Form Abandonment Rate

The percentage of users who start filling out a form but leave without submitting it.

Form Abandonment Rate = ((Forms started − Forms submitted) / Forms started) × 100%

What it measures

The proportion of users who interact with at least one form field but never submit. A form is "started" when a user focuses on any field. Tracks the gap between intent (starting the form) and completion (submitting it). High abandonment points to friction in the conversion path.

Benchmarks

Checkout forms: 65–75% abandonment is typical
Registration/signup forms: 40–60% abandonment
Contact forms: 20–40% abandonment
Each additional form field increases abandonment by approximately 4–5%

What to watch

Rising abandonment: Check for newly added fields, broken validation, confusing labels, or mobile layout issues. Segment by device type—mobile abandonment is typically 10–15% higher than desktop. Also check if users are abandoning on a specific field, which reveals exactly where friction lives.
Low abandonment: Good, but verify your form isn’t so short that it’s under-qualifying leads. A signup form with near-zero abandonment but high post-signup churn may need more qualifying fields, not fewer.

When NOT to use

For forms that are intentionally exploratory (search boxes, filters). These have high "abandonment" by design because users interact without always submitting.

In practice

A fintech startup saw 72% abandonment on their account application form. Field-level analysis showed users dropping off at the "employer phone number" field. Removing that single field (which wasn’t required for underwriting) dropped abandonment to 51% and increased completed applications by 73%.