Updated 30.7.2026
Guides
F-tax: when you need it and when you don't
What F-tax actually is
F-tax isn't a permit to work. It's a decision by the Swedish Tax Agency (Skatteverket) about who is responsible for paying the preliminary tax on an income. Someone approved for F-tax handles it themselves, through preliminary tax paid in on an ongoing basis throughout the year. Someone with A-tax instead has the tax deducted by the payer before the money lands in their account.
The difference is most noticeable for whoever is buying the work. If you invoice with F-tax, the customer can pay the full invoice amount without making a tax deduction or paying employer contributions. Without F-tax, that responsibility falls on the payer, which is why many companies decline to buy work directly from a private individual. That's exactly the problem that light entrepreneurship solves.
When you need F-tax
You apply for F-tax approval when you run a business, that is, operate your own enterprise. The Tax Agency examines three things: that the activity is independent, that it's carried out on an ongoing basis, and that it's run with the intention of making a profit. A single assignment, a hobby that occasionally generates income, or work you carry out entirely on a client's terms doesn't normally count as running a business.
If you have a sole proprietorship, a partnership, or a limited company and sell goods or services, F-tax is generally something you need. If you combine employment with running your own business, there's also FA-tax, which means you have A-tax on your salary and F-tax on the business activity. Applications are made through the Tax Agency, and the current requirements and e-services are available at skatteverket.se.
That's why you don't need F-tax as a light entrepreneur
As a light entrepreneur, you don't have your own business. The light entrepreneurship company is the seller to the customer and the employer to you: it invoices under its own name, with its own organization number, and then pays you a salary. Tax is deducted from the salary just like for any other employee, and the employer contributions are reported by the company. So there's no income within any business of your own that would require F-tax.
For the customer, this makes things simple. The customer buys from a company with an organization number, receives a normal invoice with VAT, and needs neither to make a tax deduction nor pay employer contributions. You get what's often the whole practical point of F-tax, the ability to invoice companies, without starting anything of your own.
Common misunderstandings about F-tax
The first misunderstanding is that F-tax is some kind of professional certification or quality stamp. It isn't: the approval only states who pays the preliminary tax. The second is that you must have F-tax to invoice at all. It's enough that the invoice comes from someone with an organization number, and in light entrepreneurship, that's the light entrepreneurship company.
A third misunderstanding is that F-tax automatically makes you a contractor instead of an employee. The authorities look at how the work is actually carried out, not just at what the paperwork says. F-tax approval can also be revoked, for example if tax returns and payments aren't kept up, which is one of the administrative risks you avoid as a light entrepreneur.
How to choose your path
The real question isn't whether you should have F-tax, but whether you want to run a company. If you want to build your own brand, make larger investments, deduct VAT on purchases, and plan your results over several years, that points toward having your own company and, with it, F-tax. If you mainly want to sell your time and skills, take on irregular assignments, and avoid administration, light entrepreneurship is usually simpler.
You can also start with one and move to the other. Many people test their idea as a light entrepreneur, see whether the assignments hold up over time, and only register a company once the volume justifies it. Since there's no company to deregister, waiting costs nothing.
Invoice without F-tax with Truster
With Truster, you invoice under Truster's name, get paid a salary with tax and contributions handled, and never need to apply for F-tax. The platform is built by a payment institution authorized by the Finnish Financial Supervisory Authority and is used by more than 55,000 people across the Nordics. Truster is opening in Sweden by invitation: join the waitlist if you want to get started.
Frequently asked questions
Do I need F-tax to invoice?
No. F-tax is needed when you run your own business. If you invoice through a light entrepreneurship company, that company is the seller and employer, and tax is deducted from your salary. In that case, you need neither F-tax nor your own organization number.
What's the difference between A-tax, F-tax, and FA-tax?
With A-tax, the payer deducts tax from your payment. With F-tax, you pay preliminary tax on the business's results yourself. FA-tax is the combination, for those who are both employed and run their own business. Approval for F-tax and FA-tax is applied for through the Tax Agency.
Can I get F-tax for a single assignment?
Probably not. The Tax Agency requires the activity to be independent, ongoing, and run with the intention of making a profit, and a single assignment normally doesn't meet that. Light entrepreneurship is built for exactly this situation: you can invoice a single assignment without registering anything.
Can my customer require me to have F-tax?
The customer may have a policy of only buying from companies, which is why this question comes up. With light entrepreneurship, that requirement is effectively met, since the invoice comes from a company with an organization number. Explain the setup to the customer, that's usually enough.
Truster is opening in Sweden
Invoice without your own company. Currently by invitation: join the waitlist.