Problem summary
The Spend value you see in Funnel for a Spotify Ad Studio campaign can be higher than the amount Spotify bills you for that campaign. This happens when the campaign delivers more impressions than its budget covers.
Error message or symptoms
Spend in Funnel doesn't match Amount Billed in Spotify Ad Studio for the same campaign and date range. Funnel shows the higher value.
When does this occur
A campaign overdelivers, meaning it delivers more impressions than its budget pays for
You compare Spend in Funnel with Amount Billed in Spotify Ad Studio
Root cause
Spotify reports Spend as the total value of all impressions a campaign delivers, not the amount it bills. Spotify doesn't charge you for impressions delivered beyond the campaign budget. When a campaign overdelivers, Spend includes those extra impressions and Amount Billed doesn't. Funnel downloads the Spend value that Spotify reports.
Solution
You don't need to take any action in Funnel. To check the data, compare Spend in Funnel with Spend in Spotify Ad Studio, not with Amount Billed. For questions about what Spotify billed you, contact Spotify.