Your onboarding process starts long before day one. It starts with the promises you make in the job advert and the interview. When the reality a new hire meets doesn’t match those promises, no welcome pack will save you. They’ll be gone within 90 days, and they’ll take your recruitment budget with them.
Picture it. Someone is sold an innovative, supportive culture. On day 14 they meet Barry, who has been doing things the same way since 2009 and has no interest in changing. The gap between what they were promised and what they found is where your onboarding process leaks money.
This post explains why so many new hires leave early, what each early leaver really costs, and the two fixes that close the gap.
Table of Contents
The scale of the problem
Early departures are common. Jobvite research reported by Fast Company found that about 30 per cent of new hires leave within 90 days. And doubts set in fast: a 2023 BambooHR survey found that 44 per cent of new hires had regrets or second thoughts within their first week.
That means your onboarding process has days, not months, to prove that the job is what the new hire was told it would be.
What an early leaver really costs
When a new hire leaves in their first 90 days, you lose far more than a salary. Add up:
- Recruitment costs you can’t get back: agency fees, advertising, and the hours spent shortlisting and interviewing.
- Ninety days of low productivity: new hires typically work at a fraction of full output while they learn the role.
- Manager and team time: training, shadowing and answering questions, all for someone who won’t stay.
- Starting again: another recruitment round, and another ramp-up period.
To put a figure on it for your business, try our employee turnover cost calculator.
The real cause: expectation versus reality
Most early leavers don’t leave because the onboarding process was badly organised. They leave because the job isn’t the one they were sold. Recruitment tends to pitch the Lamborghini: the exciting projects, the brilliant culture, the fast progression. Job adverts have their own translations too. “Fast-paced” can mean understaffed, and “wear many hats” can mean nobody knows who does what.
New hires notice the gap quickly, and that’s when the second thoughts begin. A strong company culture only helps if what you describe is what people actually find.
Fix 1: tell the truth in your hiring messages
The cheapest onboarding fix happens before the offer. Give candidates an honest preview of the role, including the hard parts.
At Wotter, founder Fraser tells every new hire that it “will be the hardest job you ever work in”, and then explains why: he pushes people to be better versions of themselves every day, and he’s always asking how they could improve things, even things that are already good. The people who join know what they’re signing up for, and the ones who wouldn’t enjoy it rule themselves out before anyone has spent money onboarding them.
- Describe a typical week honestly, including the frustrating parts.
- Let candidates speak to people already in the team, without a manager in the room.
- Check that your job advert matches the role as it really is today.
Hiring for fit also matters. Our post on hiring for cultural fit covers how to do it without hiring clones.
Fix 2: treat onboarding as a documented process
Onboarding fails when it lives in one manager’s head. Write your onboarding process down, with owners and dates, so that every new hire gets the same experience whichever team they join. Our 90-day onboarding checklist gives you a ready-made plan to start from.
- Plan the first 90 days, not just the first week, with clear goals at 30, 60 and 90 days.
- Schedule check-ins at the end of week one and at days 30, 60 and 90.
- Ask the expectation question directly: “How does this compare with what you expected?”
- Listen continuously. Exit interviews come too late, and leavers rarely tell you the real reason. Short, anonymous check-ins throughout employee onboarding surface problems while you can still fix them. Wotter is one example of a tool that does this.
For more on keeping people beyond their first 90 days, read our post on ways to retain top employees.
Frequently asked questions
What is an onboarding process?
An onboarding process is the set of steps that take a new hire from accepting an offer to being fully productive and settled in the team, usually over the first 90 days or more.
Why do new hires leave within 90 days?
The most common reason is a gap between what they were promised during recruitment and what they find in the job. Poor support from their manager and unclear expectations also play a big part.
How long should the onboarding process last?
At least 90 days. Many organisations continue structured onboarding for six months or longer for complex roles.
What is a realistic job preview?
A realistic job preview gives candidates an honest picture of the role, including its challenges, before they accept. It helps people who wouldn’t enjoy the job rule themselves out early.
How do you measure onboarding success?
Track 90-day new-hire attrition, time to full productivity and how new hires rate their experience against their expectations at regular check-ins.
Close the gap before it costs you
Your onboarding process can’t fix a broken promise. Tell candidates the truth about the role, document onboarding so every new hire gets the same support, and listen throughout the first 90 days. Fewer people will leave early, and the ones who stay will be the ones who wanted the job you actually have.
For the full conversation, listen to Episode 20 of Strategic HR Weekly.
