Contractor vs. FTE: Total cost of ownership

Key takeaways

• The contractor vs. FTE cost comparison runs on all-in contractor cost versus all-in FTE cost, not on hourly rate versus base salary. Both numbers require explicit calculation.
• For engagements under twelve months, contractors are almost always less expensive on a total cost basis, even when the hourly rate looks high.
• The hidden costs that favor contractors: no recruiting fee, no onboarding overhead, no severance, no benefits administration, no equity dilution.
• The hidden costs that favor FTEs: no platform fee or agency margin, deeper institutional knowledge over time, lower ongoing coordination cost as tenure grows.
• Conversion fees, charged by talent platforms if you hire a contractor directly as an FTE, are a material cost that should be factored into the initial engagement decision.

How much does it cost to hire a software developer in 2026?

As of September 2026, a US software developer costs roughly $95,000 to $135,000 a year fully loaded at the junior level, $190,000 to $250,000 at senior, and $255,000 to $340,000 and up at staff or principal. The same person engaged as a contractor runs $30 to $60 an hour junior, $100 to $180 senior, and $130 to $190 at the architect tier once an agency's markup is on the bill. The table puts the three ways of paying for the same level side by side.

Where each row comes from. FTE base and loaded figures are KORE1's 2026 cost-to-hire table (July 2026), which loads base with payroll tax, benefits and equipment at the 30 to 40% the BLS Employer Costs series supports. Arc's May 2026 comparison runs higher on base (junior $90,000 to $125,000, senior $180,000 to $240,000, staff $250,000 to $400,000 and up) because its sample skews to the coastal metros; use it as the ceiling. Independent contractor bands are Arc's freelance rates from the same piece (junior $30 to $60, mid $60 to $110, senior $100 to $180). The agency column uses the 35 to 50% markup on the contractor's pay rate that KORE1 states as the IT staffing norm; the senior and staff bill rates are the ones KORE1 publishes for W-2 placements (senior $75 to $110 pay, $108 to $160 bill; architect $90 to $130 pay, $130 to $190 bill). The junior agency figure is computed from Arc's band because neither source publishes a junior bill rate.

Two things the table hides. An agency bill rate sits below a direct senior rate at the top of the band because the agency's contractor is a W-2 employee taking a pay rate, and the independent contractor prices in their own taxes, benefits and bench time. And the staff contractor column is the least reliable number on the page: the public marketplaces stop reporting at "senior", so the band is Arc's senior ceiling extended by the architect premium in KORE1's data. Treat it as a range to test quotes against rather than a benchmark. For national context, the BLS median wage for software developers was $135,980 in May 2025 (top 10% above $214,670), and Levels.fyi shows a $195,000 median total compensation across all US levels, which is base plus equity and bonus and therefore lands above the BLS figure.

The full-time employee total cost model

Most hiring leaders compare contractor hourly rates to FTE base salary. This misses approximately 25 to 45% of the FTE's actual cost to the company.

Mandatory employer costs

Employer payroll taxes (US, 2026):

• Social Security (OASDI): 6.2% of wages up to $184,500, the 2026 Social Security wage base, so the employer's share caps at $11,439 per employee
• Medicare: 1.45% of all wages, no cap (IRS Topic 751)
• FUTA (federal unemployment): 0.6% on the first $7,000 of wages after the state credit, so $42 per employee
• State unemployment tax: 1 to 4% depending on state and company history, applied to a state wage base (from $7,000 to over $60,000 depending on the state), not to the whole salary; budget $500 to $2,000 per engineer
• Estimated total payroll tax: roughly 8 to 9% of base at a $150,000 salary. The percentage falls as salary passes the wage base. A $250,000 staff engineer costs $11,439 in Social Security plus $3,625 in Medicare, $15,064 or 6.0% of base, before unemployment tax.

Benefits (employer contribution):

• Health insurance (employer share): $6,000 to $12,000/employee/yr for individual coverage, $15,000 to $25,000 for family
• 401(k) employer match: 3 to 6% of salary at typical match rates
• Dental and vision: $500 to $1,500/yr
• Life and disability: $500 to $1,000/yr
• Estimated total benefits: $12,000 to $28,000/yr depending on plan generosity

Overhead and operational costs

Equipment and software:

• Laptop and peripherals: $1,500 to $3,000 (amortized over three years: $500 to $1,000/yr)
• Software licenses (IDE, collaboration tools, SaaS access): $1,000 to $3,000/yr
• Estimated: $1,500 to $4,000/yr

Recruiting and onboarding:

• Internal recruiter time or external agency fee: $15,000 to $40,000 per hire (agency typically 15 to 25% of first-year salary)
• Interview time across the team: 20 to 40 engineer-hours at $100 to $150/hr effective cost
• Onboarding and ramp to productivity: two to three months at 50% effectiveness
• One-time cost per hire: $20,000 to $55,000 (amortized over tenure)

Management overhead:

• Engineering manager time (performance reviews, 1:1s, career development): 15 to 25% of manager salary allocated per report
• HR and people operations: $2,000 to $5,000/yr per employee
• Estimated: $10,000 to $20,000/yr

Total FTE cost summary

For a senior engineer at $150,000 base salary:

Base salary: $150,000

Employer payroll tax: $12,500 (FICA $11,475, FUTA $42, state unemployment about $1,000)

Benefits (mid-range): $20,000

Equipment and software: $2,500

Management overhead: $15,000

Total annual cost: $200,000

Effective hourly rate (2,080 hrs): $96/hr

Recruiting and onboarding add $20,000 to $55,000 in year one, pushing year-one total cost to $220,000 to $255,000, or $106 to $123/hr effective for year one.

Most hiring leaders compare contractor hourly rates to FTE base salary. That comparison misses about a third of the FTE's actual cost.

The contractor total cost model

Contractor cost calculation is simpler, but the platform fee layer adds complexity.

Contractor direct costs

Quoted hourly rate: The rate the contractor charges per hour. This is the floor.

Platform service fee: The fee charged by the talent platform on top of the contractor's rate. Some platforms disclose it; others embed it in the developer's rate. Staffing agencies charge a similar layer: KORE1 puts the W-2 contract markup at 35 to 50% of the pay rate for IT work.

Trial period cost: Some trial periods are paid. Budget 2 to 3 weeks of contractor time as a potential trial cost if the first match doesn't work.

Conversion fee (if applicable): If you decide to hire the contractor as an FTE, most talent platforms charge a conversion fee. This typically ranges from a percentage of projected annual earnings to a flat fee in the tens of thousands. For a $150,000 salary, conversion fees commonly land between $10,000 and $50,000.

Contractor cost summary

For a senior engineer at $140/hr, 40 hours/week, 50 weeks/year (not accounting for holidays or gaps):

Contractor hourly rate (2,000 hrs): $280,000

Platform service fee (10%): $28,000

Total annual cost: $308,000

Effective hourly rate: $154/hr

At full-time, full-year utilization, the senior contractor is meaningfully more expensive than the FTE. The comparison shifts at lower utilization.

What a senior contract software engineer costs per hour

As of September 2026, a senior US contract software engineer runs $100 to $180 an hour when you engage them directly through a marketplace, and $108 to $160 an hour when a staffing agency places them as a W-2 contractor. The $140 used in the worked example above sits in the middle of both bands.

The direct band is Arc's senior freelance range (May 2026). Arc's own rate explorer shows a lower all-level picture, a $81 to $100 average and a $61 to $80 median, because it blends every region and seniority; the US senior slice sits well above it. The agency band is KORE1's published senior software engineer row: $75 to $110 pay rate, $108 to $160 bill rate, with the gap being the agency's payroll burden and margin.

The FTE equivalent for the same seniority is worth having next to those numbers. Levels.fyi's US senior software engineer median is $250,000 total compensation (25th percentile $180,000, 75th $360,000), which is $120 an hour on 2,080 hours before any of the employer costs above. Load that at the 1.25 to 1.45x this guide uses and the senior FTE lands at $150 to $175 an hour, inside the direct contractor band. The hourly gap between the two models at the senior level is narrower than most budget conversations assume; the real difference is fixed cost versus variable cost, which is what the breakeven analysis measures.

The breakeven analysis

The contractor vs. FTE cost comparison depends on three variables: utilization rate, engagement length, and whether the role will convert to FTE.

At 50% utilization (20 hours/week)

Contractor at $140/hr, 20 hours/week, 50 weeks: $140,000/yr in contractor fees + 10% platform fee = $154,000.

FTE at $150,000 base + overhead: $200,000/yr, regardless of utilization.

At 50% utilization, the contractor is clearly more cost-efficient. The FTE's overhead is fixed; the contractor's cost scales with actual work.

At 80% utilization (32 hours/week)

Contractor: $140/hr x 1,600 hrs + 10% platform fee = $246,400.

FTE: $200,000, plus year-one recruiting cost of $20,000 to $55,000.

At 80% utilization in year one, the contractor and FTE are comparable in total cost. In year two without recruiting cost, the FTE becomes less expensive.

At full utilization (40 hours/week, 50 weeks)

Contractor: $308,000/yr (as above).

FTE: $200,000/yr in year two and beyond.

At full utilization over multiple years, the FTE is significantly less expensive. The crossover to FTE cost advantage typically happens at twelve to eighteen months of sustained full-time engagement.

zoom_in

Hidden costs that aren't in either calculation

Contractor advantages (costs that FTE carries but contractor doesn't):

• Severance: zero for a contractor engagement that ends; two to six weeks of salary plus benefits for an FTE layoff
• Benefits administration overhead: HR time, compliance, broker management
• Equity and equity management: cap table complexity, 409A valuations, option pool dilution
• Long-term performance management: the cost of a bad FTE hire is higher because exit is slower

FTE advantages (costs that contractor carries but FTE doesn't):

• Institutional knowledge loss at engagement end: the FTE compounds knowledge over time; the contractor takes knowledge with them
• Coordination cost: a long-tenure FTE knows the codebase and the team; a new contractor has a ramp period
• Platform fees: no ongoing platform fee on an FTE, the recurring cost is the salary and benefits, not a fee layer

When each model wins

Use a contractor when:

• The engagement is under twelve months with defined scope
• You need a skill set for a specific project that isn't part of your long-term stack
• You're a seed or Series A company that can't absorb fixed FTE overhead
• The role requires immediate start without a two to three month recruiting cycle
• You're uncertain whether the role is a permanent function or a time-bounded project

Use an FTE when:

• The role is a permanent function with multi-year scope
• The team is large enough that deep institutional knowledge is a material productivity driver
• You're building a function that requires consistent cultural presence and management depth
• The skill set is part of your core technical identity, not a project-specific need
• You're past Series B with the budget certainty to absorb fixed headcount cost

The structural version of this decision, which treats the three models as three different products, lives in FTE vs. contractor vs. team augmentation. When the engagement starts to span multiple ICs, the relevant cost comparison shifts to individual contractors vs. managed teams.

What to do next

Run the loaded-cost math on your own numbers before you compare quotes: take the base you would offer, multiply by 1.25 and 1.45, divide by 2,080, and set that range beside the contractor rates in front of you. Then answer the utilization question honestly, because it is the one that moves the answer. Below roughly half-time, or under twelve months, the contractor is usually cheaper on total cost; at sustained full-time over several years the employee is. If you are also weighing a conversion, add the fee to the FTE side of the ledger before you decide, not after.

If the role is senior, US-based and needs to start this quarter, A.Team returns a matched shortlist within 72 hours of the scoping call, priced at one all-in rate per builder on the service order. Talk to A.Team.