Tax Procedure Cost Calculator
Estimate the costs of administrative complaints, judicial challenges, tax arbitration and payment plans. Updated values with official fees from AT, CAAD and courts.
Cost Calculator
Tax Procedures
Estimate the costs of tax procedures in Portugal: complaints, judicial challenges, arbitration and regularizations.
Result
Estimated Total Cost
FREE
Notes
- •Free administrative procedure with the Tax Authority
- •Prazo de apresentação: 120 dias
- •Pode ser feita online no Portal das Finanças
Values shown are estimates. Always consult a lawyer for analysis of your specific case.
Interest Simulator
Late Payment & Compensatory Interest
Calculate interest on tax debts in Portugal using official Tax Authority rates.
Principal amount of the tax debt
Due date of the debt or deadline term
Date up to which to calculate interest
Result
Total with Interest
€ 10 412,04
Important Notes
- •Late payment interest on State debts is calculated daily from the end of the voluntary payment period.
- •Compensatory interest has a maximum term of 180 days (declaration error) or 90 days (after inspection).
- •Voluntary regularization can significantly reduce interest owed.
Values shown are estimates based on official rates. Always consult a lawyer or the Tax Authority for definitive values.
Need guidance?
Contact us for analysis of your tax situation and interest reduction strategies.
Request ConsultationWhen to Use Each Procedure?
Administrative Complaint
First step, free. Ideal for obvious errors or simple issues. 120-day deadline after notification.
When: Calculation errors, duplicate payments, simple documentary issues.
Tax Arbitration (CAAD)
Faster resolution than judicial route (6-12 months). Predictable costs. Binding decision.
When: Legal interpretation issues, significant values, need for speed.
Judicial Challenge
Traditional route in administrative and tax courts. Longer process (12-24 months).
When: After complaint rejection, complex issues, important precedents.
Installment Payment
Payment plan up to 36 months. Suspends tax enforcement. Requires guarantee above €5,000.
When: Liquidity difficulties, need time to organize payment.
Important Notes
- Administrative complaints are always free and can be filed online at the Tax Portal.
- Tax arbitration (CAAD) is generally faster and with more predictable costs than the judicial route.
- Deadlines are strict: 120 days for administrative complaint, 90 days for challenge after rejection.
- Filing a complaint or challenge does not automatically suspend tax enforcement.
- To suspend enforcement, a guarantee must be provided or a justified waiver obtained.
How to Respond to a Tax Authority Notification
Practical guide on the steps to follow when you receive a tax notification: deadlines, response options and defense strategies.