Late Payment Fee Calculator

Calculate a late-payment fee from the overdue amount and entered terms. Enter your own values below to see late payment charge and check the method behind it.

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Your inputs

Change the example values to match your situation.

Your result

Let’s work it out.

Fill in your inputs and select Calculate.
Your result and breakdown will appear here.

How this calculator works

Simple late interest = unpaid amount × annual rate × days / 365; add the agreed fixed fee.

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What is Late Payment Fee Calculator?

Late Payment Fee Calculator helps you calculate a late-payment fee from the overdue amount and entered terms.

The main result is late payment charge, with a breakdown of total payable. The formula, example and assumptions below explain how to interpret it.

How to use Late Payment Fee Calculator

Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.

  1. Gather overdue invoice amount (₹), annual late interest rate (%), days overdue and fixed late fee (₹). Use values from the same situation or reporting period.
  2. Replace the example overdue invoice amount with your own value, then complete the other fields. Check the displayed units.
  3. Select Calculate and read late payment charge with its result breakdown. Change one input and calculate again to compare a second scenario. Reset restores the original example.
  • Enter overdue invoice amount in ₹, at least 0. Decimals are accepted.
  • Enter annual late interest rate in %, at least 0 and at most 100. Decimals are accepted.
  • Enter days overdue, at least 0 and at most 36500. Use a whole number.
  • Enter fixed late fee in ₹, at least 0. Decimals are accepted.

Late Payment Fee Calculator: a worked example

With the inputs below, the result is ₹147.95 (late payment charge). Follow the example, then replace these illustrative values with your own.

Example inputs and output
Input or outputExample value
Overdue invoice amount (₹)₹10,000
Annual late interest rate (%)18 %
Days overdue30
Fixed late fee (₹)₹0
Late payment charge₹147.95
Total payable₹10,147.95

Understanding the Late Payment Fee result

Read late payment charge alongside total payable. These describe different parts of the same calculation.

Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.

  • Example Total payable: ₹10,147.95

Late Payment Fee Calculator: assumptions and common mistakes

A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.

  • Separate revenue from cash receipts and cost from selling price. Check the denominator before comparing a margin with a markup.

For wider guidance, visit ICAI. The formula and scope of this specific tool are stated on this page.

Late Payment Fee Calculator FAQs

What does Late Payment Fee Calculator calculate?

Late Payment Fee Calculator helps you calculate a late-payment fee from the overdue amount and entered terms. Its main output is late payment charge in ₹.

What inputs do I need for Late Payment Fee Calculator?

You need overdue invoice amount (₹), annual late interest rate (%), days overdue and fixed late fee (₹). Use the field labels and units to match your figures to the formula.

Which formula does Late Payment Fee Calculator use?

Simple late interest = unpaid amount × annual rate × days / 365; add the agreed fixed fee.

What is a worked example for Late Payment Fee Calculator?

Example inputs: Overdue invoice amount: ₹10,000; Annual late interest rate: 18 %; Days overdue: 30; Fixed late fee: ₹0. The result is ₹147.95 (late payment charge).

How should I enter overdue invoice amount?

Enter overdue invoice amount in ₹, at least 0. Decimals are accepted.

How do I choose annual late interest rate?

Enter annual late interest rate in %, at least 0 and at most 100. Decimals are accepted. The example uses 18 %; replace it if your circumstances differ.

How should I read late payment charge?

Read late payment charge alongside total payable. These describe different parts of the same calculation.

Why might my Late Payment Fee Calculator result differ from my records?

Separate revenue from cash receipts and cost from selling price. Check the denominator before comparing a margin with a markup. Differences in entered values, units or rounding can also change the comparison.

Can I compare two scenarios in Late Payment Fee Calculator?

Yes. Note your first late payment charge, change overdue invoice amount or another input, and select Calculate again. Editing a field clears the old result so it is not mistaken for a new calculation.

Is Late Payment Fee Calculator free, and where are my inputs calculated?

This calculator is free to use without signing in. Its formula runs in your browser; calculator inputs are not sent to a calculation API. The inputs reset to the example values when you reset the form or start a fresh page.