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The Ultimate Guide to Salesforce Marketing Attribution in 2027
If you're a marketer using Salesforce, you know how challenging it can be to connect your campaigns to actual revenue

Salesforce marketing attribution starts with whatever Salesforce gives you out of the box. That's a Lead Source dropdown, a Primary Campaign Source that hands one campaign all the credit, and Customizable Campaign Influence for teams willing to configure it. All three still ship with Salesforce today. None of them, used alone, tells you which mix of campaigns produced a closed-won deal.
We broke down each of those models in a guide for SalesforceBen, published in July 2025. The native models it covers haven't changed since. Salesforce has renamed Marketing Cloud Next to Agentforce Marketing and added AI agents to campaign building. Attribution inside Salesforce still runs on the same campaign and opportunity data.
What are the native attribution models in Salesforce?
Salesforce has three native ways to credit marketing for revenue: the Lead Source field, Primary Campaign Source, and Customizable Campaign Influence. Lead Source records a channel. Primary Campaign Source gives one campaign full credit for an opportunity. Customizable Campaign Influence splits credit across several campaigns. In Sales Cloud that means Primary Campaign Source or a custom model you build, and Account Engagement adds first-touch, last-touch and even-distribution models.
| Model | What gets the credit | Where it falls short |
|---|---|---|
| Lead Source | The channel picked from a dropdown when the lead is created, inherited by the contact and opportunity | Manual and channel-level only, with no campaign detail |
| Primary Campaign Source | The last campaign that touched the lead before it converted | Single-touch, and only set at conversion or by hand |
| Customizable Campaign Influence | Every campaign linked to the opportunity's contacts, weighted by the model you choose (first-touch, last-touch and even distribution need Account Engagement) | Depends on contact roles and campaign membership, so an ad click that never becomes a campaign member doesn't count |
The guide walks through:
- Lead Source, the simplest form of attribution and the easiest to get wrong, since someone picks it by hand
- Primary Campaign Source, which is last-touch attribution under another name
- Customizable Campaign Influence, plus the first-touch, last-touch and even-distribution models that come with Account Engagement
- How auto-association links campaigns to opportunities, and the rules you can layer on top
- What all of these miss, and how multi-touch attribution inside Salesforce fills the gap
Still reporting on Primary Campaign Source? Start with the Campaign Influence section. It's the biggest attribution upgrade you can make without buying anything.
Read the full Salesforce marketing attribution guide on SalesforceBen
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