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Lab // Paid Media Math

How tax on ad invoices changes your real ad budget

By Kartikeya AwasthiPublished 1 min read
The short answer

When an ad platform adds tax to your invoice, the real cost is the budget times one plus the tax rate, unless you can claim the tax back. Plan budgets before tax, report ROAS on the same basis and record tax separately for cash flow. US advertisers usually see no such tax on these platforms.

Key takeaways
  • Invoice = budget × (1 + rate).
  • Recoverable tax does not change effective cost.
  • Keep one basis in every report.

The arithmetic

A $10,000 budget with 13% tax becomes an invoice of $11,300, which is $1,300 of tax. If the tax is not recoverable, your break-even ROAS rises by 13%.

In Canada

In India

Free tool / Tax arithmetic

What does an ad budget cost after tax?

Ad Spend Tax Calculator

Questions about Paid Media Math

Does the platform budget include tax?

Usually no. Budgets exclude tax and invoices add it.

Which ROAS should I report?

Report on the pre-tax budget when tax is recoverable, and include tax when it is not.

Key terms

Written by

Kartikeya Awasthi, Co-founder, InTrendz Media

Kartikeya has 12 years of experience across Accenture, EY, Coforge and other enterprises. He holds an MBA from NMIMS Mumbai and has received CII National Gold and Silver awards for AI and Industry 4.0 work. He writes and reviews every Growth Lab article. More about the author

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