BAS overstated? How over-reported GST happens in Xero
If income has been counted twice in Xero, you haven’t just got messy books — you may have reported and paid more GST than you owed. Here’s how it happens, how to check, and how to fix it the right way.(This is general information, not tax advice — your registered agent handles the BAS itself.)
How double-counting overstates GST
The mechanism is simple. A customer pays; the invoice is marked paid. Then the bank deposit — or a batched processor payout — gets booked as fresh income on top of the invoice it was already settling. The same sale is now counted twice, so reported income is too high, and the GST calculated on it is too high. Repeat that across a year and the overstatement adds up.
How to check
Compare your reported income for a period against the real money that landed in the bank for the same period. The bank is the truth: if recorded income is materially higher than what actually came in, phantom or double-counted revenue is the likely culprit — and your BAS for that period was probably overstated too.
How to fix it properly
Fix the books first: trace each deposit to the invoice it actually paid, and reverse the phantom or duplicated income by name, backdated to the right period so each quarter reflects reality. Once the underlying figures are correct, your accountant or registered BAS agent decides whether and how to amend any lodged BAS — that part is theirs, not a DIY job.
Suspect you’ve over-paid GST?
Extrua Reconcile finds double-counted income on a read-only copy and evidences every correction for your accountant.
FAQ
How does a BAS end up overstated?
If income is counted more than once — a payment booked against an invoice and again when the deposit or payout lands — your reported sales are too high, so the GST you report and pay is too high as well.
How do I check if my GST is over-reported?
Compare reported income against the real money received in the bank for the same period. If recorded income is materially higher than what actually came in, double-counting is the likely cause.
Can I amend a BAS I've already lodged?
BAS amendments are handled by your registered tax/BAS agent or accountant — it's their call and their lodgement. Your part is correcting the underlying books so the right figures are there to work from.