When I talk to people about the economics of illness, the picture is almost always blurry. Most know you get roughly 80 percent, but not that the amount steps down, changes sender twice and hits a ceiling surprisingly early. It hurts the wallet exactly when you least have the energy for surprises, so it is worth knowing the timeline in advance.
For the first 14 days your employer pays sick pay at 80 percent, minus a karensavdrag on the first day. From day 15 Försäkringskassan takes over with sjukpenning, also around 80 percent but calculated on your qualifying income (SGI) and with a ceiling at 10 price base amounts. If you have a collective agreement it often tops that up by around ten percent, and covers salary above the ceiling. The single most important thing you can do in advance is protect your SGI.
I walk through every step: the karensavdrag, the sick pay, the sjukpenning, what a collective agreement adds, how to protect your SGI, and what happens if the illness becomes long-term. To see what it comes to after tax, run your salary in the salary calculator.
Day 1: the karensavdrag
The first day of illness you meet the karensavdrag, the deductible in the system. It is no longer an unpaid day but a fixed deduction of 20 percent of an average week's sick pay. For someone working evenly it lands at roughly one day's pay. The point of calculating it on a week is that the deductible is the same size no matter which day or shift you fall ill on.
Day 2 to 14: sick pay from the employer
For the first 14 days it is your employer who pays, as sick pay (sjuklön) of 80 percent of the pay you lose. This period is usually the simplest: you still have a job, you get 80 percent minus the karensavdrag, and you need do nothing more than report sick. After a week a doctor's certificate is required if you remain ill.
Day 15 onward: sjukpenning
From day 15 Försäkringskassan takes over with sjukpenning. Now the basis changes: the benefit is calculated on your qualifying income (SGI), not your actual monthly salary, and the calculation uses a factor of 0.97 before the 80 percent is applied. That makes sjukpenning a little lower than a clean 80 percent.
And here is the ceiling that surprises many: sjukpenning is only calculated on income up to 10 price base amounts, which in 2026 gives at most about 1,260 kr a day. If you earn more than that, you get nothing from the state on the part above. After 364 days the level also drops from 80 to 75 percent on the continuation level.
What a collective agreement adds
If you have a collective agreement the picture looks brighter. The agreement normally gives a complementary sick pay of around ten percent on top of the sjukpenning for a period, so you land closer to 90 percent. More importantly: the agreement often covers income above the sjukpenning ceiling, the part where the state stops paying. It is precisely high earners without a collective agreement who fall hardest, because they lose everything above the ceiling.
One thing to clear up, because it is often confused: income insurance through the union covers unemployment, not illness. Protection during illness comes instead from the collective agreement or from private sickness insurance. If you have neither, only the sjukpenning applies, ceiling and all.
Protect your SGI
The whole system rests on your SGI, and it can actually disappear. To keep it you must have income or a protected activity: working, being registered as a jobseeker, drawing parental benefit or being on sick leave. A gap where you neither work nor are registered can lower your SGI, sometimes to zero. It is the most common and costly trap I see: someone leaves a job, takes a break without registering with the employment service, and only discovers at illness that the protection has shrunk.
When it becomes long-term
If you become ill for a very long time, and your work capacity is judged permanently reduced, the sjukpenning can eventually turn into sickness compensation (sjukersättning), what used to be called early retirement. It is a whole other world with its own rules and lower levels, and something most people never come near. For the purpose of this guide it is enough to know that there is a final safety net beneath sjukpenning, but that it is not something to plan your finances around.
My recommendation
Two things make the biggest difference, and you do both while you are healthy. The first is to know whether you have a collective agreement, and if not, to consider sickness insurance, especially if you earn above the ceiling. The second is never to lose your SGI through an unprotected gap between jobs or activities. Do those two things and a spell of illness becomes a health question rather than a financial crisis.