A rhythm you can sustain
Records rarely fail through unwillingness and almost always through pile-up. The trick is not more discipline, but a smaller rhythm — so small that skipping it makes no sense any more:
- Receipt? Record it straight away. Photograph it or forward it there and then — ten seconds now saves a search in March.
- Five minutes a week. Update your bank statement, confirm the week's entries, top up your hours. Done.
- VAT each quarter. If you keep up the weekly rhythm, the VAT return (btw-aangifte) is only a matter of checking — not reconstructing. How that return works is explained in VAT for starters.
And one habit your future self will hold against you if you skip it: with every invoice that gets paid, set the VAT portion aside immediately, on a savings account for example. That money feels like turnover, but it is not — you are only passing it on.
Common mistakes (and how to avoid them)
- The shoebox. Saving up receipts "for later" and then reconstructing a whole quarter in one filing weekend. By that time receipts have faded, payments have been forgotten and every item is twice the work. The weekly rhythm above was designed against exactly this.
- Skipping the VAT pot. Leave the VAT you received sitting in your current account and you will spend it without noticing — and face an unpleasant surprise at the quarterly return. Set it aside on receipt, done.
- Invoices without tidy numbering. Invoice numbers have to be consecutive and unique. Numbering by hand goes wrong sooner or later — duplicate numbers and gaps in the sequence invite precisely the questions you want to avoid.
- Everything at the last minute. Records that are only updated just before deadlines only exist at deadlines. A shame: up-to-date figures are exactly the instrument that lets you make better decisions along the way.
How to keep it simple
This guide is general information, not tax or legal advice. Rules and amounts change; check belastingdienst.nl for your situation or ask your adviser.