In-house vs staff augmentation: cost comparison

What a complete comparison includes

• A salary and a provider's monthly figure are not the same kind of number, and putting them side by side produces an answer that is wrong before the arithmetic starts.
• Management time, ramp and turnover show up on no invoice and decide the answer more often than any rate difference does.
• 3 years is the honest horizon. Most one-year comparisons flatter whichever option the person building the model already preferred.

Finance asks which option costs less and receives two figures that measure different things. One is an offer letter. The other is a monthly amount covering the salary plus most of what a company would otherwise do for itself. Set them side by side and the conclusion comes out wrong, usually in whichever direction the modeller was already leaning.

IT staff augmentation services get compared to direct hiring on one line item, and the comparison collapses the moment someone asks what each figure includes. Both sides can be rebuilt so they measure the same thing. The exercise takes an afternoon and survives a board meeting.

The offer letter is about half the story

Salary is the visible part. Around it sit employer taxes, statutory benefits, paid leave, equipment, software licences, whatever the company spends on office or remote setup, and the recruiting spend that got the person through the door. Most finance teams model all of it. None of this argues for IT staff augmentation services on its own; it argues for counting the same things on both sides.

What gets left out is the loaded cost of the hiring process itself. Engineering hours spent screening come out of delivery, not an HR budget, and a senior search can absorb a week of a lead engineer's time before anyone signs. Then there's the empty seat, which belongs on the in-house side of any comparison claiming to be complete.

What a provider's single figure already contains

One amount per engineer per month, covering salary, employer taxes, statutory benefits and the provider's own cost of finding and employing the person. IT staff augmentation services fold the search into that figure, which is exactly why the comparison misleads people. The recruiting line disappears from view instead of going to zero.

Ask what sits outside the number. Equipment, software licences, travel and the cost of a replacement differ between contracts (equipment is the one clients forget most often, of all things). Get them in writing first, because a figure that looks 10% lower and excludes hardware isn't lower.

The lines that appear on no invoice

Management time is one. Somebody directs the work, reviews the code and answers questions in the first month, and that hour costs the same whoever employs the engineer. Buyers who expect staff augmentation services to absorb it are modelling a different product.

Ramp is another, and it's symmetrical. A new engineer is below full output for weeks whichever route they arrived by, and pricing one side with a ramp and the other without building a model that proves what it was designed to prove.

Turnover is the expensive one. Every departure resets the ramp, hands the next person unfamiliar context, and taxes the manager who now onboards instead of shipping. Across the 500 and more placements we've run, this is the line that separates an engagement that was cheap from one that only looked cheap on the first invoice.

Where offshore staffing services change the arithmetic

Offshore staffing services move the salary line, and that's the part every model captures. They also move the availability line, which almost none of them do. A role that sits open for months in one labour market can fill in weeks in another, and those months belong in the comparison even though no invoice records them.

Costs move the other way too. Offshore staffing services carry overlap hours, occasional travel and the management attention a distributed team needs in its first quarter. A local hire down the corridor needs none of that. A model that banks the salary saving and ignores those is as incomplete as one that counts only the offer letter. Both errors are common and point in opposite directions, which is how two teams reach opposite conclusions from the same inputs.

The assumptions doing the real work

Horizon is the commonest error. A one-year model makes direct hiring look expensive, because recruiting spend and the empty seat land in year one and never repeat. Run the same numbers over 3 years and the picture shifts. Agree on the horizon before anyone opens a spreadsheet.

The subtler one is scale. A team compares the cost of one engineer and then buys 5, without asking whether its own management capacity scales the same way. 5 engineers arriving through staff augmentation services need the same direction that 5 direct hires would, and the cost of that direction is the line most often left at zero.

Building a comparison you can defend

Put both options on the same basis: total cost per engineer, over 3 years, with recruiting, taxes, benefits, equipment, ramp and one assumed departure priced on each side. State the turnover assumption out loud. It moves the result more than any difference in the headline figures.

Then ask the question the spreadsheet can't answer. Whether the role belongs permanently inside the company, or whether it's capacity you want to be able to stop paying for. A permanent role at the centre of the product is worth the slower, costlier search. For the rest, IT staff augmentation services and offshore staffing services exist to buy back the months a local search would have spent.

FAQ: comparing the two on cost

Is direct hiring always more expensive?

No. Over a long horizon, in a market where the role fills quickly and the person stays for years, a direct hire is often the cheaper answer. The advantage narrows the longer a search runs, which is the window IT staff augmentation services are built for, and reverses entirely if the seat stays empty.

How do we price the cost of an unfilled role?

Value it the way you value any other delayed work. A rough figure stated openly beats leaving the line at zero, and zero is the default in most models we're shown.

What should we assume about turnover?

Ask each provider for its own retention figure, broken down by role, and use that rather than a market average. For the in-house side, use your own history. If neither number exists, the comparison is guesswork with decimal places.

Do offshore staffing services always cost less?

On salary, usually. On total cost, only once overlap hours, travel and the extra management attention of a distributed team are included and still leave a gap. At senior level the case for offshore staffing services rests on availability more than price, since scarce people are expensive in every market.

How do IT staff augmentation services handle pay rises?

Through a review mechanism written into the contract, and the terms vary widely. Some index to a market benchmark, some renegotiate annually, some leave it undefined. Undefined is the one to avoid.

Can we move an engineer in house later, and what does that cost?

Usually yes, under a conversion clause agreed at the start. Price it into the model at the outset: a fee you'd accept today looks different 18 months in, once the engineer knows the system.