Income Tax · TDS Defaults

TDS Default Consequences: Interest, Disallowance and Vendor Credit Issues

Finin2min Tax Desk·June 2026·7 min read40(a)(ia)

TDS default is not one problem. It can create interest, disallowance of expense, TDS return correction work, vendor credit disputes and demand exposure. Finance teams should treat TDS as a monthly close control.

Default types

DefaultImmediate riskSecondary risk
Tax not deductedInterest and disallowance exposure.Vendor may not get credit.
Tax deducted but not depositedInterest and serious compliance escalation.Expense disallowance and vendor dispute.
Wrong PAN/section/amountTax credit mismatch.Correction statement and follow-up.
Late TDS statementLate fee/filing issue.Delayed credit to vendor.

Official consequence reference

Official Income Tax Department guidance states that failure to deduct or deposit TDS can trigger interest, and Section 40(a)(ia) can result in 30% disallowance where applicable for resident payments subject to TDS and not deducted/deposited as required.

Monthly TDS control

Finin2min warning

TDS errors compound. A small missed deduction can become interest, disallowance and vendor-credit friction.
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Official sources used

This article is intentionally source-limited to official Income Tax Department / e-Filing material. Verify final positions with the latest Act, Rules, notifications, circulars and portal utilities before publishing.

FAQs

What happens if TDS is not deducted?

Official guidance refers to interest consequences and possible disallowance under Section 40(a)(ia) where applicable.

What if TDS was deducted but not deposited?

That can create interest and credit problems for the deductee.

Can TDS return mistakes be corrected?

Yes, through the official TDS/TCS correction statement process.