Contractor vs Full-Time Developer
The contractor-versus-full-time decision is one of the most common and consequential hiring choices in tech. Blog posts give vague "it depends" answers, but the math is concrete when you model it correctly. This page provides a rigorous total cost of ownership (TCO) model with scenario analysis, break-even calculations, and a framework for deciding which model fits your situation.
Side-by-Side TCO Model
This model compares a US-based contractor at $100/hour (approximately equivalent to a $150K salary) against a full-time employee at $150K base salary. Both scenarios assume a mid-level software engineer in a Tier 2 market.
| Cost Component | Contractor ($100/hr) | Full-Time ($150K) |
|---|---|---|
| Base compensation (Year 1) | $208,000 | $150,000 |
| Benefits (health, 401k, etc.) | $0 | $52,500 |
| Payroll taxes (employer portion) | $0 | $11,475 |
| Equipment and software | $0 | $3,500 |
| Recruitment cost (one-time) | $0 | $15,000-$30,000 |
| Onboarding productivity loss | $8,000 | $18,750 |
| Staffing firm markup (baked into rate) | Included | N/A |
| Management overhead premium | $8,000 | $0 (baseline) |
| Year 1 Total | $224,000 | $251,225-$266,225 |
| Year 2 Total | $216,000 | $217,475 |
| 3-Year Cumulative | $656,000 | $686,175 |
In Year 1, the contractor is $27,000-$42,000 cheaper because recruitment costs are eliminated and benefits are not provided. By Year 2, the gap narrows to near parity as the one-time FTE recruitment cost has been absorbed. Over 3 years, the FTE is approximately $30,000 more expensive in total but provides significantly more value through institutional knowledge, team integration, and eliminated transition costs.
Break-Even Analysis
The break-even point where full-time employment becomes cheaper than contracting is typically 8-14 months, depending on the benefits package and recruitment cost. For a $150K role with standard benefits (35% loading) and $20,000 recruitment cost, the break-even is at month 11. If you can reduce recruitment cost to $8,000 through direct sourcing, the break-even moves forward to month 8.
Rule of thumb: If you need the role for less than 8 months, hire a contractor. If you need it for more than 14 months, hire full-time. Between 8-14 months, the decision depends on other factors: knowledge retention needs, team integration importance, and your ability to convert contractors to full-time if the role extends.
Scenario Comparison
Short engagements strongly favour contractors because recruitment costs and ramp time are disproportionately expensive relative to the engagement length. The contractor starts immediately and leaves when the project ends with no severance obligation.
At 12 months the contractor still has a cost advantage, but the gap is narrowing. If the role is likely to extend beyond 12 months, the conversion cost from contractor to FTE ($10K-$15K) makes the overall economics favour starting with a full-time hire.
For ongoing roles, full-time employees win on total cost from Year 2 onwards and provide vastly better knowledge retention, team cohesion, and institutional continuity. The Year 1 premium is an investment that pays back $40K-$60K annually from Year 2.
Hidden Contractor Costs
The hourly rate comparison understates the true cost of contractors because several significant costs are invisible in the rate. These hidden costs add $15,000-$40,000 per year to the effective contractor cost, significantly narrowing (and sometimes eliminating) the gap with full-time employment.
Management Overhead
$6,000-$12,000/yearContractors require 20-30% more management time than FTEs. They need more context for each task, require explicit documentation (they can't rely on institutional knowledge), and need more frequent check-ins to stay aligned with evolving priorities. At a manager's blended rate of $80-$100/hour, this adds 60-120 hours annually.
Knowledge Transfer Risk
$10,000-$30,000 per transitionWhen a contractor's engagement ends, their knowledge leaves with them. Documentation helps but never fully captures tacit knowledge about system quirks, architectural decisions, and business context. The replacement (whether a new contractor or FTE) spends 2-4 weeks getting back to productive speed. For complex systems, the knowledge loss can set the team back months.
IP and Security Concerns
$2,000-$5,000/yearContractors require separate IP assignment agreements, may need restricted system access, and create data handling complications for companies with SOC 2 or similar compliance requirements. Legal review of contractor agreements, access provisioning, and audit compliance add administrative overhead.
Worker Misclassification Risk
Potentially catastrophicThe IRS has increased enforcement of worker classification rules. Misclassifying employees as contractors triggers penalties ($50/form for intentional misclassification), back employment taxes, and potential lawsuits. Companies that heavily rely on long-term contractors who work exclusively for them are at highest risk. Legal counsel for classification review costs $2,000-$5,000 but is essential.
The Hybrid Model
The most cost-effective approach for most growing tech companies is a hybrid model: maintain a core team of full-time employees who own institutional knowledge, architecture decisions, and team culture, while using contractors for surge capacity, specialised skills, and exploratory projects. The optimal ratio depends on your growth rate and hiring volatility, but a common pattern is 70-80% FTE / 20-30% contractors.
The hybrid model also creates a natural contractor-to-hire pipeline. Contractors who perform well and want full-time employment can convert after 3-6 months, giving you a pre-vetted candidate with zero recruitment cost beyond the conversion fee. Companies using this approach report 85-90% conversion success rates compared to 74-82% for direct hires, because the 3-6 month working trial provides far more signal than any interview process.
Related Resources
Frequently Asked Questions
Is it cheaper to hire a contractor or full-time developer?
It depends on duration. A US contractor at $100/hour costs $208,000/year versus a full-time developer at $150K salary plus 35% benefits ($202,500). For projects under 8 months, contractors are typically cheaper because you avoid recruitment costs and benefits. For ongoing roles lasting 14+ months, full-time employees become more cost-effective. The break-even point is typically 8-14 months depending on the benefits package.
What is the break-even point between contractor and full-time?
The break-even point for a $100/hr contractor versus a $150K FTE (with 35% benefits) is approximately 10-12 months. In Year 1, the FTE costs more due to one-time recruitment ($15K-$30K) and onboarding costs. By Month 10-12, cumulative FTE costs cross below cumulative contractor costs. By Year 2, the FTE saves $40,000-$60,000 annually because recruitment costs are not repeated.
What are the hidden costs of contractors?
Hidden contractor costs include: management overhead (20-30% more management time than FTEs), knowledge transfer risk ($10K-$30K in documentation and transition when contracts end), IP concerns (contractor work ownership requires explicit contract provisions), worker misclassification risk (IRS penalties of $50/form + back taxes), limited team integration (reduced collaboration and institutional knowledge), and repeated onboarding costs for contractor turnover.
What are typical contractor-to-hire conversion fees?
Conversion fees range from $5,000 to $15,000 or 10-20% of annual salary. Some staffing firms waive the conversion fee after 6+ months of contractor engagement. Negotiate conversion terms upfront before the contractor starts -- retroactive negotiation gives the staffing firm significant leverage. Also verify that the contractor's agreement with the staffing firm does not include non-compete clauses that prevent conversion.