Combining a job with freelancing: what it means for your income tax

Combining a permanent job with a freelance business on the side is a popular way to run a business with a safety net. From a tax perspective, though, that combination is less simple than 'salary plus a bit extra' — both incomes are added together, and the tax benefits often associated with self-employment aren't always within reach once you also have a job.

How your income is counted in Box 1

Employment income and profit from self-employment both fall under Box 1 and are added together before the progressive tax rate is applied. Your freelance profit sits on top of your salary, and that part often lands in a higher tax bracket than it would if you were only self-employed. Don't underestimate this: side income that looks modest on its own can, once added to your salary, still take a sizeable bite out of your profit in tax.

The 1,225-hour rule — and why a job often puts it out of reach

A number of tax benefits, including the zelfstandigenaftrek (self-employed deduction), require meeting the urencriterium: spending at least 1,225 hours a year on your business. If you also hold a regular job, an additional requirement applies — the so-called 'majority rule': more than half of your total working time must go to your business. For anyone combining a substantial job with a freelance practice on the side, that's often simply not achievable, because most of their hours are already going to the job. One important exception: if you were not an entrepreneur for income tax purposes in one of the five preceding years, the majority rule does not apply and the 1,225 hours are enough. Starters with a job on the side can therefore often still meet the hours criterion.

What this means for your tax benefit

If you don't meet the hours criterion, you lose the right to the zelfstandigenaftrek — and this is an all-or-nothing rule, there's no partial entitlement. The mkb-winstvrijstelling (SME profit exemption) is a different story: it applies to anyone with profit from a business, regardless of hours, so it still applies. It pays to know in advance which benefits you can and can't count on, rather than finding out when you file.

How to avoid surprises

The key is insight, and having it before the tax year is over. With bookkeeping that's kept continuously up to date, you know at any moment how the combination of salary and freelance profit plays out, and a profit forecast can show what tax is coming — instead of discovering it only when you file. That gives you time to adjust, for example by setting money aside or deliberately reconsidering how your hours are split between the job and the business.

Combining a job with your own business and want to know exactly where you stand tax-wise? Continuously up-to-date bookkeeping and a clear profit forecast take away a lot of uncertainty. Feel free to get in touch to have this calculated for your situation.