Spend vs revenue per influencer with payback and effective CPA.
Inputs
Flat fee or guaranteed minimum
COGS of gifted product, if any
% of sales paid to creator
From discount code or UTM
Margin on the products sold
Number of attributed orders
Results
ROAS—x
Total cost
—
Gross margin $
—
Net profit
—
Per-order economics
Effective CPA
—
AOV
—
Margin per order
—
Cost breakdown
Cost
Amount
% of total
About this calculator
Influencer ROI is the most-fudged number in performance marketing. The combination of fuzzy attribution, halo effects, and creator-promoted EMV makes it easy to inflate numbers. This calculator strips it back to actual cash math: total spend (fee + gifted product cost + commission) divided into attributed revenue, then translated to gross-margin profit.
The honest math has three line items. First, the influencer fee — flat dollars paid for the partnership. Second, the cost of any gifted product (COGS only, not retail price — gifting at retail value inflates cost). Third, affiliate commission on driven sales. Sum those three, divide attributed revenue by the total, and you have ROAS.
The trickier number is attributed revenue. Use unique discount codes (most reliable), UTM-tagged links (good if you have analytics infrastructure), or pre/post traffic lift (crude but better than nothing). Don\'t trust influencer-reported "engagement" numbers — those are vanity metrics that don\'t convert to revenue.
Watch out for two common over-counting errors. First, including earned media value (EMV) in ROI — EMV is brand-awareness-adjacent and shouldn\'t be in a direct-response ROI calculation. Second, attributing organic search and direct-traffic lift to influencer posts when those would have happened anyway. The cleanest test is comparing same-week revenue against a pre-post baseline. Pair this with the Influencer CPM and Sponsorship CPM tools to compare partnership economics across types.
Frequently asked questions
How do I attribute revenue to an influencer?
Three methods. Best: unique discount code per influencer (5-15% lift) tracks redeemed orders directly. Good: dedicated UTM-tagged link with affiliate-style tracking. Crude: pre/post lift in store sessions during posting window. Stack 2+ methods to triangulate when one is unreliable.
What's a good ROI on influencer marketing?
3-5× ROAS in the first 30 days is solid. Below 2× usually means audience-product mismatch or wrong creator tier. Above 5× is exceptional and often comes from creators with deeply pre-qualified audiences (niche micro-influencers with high engagement, not macro creators).
Should I include earned media value (EMV) in the ROI?
Cautiously. EMV is a fuzzy metric calculated from estimated impression value but doesn't represent actual dollars earned. Including it often inflates ROI by 2-5×. Use EMV as a directional signal for brand-awareness campaigns, not as part of direct-response ROI.
How long does an influencer post pay back?
Typical post produces 60-80% of attributable revenue within 7 days, 90%+ within 30 days. After 30 days, attribution becomes very fuzzy — branded search lift and direct visits don't cleanly tie back. For evergreen content (YouTube, blog), payback can extend 6-12 months.
Should I pay creators flat fee or affiliate commission?
Depends on your goal. Flat fee: predictable cost, creator delivers content regardless of performance, you bear the risk. Affiliate commission only: creator bears risk, you only pay on results, but top creators won't agree to commission-only terms. Hybrid (small flat + commission) works best for ongoing partnerships.