Question 1

How are delay days calculated?

Accepted Answer

Delay days are calculated as the difference between due date and payment date. If payment is made on or before due date, delay days are zero.

Question 2

How is daily rate found from monthly rate?

Accepted Answer

A practical method is monthly rate / 30. For example, 4.5% monthly rate corresponds to approximately 0.15% per day.

Question 3

What is the difference between late interest and late surcharge?

Accepted Answer

Both are additional amounts due to delayed payment. Which one applies depends on tax type and legal basis. The calculator lets you model either type with the selected rate.

Question 4

Can I use this result for official declaration?

Accepted Answer

No. This calculator is for estimation and planning. Official amount may differ based on authority calculations and legal updates.

Question 5

What inputs affect the total payable most?

Accepted Answer

Principal amount, delay days and monthly rate are the key variables. Longer delays and higher rates increase total payable significantly.

Question 6

What should I check before making payment?

Accepted Answer

Check current legal rates, the exact due date, any enforcement notices, and your official debt statement before final payment.

Tax Late Interest and Surcharge Calculator

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