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8,000 across creators in 6 months. You can see the deposits in Stripe. You can see the followers, likes, and comments in your dashboard. What you can't easily see: which dollars came from creator spend vs paid ads vs organic vs email. Without proper attribution, you're flying blind. Today: how to actually measure influencer ROI in 2026.

Why ROI measurement matters

Three reasons most AU dropshippers fail to measure creator ROI:

  1. Default attribution is broken. Last-click attribution gives all credit to the last channel before purchase — typically Meta. Your creator who introduced the product to the customer gets zero credit.
  1. Creator spend feels intuitive. "We got mentioned by 8 creators and revenue went up." Operators don't verify; they assume. This leads to over-spending on channels that aren't performing.
  1. Multi-channel touch attribution is hard. A customer sees a creator post, then a Meta ad, then your email, then buys. Which channel "earned" that sale? Without sophisticated tracking, the answer is "we don't know."

The result: most AU operators waste 30-60% of creator budget on channels they can't prove are working.

The 4-layer attribution stack

For meaningful creator ROI measurement:

Layer 1: Direct attribution (UTM links). Every creator post should include a UTM-tagged link to your store. UTM source: creator name; medium: organic-tiktok / organic-instagram; campaign: brand-name. Track click-throughs, sessions, and direct purchases in Google Analytics.

This catches "saw post, clicked link, bought immediately" sales. Captures 30-50% of true creator-attributed sales.

Layer 2: Promo code attribution. Each creator gets a unique branded promo code (e.g., SARAH15 for 15% off). When customer uses the code at checkout, you have unambiguous attribution.

This catches "saw post, copied code, bought in Shopify" sales. Captures additional 20-30% of creator-attributed sales.

Layer 3: Post-purchase survey. On order confirmation page or in welcome email, ask: "How did you hear about us?" with options including specific creators if applicable.

This catches "remembered the creator post weeks ago, found us via Google" sales. Captures 15-25% of creator-attributed sales.

Layer 4: Brand search uplift. Track Google Search Console data for branded searches before/after creator posts. A creator with 50k+ followers typically lifts your brand search volume by 5-15% for 30 days post-post.

This is the "halo effect" — sales that happen because someone searched for your brand after seeing the post. Captures the remaining 10-20% of creator-attributed sales.

Stack all 4 layers and you capture 90%+ of true creator-attributed sales. Skip any layer and you under-credit creator value.

The post-purchase survey question

The single most-revealing question:

"How did you first hear about us?"

Options to include:

Display this on your order confirmation page as a single question (don't ask 4 questions). Response rate: 25-40% in well-designed surveys. Sample is statistically meaningful at 200+ responses/month.

What you learn: which creator names get mentioned, which channels are under or over-attributed in your default analytics. Many operators discover their "Meta ROAS 2.5x" is actually 1.8x with creator attribution removed — and creator ROAS that looked weak is actually 2.0x including the halo.

Creator ROI math example

For a creator who you paid A

,500 + product (RRP A$45):

Direct attribution (UTM):

Promo code attribution:

Post-purchase survey (over 60 days):

,504 (some overlap with UTM/promo, but ~60% incremental)

Brand search uplift: