Free TDS and GST Interest Calculator.
Quickly calculate interest on late payments for TDS/TCS under Section 201(1A) and GST under Section 50 of the CGST Act. Switch between quick calculations and bulk multi-row tables to compile comprehensive reports.
Secure and client-side processing.
Your calculations run entirely in your web browser. Absolutely no tax amounts, sections, deduction/deposit dates, or other business metrics are sent to Lejur One servers.
Open the TDS & GST Interest Calculator below.
Enter your tax amounts and dates to compute interest. Switch modes to add multiple items to a bulk list.
When to use it
Use this when auditing statutory tax dues, preparing working papers for tax audit reports (Form 3CD), or checking portal-computed interest demands for TDS/TCS or GSTR-3B filings.
When not to use it
Do not use this tool as a final tax return filing validator. Statutory interest calculations can vary based on specific circumstances, litigations, or portal updates. Always consult a tax advisor before filing.
Common questions about tax interest calculations.
How does the TDS interest calculation work?
Under Section 201(1A) of the Income Tax Act, interest is calculated at 1.0% per month for delay in deduction (from date of deductibility to actual deduction), and 1.5% per month for delay in deposit (from date of deduction to actual deposit date). Any part of a calendar month is rounded up and counted as a full month.
How is GST interest calculated?
Under Section 50 of the CGST Act, interest is calculated on a pro-rated daily basis at 18% per annum for late payment of tax, and 24% per annum for wrongly availed and utilized Input Tax Credit (ITC). The delay is counted from the day after the due date to the actual date of payment.
What is the difference between Quick and Bulk modes?
Quick mode lets you compute interest for a single set of tax components and dates. Bulk mode allows you to add multiple independent rows (combining GST and TDS scenarios) to compute a consolidated aggregate interest statement.
Is my financial data uploaded to Lejur One servers?
No. This Interest Calculator operates completely client-side in your browser. No financial amounts, sections, or dates are ever sent to our servers, ensuring absolute privacy.
Automate your statutory tax tracking and compliance.
Lejur Books integrates real-time voucher entries, automatically flags outstanding TDS/TCS dues, posts RCM liabilities, and coordinates audit logs in one secure cloud workspace.