ROI calculator

What would 10.9% less churn be worth?

In a randomized controlled trial across 45,685 Allianz customers, personalized video cut renewal churn from 12.8% to 11.4%: a 10.9% relative reduction in a single product flow. Put your own numbers in and see what that effect would mean on your book.

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01 · The renewal math

Your renewal book

Optional: unlocks the revenue estimate.

Modeled effect

≈ 698Customers retained per yearcustomers who would have left and now stay
11.4%Churn after the modeled effectapplying the trial's 10.9% relative reduction
—Revenue retained per yearAdd an average value to see this.

How this is modeled

The calculator applies the trial's relative churn reduction (10.9%) to your baseline: customers retained = renewals × churn × 10.9%. That figure comes from one trial, in one product flow, in one market. Your journey, baseline and customer mix will differ, so treat the output as the start of a business case, not a promise. The way to get your real number is the way Allianz got theirs: run the journey as a randomized trial.

FAQ

Questions about the model

How is the ROI calculated?

Customers retained per year = customers up for renewal × your churn rate × 10.9%, the relative churn reduction measured in the Allianz renewal trial. Revenue retained multiplies that by your average annual customer value. The calculator runs entirely in your browser; nothing you enter is sent or stored.

Where does the 10.9% churn reduction come from?

From a randomized controlled trial Allianz ran from May to August 2025: 45,685 renewal customers were randomly split between standard email and personalized video in the 100 days after a price increase. Churn was 12.8% in the control group and 11.4% with video, a 10.9% relative reduction in a single product flow. The full design and results are on the proof page.

Will we see the same effect?

Not necessarily: the result is specific to one journey, market and baseline, and your churn drivers may differ. What transfers is the method. Start with one journey, split the audience randomly, and measure against your own control group. We help you set that up, so the number you scale on is yours, not ours.

Explore more

The Allianz trialsRenewals & retentionThe Skip Player

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Pressure-test these numbers.

Tell us the journey and your renewal volume. We'll walk you through the trial design, what shipping it took, and what a controlled pilot would look like for you.

  • −10.9% churn
  • 13 → 36 NPS
  • 41–52% click-to-open

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