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Challenges guide

Measuring challenges that finish

Most teams over-measure and under-decide. Twenty dashboards, no verdict. The honest answer is that six KPIs cover almost every challenge you will run. Pick the primary one before launch, write it on the brief, defend it through the QBR. The rest of this page tells you what each number should look like and what to do when it slips.

Best forLifecycle, growth, ops
Reading time7 minutes
Last updatedApril 2026

Key takeaways

  • Pick a primary KPI before launch. Twenty dashboards on launch day means twenty conversations and zero decisions.
  • Watch step-1 completion on day one. It is the leading indicator for the rest of the campaign.
  • Mid-funnel completion is the most-improvable number. A milestone reward in the slump fixes most dips.
  • Repeat-user lift versus a matched control is the truest signal. Without a control cohort, you are guessing.
  • Redemption velocity tells you the prize is wrong, not that the customer is. Below 60 percent, change the reward.

Pick one

The primary KPI per challenge type

Decide before launch which one number you will defend. Everything else is supporting view.

Onboarding

Day-7 activation rate. Compare cohort that joined the challenge to a matched control.

Habit formation

Repeat-day rate vs control. Watch the tail; habit lift compounds for weeks past completion.

Cross-sell

Category penetration in the new categories during the window plus 14 days.

Tentpole brand

Earned media and share rate. Internal participation is secondary.

Sales contests

Quota attainment by segment. Aggregate participation tells you nothing about whether sellers won deals.

Recovery / re-engagement

Reactivation rate and repeat purchase within 30 days.

The six KPIs

Healthy ranges for any challenge format

KPIWhat it measuresHealthy range
Enrolment rateEligible users who joined the challenge (auto-enrol or opt-in).20 to 45%
Step 1 completion rateOf those enrolled, the share who completed step 1. Leading indicator on day 1.70 to 90%
Mid-challenge completionShare who completed at least half the steps. Most-improvable metric.40 to 65%
Full completion rateShare of enrolled users who finished every step inside the window.20 to 45%
Reward redemption rateOf completers, the share who redeemed the reward within 14 days.60 to 85%
Repeat-user lift vs controlRepeat behaviour of completers vs matched non-participant control after the challenge ends.+15 to +35%

The funnel

The drop-off between launch and finish

Funnel

Where the cohort goes between launch and finish

ReachedEligible audience100%Enrolled20 to 45% healthy35%Mid completion40 to 65% of enrolled22%Finished20 to 45% of enrolled12%

Watch step-1 completion on day 1, mid-funnel completion at the halfway point, and full completion when the window closes. Each step is what you can act on.

When it slips

What to do when each KPI is below range

Mistake

Enrolment is below 20 percent.

Fix

Auto-enrol with a clear opt-out instead of opt-in. Surface the challenge on the home screen on day 1. Most enrolment problems are visibility problems.

Mistake

Step 1 completion is below 70 percent.

Fix

Step 1 is too hard. Replace with a sub-60-second action. Heavy decisions go later in the arc, not at the start.

Mistake

Mid-funnel completion is below 40 percent.

Fix

Add a milestone reward at 40 to 60 percent progress. The mid reward fixes the slump 70 percent of the time.

Mistake

Full completion is below 20 percent.

Fix

Either the window is too short, the threshold is too high, or the reward is hollow. Audit all three; do not change the reward first.

Mistake

Reward redemption is below 60 percent.

Fix

The reward is wrong. Switch type (perk, sample, status) or run a quick survey. Redemption velocity is more about reward design than about the user.

Mistake

Repeat-user lift is below +15 percent.

Fix

The challenge is fun but not behaviour-changing. Reframe the steps so they require the target behaviour, not adjacent actions.

Reporting

A weekly cadence that scales

Daily during the window

Step 1 completion, enrolment rate. These are the leading indicators; act inside 48 hours if they slip.

Weekly during the window

Mid-funnel completion, drop-off rate, reward redemption. These tell you whether the structure is working.

Post-window (week 1)

Full completion rate, reward redemption, immediate repeat behaviour. Most rewards redeem within 7 days.

Post-window (week 4)

Repeat-user lift vs control. The truest signal of behaviour change. Patience is required.

Related reading

Where to go next

Guide
Challenges (parent)

The umbrella guide on challenge mechanics.

Guide
Challenge objective design

What to fix when first-step or mid-funnel completion slips.

Guide
Challenge reward design

What to fix when redemption is weak.

Guide
Challenge timelines

What to fix when the window is wrong.

Guide
Challenge examples

Industry patterns with their typical KPI shapes.

For developers

For developers

Pull challenge KPIs via the API

GET /admin/challenges/:id/report returns enrolment, step completion, reward issuance and redemption per cohort. Pipe to your warehouse via webhooks for long-term reporting.

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