CP204 Mid-Year Revision Deadline 2026: What December Year-End Companies Must Know

25 Jun CP204 Mid-Year Revision Deadline 2026: What December Year-End Companies Must Know

If your company’s financial year ends 31 December, the statutory window to revise your YA 2026 CP204 tax estimate via Form CP204A closes on 30/06/2026. This deadline applies in Malaysia under Section 107C(7) of the Income Tax Act 1967, and it matters whether your actual profit is running above or below your original estimate.

What Changed

Nothing in the law has changed — but the deadline is fixed and unforgiving. Companies are allowed to revise their CP204 estimate in the 6th, 9th, and 11th month of the basis period (the 11th-month window applies from YA 2024 onward). For a company with a December year-end, the 6th month of the YA 2026 basis period is June 2026, so the first revision opportunity must reach LHDN by 30/06/2026. Miss it, and you still have the 9th-month window in September and a final 11th-month window in November before the YA closes.

Who Is Affected

This applies to all companies, LLPs, trust bodies and co-operatives with a 31 December financial year-end that are required to file CP204. It is most relevant if your actual YTD performance has moved materially away from the figure you estimated at the start of the year — in either direction.

What You Need to Do

• Compare your YTD actual profit against your original CP204 estimate.
• If profit has dropped, prepare a revised estimate backed by specific, documented reasons — not just a lower number.
• If profit has increased, revise upward. Under-revising here carries its own penalty exposure (see below).
• Confirm with your tax agent, in writing, that your original CP204 was in fact filed for this YA. This step is often skipped, and the cost of skipping it is higher than the cost of the revision itself.

The Cost of Getting This Wrong

Two separate risks apply, and they are often confused with each other.

First, if your actual tax payable for the year ends up exceeding your estimate (original or revised) by more than 30%, Section 107C(10) imposes a 10% penalty on the shortfall above that 30% threshold. This is the risk most companies focus on when revising downward without a documented basis.

Second, and separately — if CP204 was never filed for the year at all, LHDN issues its own estimate via Form CP205 under Section 107C(8), and that figure becomes the deemed estimate, regardless of what your actual numbers look like. Non-filing itself is also a prosecutable offence under Section 120(1)(f), with compounds ranging from RM200 to RM20,000. We have seen compounds at the higher end of this range issued for non-filing alone, before any underestimation penalty even comes into the picture.

Key Dates

Need Help?

If you are not certain your CP204 was filed for this YA, or you want your revised estimate reviewed before submission, contact KS Chia & Associates Chartered Accountants (AF001828) — WhatsApp or call 011-2366 5233.