Ask HN: Is OpenAI double-charging you lately?

2 points by sebastiennight 5mo ago ↗ HN

I noticed in the last few days multiple large charges from OpenAI for their API service, which were surprising as they usually bill us once a month and each bill from this week is as big as an entire month of usage.

When looking at those new paid invoices, they all are marked as regarding periods that we've already paid for (eg Sept-Oct 2025) and with wildly different numbers per line item compared to our actual usage from that month.

Will take it up with support, but wondering if others are going through the same issue?

2 comments

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Valdegg 5mo ago ↗

Yes, they double charged when trying to fix VAT mistakes. They charged too litle VAT for us in october-november-december, so they went on and charged those months AGAIN without any warning, with the corrected VAT.

sebastiennight 5mo ago ↗

Thanks for the feedback. The discrepancy for us seems too large to be only VAT (and the usage numbers are also vastly different). I'll report what their support gives as the explanation.