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Affiliate tracking: cookie vs coupon vs email domain matching for SaaS
How to choose an attribution method you can still defend on payout day
If you’re choosing affiliate tracking for a SaaS program, the hard part is not tracking a click. The hard part is choosing a rule you can defend when payouts happen.
This guide breaks down affiliate tracking cookie vs coupon (plus email domain matching): what each method is good for, what breaks first, and a simple default you can copy/paste.
Quick answer
For most SaaS affiliate programs, use link-based cookie attribution as the primary rule, allow coupons only for named partners, and treat email domain matching as a manual review signal rather than an automatic commission trigger.
Table of contents
Definition and when it matters
Attribution is the rule that decides who gets credit for a conversion. If the rule is unclear, you will see disputes during payouts.
Options and tradeoffs
Cookie (link) attribution
Best when you want clean tracking without discounts. Breaks when users switch devices or block cookies.
Coupon attribution
Best for creators who need a code. Breaks when coupons leak to deal sites and you pay for customers you would have gotten anyway.
Email domain matching
Useful in B2B when partners refer companies and you want a second signal. Breaks when people sign up with personal emails first.
Recommended default
| Method | Best for | What breaks first |
|---|---|---|
| Cookie / link attribution | Clean non-discount tracking | Cross-device or cookie resets |
| Coupon attribution | Creators who need a code | Code leakage and low-incrementality discounts |
| Email domain matching | B2B referrals and partner review | Users signing up with personal emails first |
- Use link attribution as the primary rule
- Allow coupons only for named partners
- If you add domain matching, treat it as a manual review signal
Copy/paste templates
Template: coupon fallback
Coupon fallback: If a coupon code is used, we attribute the conversion to the coupon owner unless a different affiliate link click happened within the last 24 hours.
FAQ
What is the best default affiliate tracking method for SaaS?
The safest default is link-based attribution with a clear last-click window. It is easier to explain, easier to audit, and less likely to turn your affiliate program into a blanket discount channel.
Should coupon codes override affiliate links?
Only if you write that rule down. Many SaaS teams use a coupon fallback rule instead: the coupon gets credit unless a different qualified affiliate click happened in the last 24 hours.
Should I use coupons from day one?
Only if your partners require them. Coupons are powerful, but leakage is real.
Related pages
- Stripe affiliate tracking
- Affiliate tracking last-click vs first-click
- Affiliate tracking debugging guide
- Affiliate payout rules template
- Affiliate clawback policy template
- Affiliate payout schedule generator
- Marginal revenue calculator
- Video link generator (UTM)
Final takeaway and next step
Next step today: write your rules in one page, then test with a small pilot before you scale.
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