Contract to Hire Guide for Employers: Trial to Conversion

Table of Contents

Introduction

Most companies choose contract to hire for the right reason: they want to see someone's work before offering a permanent role. Then the trial runs out, the conversion decision arrives late, the salary conversation goes badly, and the person they wanted takes another offer.

A contract to hire engagement only works if you run it like a hiring process, not a waiting period. That means agreeing on conversion terms before day one, checking progress at set points, and making the offer before the contract ends.

This guide is for hiring managers and HR teams. It covers the setup, the evaluation, the conversion offer, the compliance steps, and the mistakes that cost employers good hires.

If you're new to the model, start with how contract to hire works and come back here when you're ready to run one.

TL;DR

Get permanent headcount approved before the contract starts, or a good trial can end with no job to offer.
Agree on contract length, conversion fee, salary range and success criteria with the agency upfront.
Run checkpoints at 30, 60 and 90 days so the conversion decision isn't a last-minute guess.
Make the offer two to four weeks before the contract ends, and turn the hourly rate into a salary the candidate will see as a fair move.
Conversion creates a new employment relationship, so plan Form I-9, payroll and any visa steps ahead of the start date.

When contract to hire makes sense for your role

Contract to hire works best when a role is permanent but some things are hard to judge in an interview. For example, how someone handles your codebase, works with your team or makes decisions under pressure.

It's a good fit when:

The permanent budget is likely but not yet approved for this quarter
Technical interviews haven't been good predictors for this role in the past
The team is new or changing, and you want to test how someone fits
You need someone working in weeks, not after a three-month permanent search

It's a weaker fit for senior leadership roles, and for candidates who already have permanent offers elsewhere, because many of them won't accept a trial.

For a full look at the trade-offs, see contract-to-hire benefits, pros and cons. If you're sure about the role and the person, direct hire may be faster.

Set up the contract to hire terms before day one

Most failed conversions trace back to something nobody agreed on at the start. Settle these with your staffing partner and your internal approvers before the worker begins.

Get headcount approved first

The most common reason a successful trial doesn't convert is that the permanent position was never funded. Ask finance or HR to approve the headcount before the contract starts, even if the start date for the permanent role is months away. If approval isn't possible, tell the agency and the candidate honestly.

Agree conversion terms with the agency

Term	What to agree	Why it matters
Contract length	A set term, often three to six months for tech roles	Too short to judge, too long to keep a strong candidate interested
Conversion fee	A flat fee, or a fee that drops as billable hours build up	Affects when converting makes financial sense
Early conversion	Whether you can convert before the term ends, and at what cost	Lets you move fast if someone clearly fits
Post-conversion salary range	A range shared with the candidate at the start	Prevents a surprise gap at offer time
Success criteria	Three to five measurable goals for the trial	Gives the decision a basis beyond gut feel
Benefits during the contract	What the agency provides until conversion	Candidates compare this against other offers
Non-conversion terms	Notice period and how the assignment ends	Protects both sides if it doesn't work out

Write the success criteria in plain terms. For example, "owns the payment service deployments without help by week eight" or "closes 90% of assigned tickets within the sprint." Vague goals like "good cultural fit" make the decision harder later.

How to evaluate the worker during the trial

Don't wait until the last two weeks to decide. Set three checkpoints and treat them as short, structured reviews.

Checkpoint	What to assess	Who's involved	Outcome
Day 30	Ramp-up speed, questions asked, early output	Hiring manager, worker	Adjust support or goals if needed
Day 60	Progress against success criteria, team feedback	Hiring manager, one or two teammates	Early signal on conversion, shared with the agency
Day 90	Full criteria review, readiness for permanent scope	Hiring manager, HR, agency	Convert, extend with a reason, or end

Two things make these reviews useful:

First, write down what you see, including specific tasks, not just impressions.
Second, share honest feedback with the worker at each checkpoint.

A contractor who hears nothing for three months assumes the answer is no and starts looking elsewhere.

The agency's account manager can help here too. They often hear concerns from the worker that won't come up in a review with their manager.

Making the conversion offer

Turn the hourly rate into a fair salary

Candidates think about their hourly pay, not your bill rate. The bill rate you pay the agency includes its costs and margin, so base the salary conversation on what the worker actually takes home.

A simple way to frame it:

Multiply the worker's hourly pay rate by 2,080, the hours in a standard full-time year. A worker earning $60 an hour on W-2 would see about $124,800 on that basis.
Your salary offer may come in lower, because the permanent role adds benefits, paid time off and job security.
Explain that trade clearly and put a dollar value on the benefits where you can.
A salary that looks like a pay cut, with no explanation, is a common reason good contractors turn down conversion.

Time the offer early

Make the offer two to four weeks before the contract ends. That gives time for negotiation, internal paperwork and any compliance steps.

It also shows the worker you've made a real decision instead of letting the deadline decide for you.

If you need more time, extend once with a clear reason and a new decision date. Repeated extensions without a conversion discussion usually lead the worker to take another job.

Compliance steps at conversion

Conversion moves the worker from the agency's payroll to yours. Treat it as a new hire, because legally it usually is.

Form I-9. As the new employer, you need to complete Form I-9 to verify identity and work authorization. USCIS's Form I-9 guidance covers the timing and acceptable documents.
Visa holders. If the worker is on an H-1B through the agency, a change of employer generally means your company files its own petition before the worker moves over. Start early and involve immigration counsel.

Our overview of H-1B rule changes explains the current landscape.

Worker classification. During the contract, the worker is typically a W-2 employee of the agency. After conversion, they're your employee. The IRS's Worker Classification 101 explains why the employee versus contractor line matters for taxes.

If the worker came through a corp-to-corp arrangement instead, check our C2C contract-to-hire guide before converting.

Payroll and benefits. Set a clear last day on the agency payroll and first day on yours, so there's no gap in pay or health coverage.

Why contract to hire conversions fail

What goes wrong	Usual cause	How to prevent it
No job to offer at the end	Headcount wasn't approved	Get approval before the contract starts
Worker takes another offer	No feedback or signal during the trial	Share checkpoint results and intent early
Salary offer rejected	Offer looks like a pay cut from the hourly rate	Share the range upfront and explain the benefits value
Decision keeps slipping	No agreed criteria or decision date	Write criteria and dates into the plan
Hiring manager changes mid-trial	The new manager wasn't part of the original plan	Hand over the criteria and checkpoint notes
Conversion fee surprise	Terms weren't read before signing	Agree fee schedules and early-conversion costs upfront

Most of these are process problems, not people problems. That's good news, because process is something you control.

If you decide not to convert

Sometimes the answer is no, and that's what a trial is for. Handle it well, because the worker, the agency and your team will all remember how it went.

Give the decision as early as possible and explain the reason in terms of the success criteria. Work with the agency on the notice period so the worker has time to find the next assignment.

Make sure knowledge transfer happens before the last week, and confirm that system access is removed on the final day.

If the issue was fit for this role rather than ability, say so. The agency may be able to place the same person with another client, and you may want them back for a different role later.

Getting more from contract to hire

Contract to hire is at its best when it's treated as a structured hiring decision with a longer interview built in. Fund the role, write down what success looks like, check in at set points, and make the offer before the clock runs out.

Employers who do those four things tend to convert the people they want. Employers who treat the trial as a wait-and-see period often lose them to someone who moved faster.

Before your next contract to hire req, run through the terms table above with your staffing partner and fill in every row.

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With 15 years in business and 5,000+ successful staffing engagements, we don't just fill roles, we build reliability into your process. We've supported 65 staffing companies in the past year alone and maintain MSAs with industry leaders like Robert Half and TEKsystems.

Here's what working with Consultadd looks like:

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Post-placement support so your investment grows beyond day one

For candidates, your next opportunity is more than just a job title, it's a chance to build skills, gain experience, and move your career forward. At Consultadd, we connect technology professionals with projects and employers that align with their goals, whether they're looking for contract, contract-to-hire, or long-term opportunities.

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Key takeaways

Approve permanent headcount before the contract starts, so a successful trial has a job to convert into.
Agree contract length, conversion fee, early conversion terms, salary range and success criteria upfront.
Use 30, 60 and 90 day checkpoints with written notes and honest feedback to the worker.
Base the salary conversation on the worker's hourly pay rate, explain the value of benefits, and make the offer two to four weeks early.
Treat conversion as a new hire for Form I-9, payroll and any visa steps.

FAQs

How long should a contract to hire period be?

Most tech roles run three to six months before conversion. That's long enough to see real work across a few projects without losing the candidate to permanent offers elsewhere. Pick a length that fits how quickly the role can show results.

How much does it cost to convert a contract worker to full time?

It depends on the agency agreement. Some charge a flat conversion fee, while others reduce or waive it once the worker has billed a set number of hours. Check the fee schedule and any early-conversion terms before the contract starts.

Can a contract to hire employee negotiate salary at conversion?

Yes, and many do. Candidates usually compare the offer to their hourly pay multiplied across a full year. Sharing the salary range at the start and explaining the value of benefits makes the negotiation smoother.

Do you need a new Form I-9 when converting a contractor?

Generally yes. The worker is moving from the agency's payroll to yours, so your company becomes the employer and needs to complete its own Form I-9. Plan it for the first days of permanent employment.

Can you convert a contract to hire worker early?

Often, yes, but early conversion may carry a higher fee depending on the agency agreement. If someone is clearly a fit before the term ends, ask the agency about early conversion costs and compare them with the risk of losing the person.

What happens if you don't convert a contract to hire worker?

The assignment ends under the notice terms in the agency agreement, and the worker stays employed by the agency, which can place them elsewhere. Give the decision early, explain it against the agreed criteria, and plan knowledge transfer before the last week.