Common Differences Between Books and GST Returns and How to Explain Them

Turnover in the audited financial statements rarely matches GST returns exactly. That's normal — as long as every difference is understood and documented. This guide lists the common reasons and how to explain them.

Timing Differences

• Invoices recorded in the books in one year but reported in GST in the next, around year end.
• Credit notes issued after year end relating to the year.
• Advances received, taxed in GST but not yet recognised as revenue in the books.

Income That Isn't a GST Supply

• Interest income, dividends, and other non-operating income that isn't a taxable supply or is exempt.
• Profit on sale of investments.
• Foreign exchange gains.

Supplies Not in the Books' Revenue

• Supplies between your own GSTINs in different states — taxable under GST, but eliminated in the company's accounts.
• Sale of fixed assets, which is a supply under GST but isn't revenue in the books.
• Supplies to employees or related parties without consideration, which can be deemed supplies.

Accounting Adjustments

• Revenue recognised over time under accounting standards, while GST follows invoice or time-of-supply rules.
• Discounts shown differently in the books and invoices.
• Unbilled revenue.

Errors

Some differences are genuine errors: invoices not reported, wrong rates, credit notes missing. These need correcting — through later returns, the annual return, or payment through DRC-03.

How to Document Differences

1. Prepare a reconciliation from book turnover to GST turnover, line by line.
2. Explain each reconciling item with supporting evidence.
3. Separate timing differences from permanent ones.
4. Settle any genuine short payments before filing.
5. Keep the workings for audits and notices.

Getting Help

Think Filing prepares book-to-GST reconciliations and documents every difference for the annual return.