The encyclopedia
Dark Pattern

The Silent Renewal

The effect

"Free trial ends. You're charged. You don't notice for months."

The method

Require a card upfront for a 'free' trial; auto-convert to a paid plan with no warning email; price the renewal as annual.

Black hat
9/10
Most common usage on the angel→devil scale
The ethics spectrum

Same hack. Three very different choices.

White hat

Trial without a card; clear renewal email 7 days before charge with one-click cancel.

Grey hat

Card required, but renewal warning email is sent and cancel is in-app.

Black hat

No warning, no email, annual charge, refund only by phone.

The template

A formula you can steal

Trial → [WARNING EMAIL N DAYS PRIOR] → [ONE-CLICK CANCEL] → only then charge.
Spotted in the wild

Where you've already seen this

  • App store 'free' subscriptions auto-charging $99/yr after a 7-day trial.
  • B2B SaaS billing the credit card for an annual term silently on day 15.
  • Streaming services rolling promo-rate users to full price with zero notice.
When to use it

Never the silent version. Trials with reminders are the white-magic alternative — and convert nearly as well.

When NOT to use it

Anywhere chargeback rates would tell the story (they will).

The 5-minute practice

Try the trick today

Add a 'your trial ends in 3 days' email with a one-click cancel link. Measure churn — usually flat or improved.

Don't get hacked
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See it in action

1 teardown use this trick