incremental margin
Also called: incremental contribution, incremental lift
The extra contribution margin that exists only because of a marketing activity: results above the baseline, multiplied by the margin per deal or unit. It is the honest numerator for judging a campaign, unlike total revenue in the period.
Incremental margin is the extra contribution margin that exists only because of a marketing activity: (result − baseline) × contribution margin per unit. It combines two corrections. The baseline removes what would have happened anyway; contribution margin instead of revenue removes the costs that come with every sale (for a tutoring school, the tutor's payout and the video bill).
The unit can be a sale, a lesson, a contract or an opportunity. When the result is counted in opportunities, each one needs a value: the share of opportunities that are won × what a won client buys in the first year × the margin per unit. That value is an assumption and should be checked against real won deals later, but using the same yardstick for every channel makes the channels comparable.
Incremental margin is the honest numerator for judging a campaign. Subtract the campaign's cost and you get what the campaign added after paying for itself; divide that by the cost and you get the return on marketing investment. Revenue in the period, or all growth over last year, are not substitutes: they credit marketing with sales it didn't cause and with money that goes straight back out as costs.
Example
In spring 2026 Klasna for Teams ran a webinar series for HR managers that cost 20,000 UAH. New clients took 200 lessons in June–August 2025 and 310 in June–August 2026. In the cities the webinars didn't target, the same figure grew 15%. Each lesson brings 339 UAH of contribution (800 price − 430 tutor − 31 video and AI).
Two tempting shortcuts give very different answers. Without the control, the extra is 310 − 200 = 110 lessons, 110 × 339 = 37,290 UAH, or 17,290 after cost. Using revenue, 310 × 800 = 248,000 UAH, or 12.4 times the spend, which credits the webinars with lessons that would have happened anyway and with the tutor's pay.
The same method for opportunities: one opportunity is worth 0.2 × 480 lessons × 339 = 32,544 UAH (a planning assumption), so the autumn campaign's 13 extra opportunities are worth 13 × 32,544 = 423,072 UAH of incremental margin.
Common mistakes
- Using revenue instead of contribution. Revenue includes costs that leave with every sale; the campaign looks many times better than it is.
- Using total growth instead of growth above the baseline. Sales that would have come anyway are not the campaign's.
- Forgetting costs that grow with new clients. If some clients need much more service (coordination, no-show lessons paid to tutors), the margin per unit for them is lower.
- Never checking the value per opportunity. An assumed win rate and first-year volume are fine for planning; compare them with real won deals.
- Counting the same extra twice. When several channels touch one deal, split the extra once; channel results should add up to the total.
Learn it in the course
- Measuring marketing with a baseline · Why "the webinars returned twelve times their cost" is wrong: a baseline from the same months last year and a control group, incremental margin instead of revenue, and an honest ROMI.