Your cost today
Developers on your team
25 test cases per developer will get most products to 80% end-to-end test coverage.
Team size is a good indicator of your app’s testing footprint.
5
Developer salary
$150,000 is a good benchmark for US-based, full-time developers.
$150,000 / year
Current sprint length
This calculator assumes working time as: 8 hours per day, 5 days per week, 20 days per month, and 48 weeks per year.
2 weeks
Time your team spends on QA per sprint
QA includes time to maintain automated E2E tests.
10 %
Yearly cost on QA
Yearly time spent
Estimated tests
A developer focused on QA 100% can maintain about 50 tests.
Estimated tests to fix
We found that 7.5% of tests fail per run.
Assuming 1 run per working day, 5 days per week.
Estimated coverage
This is based on how much time your team currently spends on QA.
We’ve found team size is a pretty reliable indicator of your app's complexity and how many test cases you likely need.
For an app to get 80% end-to-end test coverage, expect to need about 25 tests cases per developer.
What's needed for 80% coverage
Automating your E2E tests
More developers does not mean more coverage. To increase coverage:
• Hire people who will focus 100% on QA
• Increase current team's QA time
Why coverage matters
High end-to-end test coverage allows your team to deliver more value to customers, capture more of the market, and solve problems more efficiently.
The value of E2E test coverage isn’t just in spotting regressions—it’s in the safety, security, and confidence to make the big moves that drive successful companies forward.
Tests for 80% coverage
We’ve found team size is a pretty reliable indicator of your app's complexity and how many test cases you likely need.
For an app to get 80% end-to-end test coverage, expect to need about 25 tests cases per developer.
Tests to fix
QA Wolf's data shows that high-velocity teams with daily releases see 7.5% of tests fail.
Time to investigate & fix includes re-running the test, reproducing the failure, debugging, PR reviews, and re-deploying the test code.
Assuming 20 working days in a month.
Assuming 1 run per day
Time needed on QA
This is how much time your team should be spending on QA for 80% coverage.
Assumes 1 run per day and 20 working days in a month.
Cost for your devs to reach 80% coverage on their own
Not including infrastructure costs.
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