State fee for filing a simple monetary claim — based on claim value (State Fees Act Annex 1, effective 01.01.2022)
TsMS §124: for a money claim, claim value = sum claimed. TsMS §133: main and ancillary claims are added; for default interest, add one year's interest to the accrued amount (current interest). This gives the claim value used to calculate the state fee.
Source: State Fees Act, Annex 1 (effective 01.01.2022). Civil case value up to (inclusive) → full state fee. For over 500,000 € the fee is 5,000 €.