VAT on digital advertising is how value added tax applies to what you pay Google, Meta, Microsoft, LinkedIn and other platforms for ads. Depending on which company bills you and whether your ad account holds a valid UK VAT number, the invoice either adds UK VAT at the standard rate of 20% or shows no VAT and a note that the reverse charge applies.
This entry explains the mechanics so you know what to look for. It is not tax advice: your accountant should confirm the treatment for your business.
How VAT on ad spend works
Advertising is a service, and when one business sells services to another, the general rule is that VAT is due where the customer belongs. In practice there are three common outcomes for a UK advertiser.
- The billing company charges UK VAT. The invoice shows 20% on top of the spend. If you are VAT-registered and the advertising is for your business, you can normally reclaim it as input tax.
- The reverse charge applies. When an overseas supplier bills a VAT-registered UK business, the invoice carries no VAT. You account for the VAT yourself on your return, as both output tax and input tax, so for most fully taxable businesses the net effect is nil.
- You are not VAT-registered. A platform may treat you as a consumer and add UK VAT, which you cannot reclaim. Separately, the value of reverse-charge services can count towards the VAT registration threshold, which catches some growing businesses out.
The deciding facts are the legal entity named at the top of your invoice and the business details on the account. In Google Ads these sit in the payments profile; Meta and Microsoft hold them in their billing settings. Platforms do change their billing entities from time to time, so check your current invoice rather than relying on what was true a few years ago.
Why it matters
Cash flow is the first reason. In most ad platforms the spend figures in the interface exclude VAT, so where VAT is charged, the money leaving your account is a fifth higher than the budget you set.
The second is businesses that cannot reclaim all their VAT. Many in finance, insurance, healthcare and education are partly exempt, and for them reverse-charge VAT on advertising can be a real cost rather than a wash. That changes what the campaigns truly cost, and it should change the targets.
The third is reporting. If you compare revenue including VAT with spend excluding VAT, your return on ad spend looks better than it is. Pick one basis, usually net of VAT, and use it everywhere.
Common mistakes
- No VAT number on the account. A registered business gets charged VAT it then has to reclaim, or ends up with invoices that do not match its records.
- Missing reverse-charge entries. Leaving reverse-charge invoices off the VAT return because “there was no VAT on them”.
- Wrong business address or country on the billing profile, which can change the billing entity and the VAT treatment.
- Mixing gross and net figures when judging campaign profitability.
- Not filing invoices monthly. Platform invoices are easy to download and easy to forget until the quarter end.
How to act on it
Download the latest invoice from each platform you use. Note the billing entity, its address and whether VAT is charged or the reverse charge noted. Check the business name, address and VAT number on each account match your records. Hand the set to your accountant and ask them to confirm the treatment and whether any partial exemption applies.
Then set your targets on the same basis as your accounts. The ROAS and break-even calculator works on whichever figures you enter, so feed it net revenue and net spend. If you would rather have billing set-up checked as part of running the account, it is included in my PPC management.