Contract-to-hire sounds like a free trial for an employee. Work with a developer for three to six months, then make them an offer if it's going well. The model works, and it is less simple than it sounds. Who employs the developer during the contract, what you owe when you convert them, and how you manage them in the meantime all carry legal and financial consequences. Most founders only discover those when they're ready to convert.
Key Takeaways
- In contract-to-hire, the developer usually works as an employee of a staffing firm (W-2) or as an independent contractor (1099) before you hire them.
- The IRS looks at control: if you direct how the work is done, the person may be your employee regardless of the contract.
- Conversion terms, including any fee, vary by firm. Read them before the contract starts.
- For developers outside the US, conversion often means switching to an employer of record, a local entity, or staying on a contractor agreement.
How the Model Works
There are three common setups.
Through a staffing firm, W-2. The developer is an employee of the staffing firm. The American Staffing Association describes the firm as handling "payroll, insurance and other benefits, and workers' compensation," while day-to-day oversight "is generally provided by the client's on-site supervisor" (ASA). When you convert, the developer moves onto your payroll.
Direct 1099 contract. You contract with the developer as a self-employed person, who gives you a Form W-9 and gets a 1099-NEC (IRS). This is the cheapest setup on paper and the riskiest if you manage them like an employee.
International contractor. A developer outside the US typically gives you a Form W-8BEN rather than a W-9 (IRS). Converting them later usually means an employer of record or a local entity, since you can't simply put them on US payroll. Our contractor vs employer of record guide covers those options.
The Classification Risk
This is the part founders underestimate. Under the IRS rule, someone is an independent contractor if you have "the right to control or direct only the result of the work and not what will be done and how it will be done" (IRS). The IRS weighs behavioral control, financial control, and the type of relationship, and says there is no "magic" number of factors that decides it (IRS).
Contract-to-hire developers usually join standups, follow your processes, and work on your roadmap. That looks a lot like an employee. Federal rules are also moving: in May 2025 the Department of Labor said it would stop applying its 2024 contractor rule in its own investigations, though that rule still applies in private lawsuits (DOL FAB 2025-1), and a 2026 proposal would rescind it (DOL). Check the current status before relying on either.
This is general information, not legal advice. If you plan to run a direct 1099 contract-to-hire for a US-based developer, talk to an employment lawyer first.
Conversion Terms to Check
| Term | What to look for |
|---|---|
| Conversion fee | Whether one applies, how it's calculated, and whether it drops over time. The ASA only says a placement fee "may be negotiated," so terms vary widely. |
| Minimum contract period | How long before you can convert without penalty |
| Non-solicitation | What happens if you hire the developer outside the agreement |
| Notice | How much notice either side gives to end the contract |
| Replacement | What happens if the developer doesn't work out during the contract |
A good agreement makes all five explicit. Our staff augmentation contract checklist goes through each clause.
A Concrete Version
A Series A fintech needs a senior backend engineer and isn't sure the role will last past its next funding round. They choose a staffing partner and bring on an engineer for an initial three-month commitment, then month to month.
Month one: the engineer ships two features and fixes a reconciliation bug that had been open for a quarter. Month three: the company raises its round and wants to make the role permanent. They check their agreement, which spells out the conversion terms, and compare two paths. Convert the engineer to direct employment and pay the conversion cost, or keep the engagement as it is because the engineer lives abroad and the partner already handles payroll, compliance, and equipment.
They choose to keep the engagement. For one engineer abroad, it's simpler than setting up an employer of record, and the engineer is happy with the arrangement. Conversion is an option, and staying on contract can be the better call.
The Honest Counterpoint
Contract-to-hire can hurt your hiring. Strong senior developers with several offers often prefer a permanent role from day one, and a "trial" framing can push them away. If the role is clearly permanent and your budget is set, a direct hire may attract better candidates. See staff augmentation vs full-time hiring.
The model also doesn't replace a good interview. A three-month trial with the wrong person costs three months of salary, three months of onboarding, and three months of roadmap. Vet as carefully as you would for a permanent hire. The real cost of a bad engineering hire shows how fast that adds up.
Frequently Asked Questions
How long should a contract-to-hire period be?
Three to six months is common. Three months is usually enough to see how someone handles real work, code review, and a production issue or two.
Can I convert an international contractor to a US employee?
Only if they're authorized to work in the US. Otherwise, conversion means an employer of record in their country, a local entity, or keeping the contractor or staffing arrangement.
Is contract-to-hire the same as staff augmentation?
They overlap. Staff augmentation places engineers on your team through a partner, and many agreements allow conversion. Contract-to-hire makes conversion the expected outcome. See what is staff augmentation. If you only need a contractor with no conversion in mind, see how to hire a contract software developer.
The Bottom Line
Contract-to-hire works when you read the conversion terms before day one, respect the classification rules, and vet as seriously as for a permanent hire. For international engineers, staying on a managed engagement is often simpler than converting. Ruzora places senior LATAM engineers on a 3-month initial commitment, month to month after that, with a replacement guarantee if an engineer underperforms on documented technical grounds. See available engineers.
Roberto Espinoza is CEO of Ruzora, which helps US startups hire pre-vetted senior LATAM engineers, with a vetted shortlist in 72 hours. See available engineers.
