What is Contribution Rate?
Contribution rate is the percentage of people who completed (or submitted) a survey or form out of a defined group of invitees or visitors. It measures how many invited or reached people actually contributed answers.
Contribution rate (also called response rate in some contexts) compares the number of completed submissions to a chosen denominator — usually the number of people invited, the number of people who opened the survey link, or the eligible population. Different projects use different denominators, so it’s important to state which you mean. Contribution rate helps you understand engagement: whether people saw the invitation but didn’t take part, or whether the survey reached the wrong audience or presented barriers (for example, language, length or unclear questions).
Usage example
You emailed a parent survey to 800 families and received 120 completed submissions. Contribution rate = 120 / 800 = 15%. If 1,000 people clicked the survey link but only 120 completed it, using clicks as the denominator would give 12% (120 / 1,000). You can also compare by language: 90 completions from 400 English invitees = 22.5% contribution rate; 30 completions from 200 Arabic invitees = 15% contribution rate.
Practical application
Why it matters: contribution rate tells you how representative and effective your outreach is and highlights where follow-up is needed. In multilingual projects, comparing contribution rates by language helps spot access barriers (poor translations, unclear wording, or insufficient outreach to a community). Use contribution rate to: prioritize additional engagement, adjust communication channels, shorten or simplify questions, send reminders, or improve translations. Remember to choose and report a consistent denominator (invites, clicks, or eligible population) so comparisons over time or between groups are meaningful.
FAQ
How is contribution rate different from completion rate?
Completion rate usually refers to the share of people who started the survey and finished it (completions ÷ starts or clicks). Contribution rate most often uses invites or the eligible population as the denominator (completions ÷ invites). Be explicit about which you’re using.
What counts as a 'completed' submission?
A completed submission is an answer set that meets your project’s rules for being valid (for example, the user reached the final submit page or answered required questions). For some projects you may count partial responses if they include critical fields — just state that rule when reporting rates.
What denominator should I use for open public links?
For public links where you don’t have a list of invitees, common denominators are unique link clicks, unique page views, or an estimate of the reachable population. Each choice gives different insight: clicks measure drop-off after opening, while population estimates measure overall reach in the community.
What is a ‘good’ contribution rate?
There’s no universal benchmark — acceptable rates depend on audience, topic sensitivity, and outreach channel. In community or household surveys, double-digit rates (10–30%) are common; targeted or incentivised surveys can be higher. More important than a single number is tracking trends and comparing similar groups (for example, languages, channels or cohorts).