New Hire Turnover Calculator: 90 Day and First Year Attrition

What does new hire turnover measure?

New hire turnover is the share of people who leave within a set time after they start, usually 90 days and 12 months. It is a recruiting metric as much as an HR one, because early exits usually trace back to a mismatch made during hiring: the wrong expectations, the wrong role description or the wrong person for the manager.

Overall turnover blends people with ten years of tenure with people who started last month. New hire turnover isolates the group that recruiting and onboarding control most directly. If the overall rate looks fine but new hire turnover is high, your problem sits in hiring or the first weeks, not in pay or career paths for long serving staff.

Track two windows. The 90 day rate catches people who leave because the job is not what they were told. The first year rate catches slower mismatches, such as a weak manager relationship or a role that never ramped.

How do you calculate new hire turnover step by step?

Measure each person against their own start date, not the calendar year. Someone who joined in November and left in February counts as a 90 day leaver even though the exit crossed into a new year.

1. Pick a cohort: every employee who started in a given quarter or year.
2. Wait until every person in the cohort has passed the time window you are measuring.
3. Count the cohort members who left within 90 days of their own start date.
4. Count the cohort members who left within 12 months of their own start date. This count includes the 90 day leavers.
5. Divide each count by the cohort size and multiply by 100.
6. Split the leavers into voluntary and involuntary, and by role family, recruiter and source if your numbers are large enough.

What does a new hire turnover example look like?

A company hires 120 people in a year. Nine leave within 90 days and 22 leave within 12 months of starting. Their average base salary is 60,000 dollars. These are illustrative numbers.

The 90 day rate is 7.5% and the first year rate is 18.3%. Forty one percent of the year one leavers were gone inside 90 days, which tells you to look hard at job previews and the first month of onboarding. Using a replacement cost of 33% of base wages, the 22 exits cost about 435,600 dollars.

What is a normal new hire turnover rate?

There is no reliable public benchmark for the share of new hires who leave in their first year across US employers. Most figures you see online are survey estimates without a stated method, so we do not quote one here. Compare your rate with your own past cohorts and between departments instead.

What the research does show is how much turnover is concentrated early. The Work Institute 2025 Retention Report, built on exit interview data, says as much as 40% of all employee turnover happens within the first year of employment. The same report estimates the cost to replace an employee at 33% of base wages and calls that a conservative figure, which is why the calculator uses 33% as its default.

Note what that 40% means. It is the share of all leavers who were in their first year, not the share of new hires who leave. A company can have most of its exits in year one and still keep 85% of its new hires.

How do you find the cause of early turnover?

Start with the timing. Exits in the first two weeks usually mean the job did not match what the candidate was told, or a better offer arrived that they were still weighing. Exits between one and three months often point to onboarding, training or the manager relationship. Exits later in the first year tend to be about ramp, workload or growth.

Then split the cohort. Compare the 90 day rate by source, by recruiter, by hiring manager and by role family. With small numbers, look at a rolling year rather than one quarter so a single exit does not swing the result. A pattern that holds across two or three cohorts is worth acting on.

Finally, ask the people who left. A short exit conversation within a week of departure, run by someone other than the manager, gives more honest answers than a form. Log the main reason in a fixed list so you can count reasons over time, and share the top three with hiring managers each quarter.

How do you reduce new hire turnover?

• Give a realistic job preview. Share the hard parts of the role, the schedule and the targets before the offer, not after the start date.
• Write the 90 day success criteria at the intake meeting and repeat them in the offer conversation.
• Keep the recruiter in touch for the first 30 days. A short check in at week one and week four surfaces problems a new hire will not raise with their manager.
• Hold stay interviews at 30, 60 and 90 days to ask what is working and what is not.
• Compare 90 day turnover by source and by hiring manager. A single manager with repeated early exits is a management issue, not a sourcing one.
• For agencies, track falloffs inside the guarantee period by client and by recruiter, since each one costs a fee or a free replacement.

What mistakes should you avoid?

• Dividing new hire exits by total headcount. That produces a tiny number that hides the problem.
• Measuring a cohort before its full year is over and calling the result a first year rate.
• Mixing in seasonal or fixed term hires who were always meant to leave.
• Ignoring involuntary exits. A new hire let go in month two is still a hiring miss.
• Blaming recruiting for every early exit without checking onboarding, manager quality and whether the job changed after the offer.