Free GTM Tool
Agency, in-house, or fractional is not one decision. It is a different decision for every function, because how much an agency can deliver depends on how much of the work relies on knowledge that only exists inside your company. Pick up to three functions and see where each one lands, on speed first, then cost.
Choose up to three. Hover any card for what the function covers. Comparing them separately is the point, because a company often should hire in-house for one function and use an agency for another.
Duration of need flips the answer more often than salary does, and it is the input most comparisons leave out.
Context dependency sets the ceiling an agency can reach on that discipline. These are my starting benchmarks for B2B software, drawn from building and staffing these functions. Everything is editable, and the model recalculates as you change it.
| Function | Context dep. | Agency ceiling | Salary | Retainer /mo | Fractional /mo | Days/wk |
|---|
Before cost, because this is what usually decides it. The hatched portion is dead time producing nothing. The solid portion is the climb to full productivity.
Fully loaded. In-house includes recruiting, benefits, tooling, search-period cost, and any backfill. Agency includes retainer plus internal management time.
| Function | In-house | Agency | Fractional | Lowest |
|---|
Total cost divided by FTE-equivalent output delivered. This reorders the ranking, because agency and fractional both deliver less than one full FTE of work.
| Function | In-house | Agency | Fractional | Best value |
|---|
Cumulative cost per unit of output across 36 months. Where the in-house line drops below the others is the month hiring starts paying back.
Weighted across speed, cost, context fit, continuity, and bandwidth. Cost is one input, not the verdict.
Questions
It depends far more on the discipline and how long you need the work than on cost. Low context disciplines like paid media, SEO, and creative suit agencies well, because the work is executional and agencies bring real tool and portfolio leverage. High context disciplines like product marketing, marketing operations, and ABM lose most of their value in an agency, because they depend on internal product, customer, and systems knowledge that cannot be briefed in. If the need is under twelve months, in-house rarely pays back the recruiting fee and ramp.
Base salary is roughly two thirds of the real number. Fully loaded cost adds benefits and payroll burden at about 1.25 to 1.4 times base, a recruiting fee of 20 to 25 percent of first year base, eight to sixteen weeks of search producing zero output, a ramp where the hire is 40 percent effective in month one and reaches full productivity around month four to six, tooling and seats, and management overhead. Over three years most teams also absorb one backfill, since median B2B marketing tenure runs under two years.
For most mid-level disciplines the break-even sits between month fourteen and month eighteen on a cost per productive month basis. The exact month moves with salary, retainer size, and how much output the agency can actually deliver given the context the discipline requires. For low context work like paid media, in-house sometimes never overtakes agency, because the agency ceiling is near full productivity and the leverage is real.
Fractional is strongest where the motion has not been defined yet. It gives you senior judgment in one to two weeks with no recruiting fee, no benefits load, and a cancellable commitment. The trade-off is a bandwidth ceiling, since two days a week is roughly 40 percent of an FTE's capacity, and key person risk. It is the right instrument for defining strategy, fixing a broken motion, or bridging a leadership gap, and the wrong one for sustained high volume execution.
Because the ceiling an agency can reach depends on how much internal context the work requires. A paid media agency can operate at roughly 95 percent of what an in-house hire would deliver. A product marketing agency tops out closer to 50 percent, because positioning, competitive intelligence, and customer insight depend on access and accumulated context rather than craft alone. Comparing one blended marketing function hides this, which is why the same company often should hire for one discipline and outsource another.
Duration of need is the input that flips the answer most often, and the one most comparisons omit. Under twelve months you generally never clear the recruiting fee and ramp, so fractional or agency wins on almost any discipline. Between twelve and twenty four months it becomes a genuine question that turns on context dependency. Beyond twenty four months, in-house wins for high context disciplines and stays competitive everywhere except the most executional work.
Yes. No signup, no email gate, no account. Nothing is stored and nothing is sent anywhere. Every assumption including the context dependency benchmark is editable, and the full model exports to an Excel workbook with live formulas.
Five tabs with live formulas, so you can change an assumption in the workbook and everything recalculates.
This tells you which model fits each discipline. It does not tell you whether the roles you are staffing are the ones your GTM motion actually needs. That is what the diagnostic is for.