Influencer marketing ROI is the revenue you can attribute to creator content, minus everything the campaign cost, divided by that cost. If creators drove $12,000 in sales on a $4,000 total spend, ROI is 200 percent (example scenario). The formula is simple. The hard part is counting every cost and catching enough of the revenue, which is where most wellness brands get the number wrong.

This guide covers the formula, what to count, how to attribute sales and why ROI looks different for supplement, peptide and longevity brands.

How do you calculate influencer marketing ROI?

Use this formula: ROI = (attributed revenue minus total cost) divided by total cost, times 100.

A worked example scenario:

• Attributed revenue from codes and links: $12,000
• Total cost of the campaign: $4,000
• ROI = ($12,000 minus $4,000) divided by $4,000 = 2, or 200 percent

If you prefer return on ad spend, divide revenue by cost instead: $12,000 divided by $4,000 gives a 3x return. Pick one metric and use it every time, so campaigns stay comparable.

What costs should go into the ROI formula?

Count every cost the campaign created, not only creator fees. Brands tend to undercount cost, which makes ROI look better than it is. A full cost line includes:

• Creator fees for every post, story and video
• Product and shipping for samples and gifted units
• Agency or tool fees, such as a retainer or a creator platform subscription
• Paid boosting if you ran creator content as ads
• Usage rights paid to run content on your own channels
• Internal hours spent on briefs, approvals and reporting

Leave one of these out and the ROI figure looks better than the bank account does.

How do you attribute sales to influencers?

Give every creator a unique discount code and a tracked link, and log both in one sheet from day one. Each method catches a different buyer.

• Discount codes catch people who watch on mobile and type the code at checkout later.
• Tracked links catch people who click straight through from a bio, story or description.
• Post-purchase surveys ("Where did you hear about us?") catch buyers who used neither.

No single method catches everyone. Treat attributed revenue as a floor, not the full number. If branded search or direct traffic rises during a campaign, note it as likely lift, but keep it out of the core ROI figure so you are not grading your own homework.

Which influencer metrics actually matter?

Track metrics that connect to money, per creator, every week.

• Cost per click: creator fee divided by link clicks
• Code uses: how many orders used each creator's code
• Conversion rate: orders divided by clicks
• Cost per acquisition: total cost divided by new customers
• Repeat orders: how many of those customers buy again

Engagement rate, views and follower growth tell you about the content. They do not tell you about sales. Use them to judge creative and to pick which creators to test next, not to judge ROI.

What is a good ROI for influencer marketing?

A good ROI is one that beats your other channels at the same customer acquisition cost. There is no universal benchmark worth trusting, because margins, price points and repeat rates differ so much between brands. A supplement subscription with high repeat orders can accept a lower first-order ROI than a one-off product.

Set your own bar before the campaign starts:

• Work out your current cost per acquisition from paid social or search.
• Decide the cost per acquisition you would accept from creators.
• Compare each creator against that bar after 30 to 60 days.

Creators who beat it get rebooked. Creators who miss it get one more test with a new hook, or they are dropped.

Why does ROI look different for wellness brands?

Wellness buyers research before they buy, so sales from a creator post often land days or weeks later. Someone watches a review, reads ingredient labels, checks a forum and comes back. A 7-day window will miss many of those sales.

For supplement, peptide and longevity brands, adjust the method:

• Measure over 30 to 60 days, not one week.
• Count repeat orders, because subscription products earn most of their margin after the first sale.
• Track by creator, not by campaign, since one strong creator can carry a weak group.
• Keep codes active after the post goes live, as older content keeps selling.

There is also a cost that never shows up in a spreadsheet: content that gets pulled. A post that makes a health claim can be removed by the platform, which turns its revenue to zero. Compliance review is part of protecting ROI.

How can you improve influencer marketing ROI?

Most ROI gains come from creator selection and repetition, not from bigger budgets.

• Pick niche fit over reach. Micro creators whose audiences already buy in your category usually convert better per dollar.
• Test hooks, not just creators. Give two creators the same product with different opening lines and compare.
• Rebook winners. Repeat posts from a creator who sold once tend to sell again, and the audience gets used to the product.
• Repurpose content. With usage rights, a creator video that sold organically can run as an ad.
• Cut fast. Drop creators who miss your cost per acquisition bar after a fair test.

What mistakes make influencer ROI look wrong?

The most common mistakes come from the inputs, not the math.

• Counting views as value. Views are reach. Unless you have a tested way to turn views into revenue, keep them out of the ROI figure.
• Short windows. Closing the books seven days after a post misses buyers who research first.
• Shared codes. If two creators share one code, you cannot tell who sold.
• Ignoring free product. Gifted units cost money even when no fee changes hands.
• Mixing campaigns. Running a sitewide sale during a creator push makes it hard to separate the two effects.

Fix these before the next campaign, and your ROI number will hold up when someone checks it.

How should you report ROI to your team?

Report ROI weekly in one sheet with one row per creator. Include creator fee, clicks, code uses, orders, attributed revenue and cost per acquisition. Add a short note on what changed and what you will do next week.

Keep the example scenarios out of the board deck. Use real numbers only, even when they are small. Small honest numbers build more trust than big estimated ones.

How Baseamp reports ROI

Baseamp gives every creator a unique code and tracked link before the first post, and sends weekly per-creator reports with clicks, code uses and attributed revenue. We work only with wellness, biohacking, longevity, supplement and peptide brands, and every post is pre-approved so it stays live long enough to sell.

FAQ

How much does an influencer agency cost?

An influencer agency typically costs $1,000 to $20,000 a month on retainer, or from $5,000 per project, based on typical ranges we see in 2026. Count that fee as part of your campaign cost when you calculate ROI, along with creator fees, product, shipping and any paid boosting.

What is an influencer marketing agency?

An influencer marketing agency is a company that plans and runs creator campaigns for brands. It finds creators, negotiates fees, writes briefs, approves content and reports on results. A good agency sets up codes and tracked links before the first post so ROI can be measured per creator.

What is the best influencer marketing agency?

The best influencer marketing agency is the one that already works with creators in your category, has a written process for claim and compliance review, and reports revenue per creator rather than only views and likes. For wellness, supplement and peptide brands, a specialist agency is usually a better fit than a generalist.