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B2B SaaS12 min read·5 pages·Published January 2026

Justifying Upper-Funnel Ad Spend: How Multi-Touch Attribution Reveals Assist Conversions

Upper-funnel ad spend is the first thing a finance team cuts because it never wins on last-touch. Multi-touch attribution exposes the assist conversions those campaigns create, and gives you the data to defend the budget. This guide shows how.

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Key takeaways

  • Why last-touch undervalues every brand and awareness dollar
  • How to read assist conversions without falling for vanity
  • Which channels typically over-index on assists in B2B SaaS
  • How to build a position-based model that rewards true journeys
  • How to defend brand budget to your CFO with one chart
Chapter 01

Last-touch is a story about endings

Last-touch attribution gives 100% of the credit to whichever ad happened to be clicked closest to the conversion. In B2B SaaS, that's almost always a branded search ad. Branded search looks like a hero. Brand, podcast, content, and influencer spend look like waste.

The reality is that branded search is mostly capturing demand created upstream. Cut the brand and the branded-search numbers crash a month later.

Chapter 02

Assist conversions tell the truth

An assist conversion is any touchpoint in the buyer's journey that wasn't the last click but contributed to the deal. Multi-touch attribution gives partial credit to each assist, weighted by position or by a custom model.

The first time most B2B SaaS teams turn this on, they discover that 30-50% of pipeline is influenced by upper-funnel touches the last-touch report never showed.

Chapter 03

Defend the budget with one chart

Build a single chart that compares last-touch revenue to multi-touch influenced revenue, broken down by channel, for the last full quarter. Show it to your CFO. The conversation about brand spend gets easier, immediately.

Put it into practice

See your pipeline by source, campaign, and ad.

Cometly connects every ad dollar to pipeline and revenue, so you can scale what’s working and cut what isn’t.