Income tax in Finland
Income tax of a year 2017 is levied by following table. The first column gives the range of income, the second column tells the tax at the lower boundary and the third tax percentage for exceeding part.
In the taxation for 2017, the income tax payable to the state on earned income is determined on the basis of the Income Tax Act (1535/1992) according to the progressive income tax scale as follows:
| Taxable income, € | Tax at lower limit, € | Tax from the part exceeding the lower limit, % |
| 16900-25300 | 8,00 | 6,25 |
| 25300-41200 | 533,00 | 17.5 |
| 41200-73100 | 3315,50 | 21.5 |
| 73100- | 10174,00 | 31.5 |
Based of the table, we can solve the income tax for any income. For example, if the taxable income is 37000 euros, then the paid tax is
The authorities do not solve them separately but automatically. That's why , they form functions describing taxes in different ranges. The below examples are solved in the second range:
The only changing value is taxable income, so we can use a function
where x is taxable income.
| taxable income | Income tax | |
| 26 000 € | | |
| 29 000 € | | |
| 31 000 € | ||
| 37 000 e |
The previous function is valid only on [25300, 41200]. Authorities have these functions for all cases, which is called piecewise described function.
Tälle taulukolle funktio olisi
