Six months to carry forward, three years to claim: two VAT deadlines

01Two deadlines, two different things

When output VAT cannot absorb all of the input VAT paid, the difference accumulates as a credit balance. Carrying that balance forward has a window: it can only be carried forward six months; past that window, whatever is unused cannot simply keep being carried forward indefinitely. The other deadline governs a standalone cash refund claim: it can be filed within three years of the filing deadline (or payment date) of the tax period it relates to, after which the right to claim also lapses. These are two independent rules and one cannot be converted into the other — running past the six-month carry-forward window does not mean there are still three years left to claim, and the three-year deadline for a cash claim is not extended just because the credit is still inside its carry-forward window.

02Why a credit balance quietly runs past six months

In the monthly return, an input-over-output balance defaults to being carried forward to the next month — unless the filer actively selects the cash refund option and signs on the refund section on the final page, the system defaults to carrying it forward again. Many companies filing monthly never look back at that section; carrying forward becomes a habit, and months later they discover the balance is already close to the edge of the window.

03Where the three-year clock on a standalone claim starts

Unlike carry-forward, a standalone cash refund claim (overpayment, misfiling, a carried-forward credit never used up the following month, and similar situations) is filed on a different form, with a different starting point: three years from the filing deadline or the payment date of the tax period concerned. That means even where a credit balance has already run past the six-month carry-forward window, as long as it is still within three years, there is often still a route to deal with the historical balance through a standalone claim — but whether that remedy applies has to be checked case by case; it does not apply to every situation.

04Missing either deadline: the refund right lapses, and it cannot be fixed after the fact

Whichever deadline is missed, the corresponding refund right lapses — supplying more documents or explaining the reason afterward does not bring it back. The longer a historical credit balance sits, the more it turns from money that could eventually be recovered into a sunk cost that, on the books, can no longer actually be recovered.

05How to avoid missing either one

Three things are worth doing routinely.

• Track the credit balance by age, not just by total amount — which month it is already in determines how much time is left before a decision has to be made.
• Decide before the carry-forward window closes whether to switch to claiming cash, rather than letting the system default carry it forward again.
• Review historical balances that have been sitting idle on their own, checking whether they are still within the three-year window and whether a standalone claim can still be filed.

How much time is actually left on a specific balance, and which route fits it best, has to be checked item by item against the accounts and the filing records — it cannot be estimated by month alone.