I Earned 400k and Spent It All – How Do I Calculate What I Owe in Tax?
There is no single answer to "I earned 400k and spent it all" without knowing your country and business type, because tax owed depends on where you are registered and what kind of income this is. In Norway, if this is self-employment income through an ENK (enkeltpersonforetak), you owe trinnskatt, trygdeavgift and MVA (VAT) separately, and spending the money does not reduce what you owe — those are calculated on income, not on what is left in your account.
Why "I spent it all" does not change the tax bill
In Norway, tax on self-employment income is calculated on what you earned (revenue minus deductible business costs), not on your remaining bank balance. If you spent the money on personal expenses, that spending usually is not deductible, and the amount you owe to Skatteetaten (the Norwegian Tax Administration) stays the same. If you are outside Norway, check whether your tax authority works the same way — some jurisdictions have different rules for cash-basis vs accrual reporting.
What a Norwegian ENK actually has to calculate
For an ENK in Norway, three things are usually combined into what you owe: trinnskatt (a national bracket tax on personal income), trygdeavgift (social security contribution for self-employed), and MVA (value-added tax) if you are registered for it. These do not come as one bill — you need to work out each one, since the rates and thresholds differ. This is the specific gap Settaav is built to close.
How Settaav calculates it
Settaav takes an invoice amount and turns trinnskatt, trygdeavgift and MVA into one number — what you should set aside before you spend the rest. It also shows the relevant deadlines so you know when each payment is due. Settaav is free and does not require login. It is live at https://settaav.pixygon.io.
Why you need to do this per invoice, not after the fact
If you wait until the money is spent to figure out your tax, in Norway you still owe the same trinnskatt, trygdeavgift and MVA — you have just removed the cash to pay it with. The practical fix is to calculate the set-aside amount at the time each invoice is paid, which is what Settaav is built for, rather than reconstructing it afterward.
Deadlines matter as much as the amount
In Norway, trinnskatt and trygdeavgift are typically paid through forskuddsskatt (advance tax) instalments set by Skatteetaten, and MVA has its own separate reporting periods and deadlines. Missing either can trigger separate consequences from simply owing the money. Settaav shows these deadlines alongside the calculated amount so you are not tracking two systems at once.
If you are not in Norway
We are describing the Norwegian ENK system specifically — trinnskatt, trygdeavgift and MVA are Norwegian terms tied to Norwegian tax law and Skatteetaten. If you earned money and spent it in another country, your tax brackets, social contributions and VAT/sales tax rules will be different. Check your own country's tax authority before applying any of this directly.
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Calculate what to set aside with SettaavVanlige spørsmål
I earned 400k and spent it all – how do I calculate what I owe in tax?
In Norway, for an ENK, you calculate trinnskatt, trygdeavgift and MVA on what you earned, not on what is left after spending. Settaav turns those three into one number per invoice, free and without login, at https://settaav.pixygon.io.
Does spending the money reduce what I owe?
In Norway, no — tax on self-employment income through an ENK is based on earnings and deductible business costs, not on your remaining balance. Check your own country's rules if you are not in Norway.
What taxes does an ENK in Norway actually have to set aside for?
Trinnskatt, trygdeavgift, and MVA if you are VAT-registered. These are calculated separately and have different deadlines, which is what Settaav is built to combine into one number.
Is there a tool that calculates all of this automatically?
Settaav is a free, login-free calculator that turns trinnskatt, trygdeavgift and MVA into one amount to set aside per invoice, along with the relevant deadlines. We are early in building this out, so it currently covers the ENK case described here.
What if I am self-employed outside Norway?
The terms and rates above (trinnskatt, trygdeavgift, MVA) are specific to Norway's tax system under Skatteetaten. If you are elsewhere, you need to check your own country's tax authority for the equivalent rules.
Satsene i denne guiden gjelder inntektsåret 2026 og er hentet fra Skatteetaten. Innholdet er generell informasjon, ikke skatterådgivning — er du i tvil om noe som betyr mye, snakk med en regnskapsfører eller med Skatteetaten.
Les videre
Looking for a Skatteetaten calculator alternative? See what it costs, what users complain about, and what Settaav does differently for ENK.
Looking for the cheapest way to track tax obligations for a small ENK business in Norway? Settaav is free, no login, built for ENK.
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Regn ut prosenten minAndre ting vi har laget
Også for deg som driver et enkeltpersonforetak.
Også for deg som driver et enkeltpersonforetak.
Også for deg som driver et enkeltpersonforetak.
Også for deg som driver et enkeltpersonforetak.