Runway is a burn-rate story, not a headcount story
Founders often compare a contractor’s monthly invoice to an employee’s salary and call that the cost difference. That comparison is incomplete. Employees bring payroll taxes, benefits, equipment, recruiting amortization, and severance risk. Contractors bring higher day rates, weaker loyalty, knowledge concentration risk, and potential reclassification exposure. The right question is how each option changes months of runway and probability of hitting the next milestone.
Start with cash in bank divided by net monthly burn. Then model scenarios: hire two contractors for six months; hire one full-time engineer for twelve; mix both. The spreadsheet should show runway under base, delayed-revenue, and delayed-fundraising cases. Optimism is not a financial control.
Fully loaded employee cost
A common rule of thumb in the U.S. is that fully loaded cost sits roughly 1.25–1.4× base salary once you include employer taxes, benefits, and overhead—sometimes higher with generous health plans or equity administration. Add laptop, software seats, and onboarding time from existing staff. If a $120,000 salary becomes $160,000 fully loaded, that is the number that belongs in the runway model.
Also price management bandwidth. A new hire who needs heavy mentoring can reduce an existing senior’s output for a quarter. That opportunity cost rarely appears on payroll reports and still burns runway through slower shipping.
Contractor economics and switching costs
Contractors look cheaper until you count re-hiring, context rebuilding, and the moments when a critical person disappears mid-sprint. Price a “knowledge bus factor”: if only one contractor understands a subsystem, your true cost includes the chance of rebuilding it under deadline pressure. Prefer contractors for bounded projects with clear acceptance tests. Prefer employees when the work is ongoing core IP that must compound inside the company.
Rate shopping without scope clarity produces thrash. Write the deliverable, interface, and definition of done before negotiating price. Ambiguous scopes make every vendor look expensive.
Control, IP, and compliance
Employees generally give you tighter day-to-day control and clearer ownership of work product under standard agreements. Contractors require strong contracts: IP assignment, confidentiality, security requirements, and termination terms. Misclassification risk rises when you treat contractors like staff—fixed hours, exclusive work, deep integration into core teams. Classification mistakes can create back-tax and penalty exposure that destroys runway faster than any salary.
If your product handles sensitive data, factor security onboarding into both paths. A cheap contractor who skips your access discipline is not cheap.
A simple decision rule for early teams
Use contractors to buy speed on non-core or time-boxed work when runway is tight and the milestone is near. Convert to employees when the role is durable, the person is proven, and retaining institutional knowledge matters more than flexibility. Revisit the mix every fundraising or major product phase—not every anxious Monday.
Runway math rewards honesty about fully loaded costs and about how much coordination tax your team can absorb. Headcount theater does not ship product. Clear models do.
Milestone mapping beats vibes-based hiring
Translate the next business milestone into staffing needs with dates: launch date, enterprise security review, revenue target, or fundraising metrics. Ask which roles gate that milestone and whether the work is temporary scaffolding or permanent capability. Temporary scaffolding favors contractors with crisp statements of work. Permanent capability favors employees who will still be present when the next milestone appears.
Create two budgets: cash burn and attention burn. Attention burn is founder and senior-engineer time spent managing, reviewing, and unblocking. A cheap contractor who consumes half of a founder’s week can be the most expensive line item on the P&L in disguise.
Equity, retention, and the twelve-month view
Employees typically receive equity that aligns them with multi-year outcomes; contractors usually do not. If the role’s value compounds—brand voice, core architecture, customer relationships—equity plus salary can be cheaper than endlessly rebuying the same expertise at agency rates. Model twelve months, not four weeks. Many “temporary” contractor engagements quietly become permanent at a premium.
Conversely, do not grant employee-shaped commitments for exploratory work you might kill after a sprint. Optionality has value when strategy is still being discovered.
A hiring scorecard for the leadership team
Score each open need on durability, IP sensitivity, ramp time, and availability of contractor talent. High durability plus high IP sensitivity pushes toward employment. Low durability plus clear deliverables pushes toward contractors. Mixed scores deserve a time-boxed contractor trial with an explicit convert-or-end date. Write the date down. Calendar it. Ambiguous trials become accidental dependencies.
Revisit runway after every accepted offer. Headcount decisions are capital allocation decisions. Treat them with the same seriousness you would bring to a large cloud contract or a lease.