The True-Up Cost Methodology
Two providers quoting the same monthly rate can differ by a wide margin in what they actually cost you over twelve months. This is how to model the real number before you commit to it.
The short answer. A quoted rate covers base compensation and whatever else a provider chooses to bundle. True-up cost adds every category that reliably appears later: benefits and statutory contributions, attrition backfill, facilities and IT overhead, and compliance risk. The result is a single all-in figure that is genuinely comparable against in-house hiring or another provider, and that still holds twelve months after approval.
The most common way a capability center business case fails is not that the center underperformed. It is that the number presented at approval was not the number that arrived. Nobody was necessarily deceived. The quote answered a narrower question than the business case assumed it did.
Rate cards are not designed to be comparable. Two providers can bundle facilities, benefits and backfill in entirely different ways and both quote honestly, while producing very different twelve month costs. Comparing the headline figures tells you almost nothing.
This guide covers the four cost categories that sit outside a typical quote, how to build a figure that survives finance review, and how to present it so the board conversation moves from is this cheaper to is this worth it.
Four costs that sit outside the quote
None of these are unusual or hidden in a sinister sense. They are simply outside what a rate card describes.
Benefits and statutory contributions
Everything beyond base compensation: statutory contributions, insurance, leave provisioning and mandated benefits. These vary meaningfully by structure and are routinely underestimated when modelling from a salary figure.
Attrition and backfill
The cost of re-hiring and re-ramping when a role turns over, including the productivity gap while the replacement ramps. Never present in a headline rate, and entirely predictable in aggregate.
Facilities and IT overhead
Workspace, secure infrastructure, devices and local IT support. Sometimes bundled, sometimes not, and the difference between two quotes is frequently here rather than in the rate.
Compliance exposure
The cost of getting entity setup, labour law or tax registration wrong. Low probability with a mature partner, high impact without one, and capable of exceeding any saving on the rate.
Share of true twelve month cost by category
Illustrative proportions to show structure, not a quotation. Actual shares vary by role seniority, location and engagement design.
Why rate cards mislead
The quoted portion is the majority, not the whole
Because base compensation dominates, a rate card feels close enough to the truth. The remainder is large enough to change a decision and small enough to be dismissed.
Bundling differences are invisible in a rate
One provider including facilities and another excluding them produces two honest quotes that are not comparable in any useful sense.
Attrition is predictable in aggregate
Any individual departure is unpredictable. The annual rate is not, which means backfill belongs in the model rather than in the risk register.
Smaller centers have less room to absorb variance
With a large captive center, unmodelled costs average out across hundreds of people. With a Nano GCC there is far less to average against.
How to build the number
Four steps. The output is a single all-in annual figure per role, and a total that finance can defend.
Establish the mandate and team shape
Cost follows composition. Model the specific roles and seniorities the mandate requires rather than an average blended rate, which conceals exactly the variation that matters.
Add the four categories to each role
Layer benefits and statutory contributions, facilities and IT, and an attrition backfill provision onto base compensation for every role in the team.
Price the compliance position
Confirm who carries entity, payroll and labour law responsibility and what that costs. If the answer is your organisation, that internal effort belongs in the model too.
Compare against a like-for-like alternative
Model the in-house or agency alternative on the same all-in basis. Comparing an offshore all-in figure against a domestic base salary is the single most common modelling error.
Turning a cost model into a board case
A cost model on its own answers whether something is cheaper. Boards fund things that are worth it, which is a different question requiring the other half of the picture.
Pair the all-in figure with expected outcomes from the Value Generation Framework, and with a realistic timeline from the GCC Launch Roadmap. Cost, value and time together constitute a case; cost alone constitutes a quote.
The practical test of a good model is whether it still looks correct in twelve months. A model that requires explanation at the first quarterly review was not conservative enough at approval.
- One all-in figure per role, not a blended average
- Both sides of the comparison modelled identically
- Attrition provision included as a line, not a footnote
- Paired with expected value and a realistic timeline
We quote the number that arrives
We model all four categories up front, including attrition backfill, because a quote that omits them transfers a known cost to you as an unknown one. That is not a commercial advantage worth having.
If a competing quote looks materially lower, the useful question is which categories it includes. Frequently the gap is entirely explained by what is not in the number rather than by anything about the team.
- All-in modelling before you commit, not after
- Attrition backfill carried as part of the engagement
- Entity, payroll and compliance carried by us
- Modelled per role and seniority, not blended
The quote we almost accepted was eleven percent cheaper. It also excluded facilities and had no backfill provision. On a like for like basis it was the more expensive option.
Questions about GCC cost modelling
What is the True-Up Cost Methodology?
A method for calculating the real all-in cost of a capability center by adding benefits and statutory contributions, attrition backfill, facilities and IT, and compliance to the quoted base rate.
Why do offshore quotes end up higher than expected?
Because headline rates typically cover base compensation only. Benefits, facilities, backfill and compliance are real recurring costs that arrive regardless of whether they were quoted.
What is a true-up cost calculator?
A model that takes a quoted rate and layers every real cost category onto it, producing one comparable all-in figure per role that can be set against in-house or agency alternatives.
How should we compare offshore against hiring in the US?
On a fully loaded basis for both. A US hire includes benefits, equity, recruiting cost and the opportunity cost of a vacant seat; the offshore side must include benefits, facilities, backfill and compliance.
Is attrition really a modellable cost?
Yes. Individual departures are unpredictable; annual rates are not. Treating backfill as a budgeted line rather than a risk is what keeps a model accurate in year two.
Do two quotes at the same rate cost the same?
Frequently not. Bundling differences in facilities, benefits and backfill can produce materially different twelve month costs from identical headline rates.
How does this fit into a board business case?
It provides the cost side. Pair it with expected outcomes from the Value Generation Framework and a realistic launch timeline so the board is evaluating worth rather than only price.
What should we ask a provider directly?
Ask for an all-in annual figure per role, and ask explicitly which of the four categories are included. An unwillingness or inability to produce that number is itself informative.
Continue reading
Deeper reading on cost and business case construction.
What identical rate cards can conceal
Two illustrative providers quoting the same headline monthly rate for the same role. The structure, not the rate, decides the twelve month cost.
| Cost element | Provider A, all-in quote | Provider B, rate card quote |
|---|---|---|
| Base compensation | Included | Included |
| Benefits and statutory contributions | Included | Billed separately |
| Workspace and facilities | Included | Client arranges |
| Devices, secure cloud and IT support | Included | Billed separately |
| Attrition backfill and re-ramp | Carried by provider | Client absorbs |
| Entity, payroll and labour law compliance | Carried by provider | Client carries |
| Headline monthly rate | Same | Same |
| Realistic twelve month cost | Predictable | Materially higher |
Illustrative structure rather than a quotation. The point is that comparing headline rates answers a question you did not intend to ask.
Six questions to ask any provider
The answers are usually more informative than the quote itself.
What is the all-in annual cost per role?
A provider able to produce this quickly has modelled their own economics. One that cannot has transferred that uncertainty to you.
Who carries attrition backfill?
If the answer is the client, that is a real recurring cost that belongs in your model rather than in a risk register.
What is bundled in facilities and IT?
The most common source of apparent price differences between otherwise similar quotes.
Who is the legal employer of record?
This determines who carries labour law, tax and termination obligations, and it is not always the party issuing the invoice.
How is IP assigned, and when?
Assignment should be outright to your entity and contractual before the first engineer starts, not addressed later.
What does the ramp cost?
A team is not productive on day one. Ask what the first ninety days are expected to produce and what they cost.
When each cost category actually appears
Part of why rate card comparisons feel accurate early and stop being accurate later.
Base and setup costs only
The quoted rate is broadly the experienced cost. This is the period during which a rate card comparison appears to have been correct.
Facilities, IT and ramp become visible
Infrastructure and device costs land, and the productivity gap during ramp becomes measurable. Models that assumed day one productivity begin to diverge.
Statutory and benefits cycles land
Contribution cycles, insurance and leave provisioning appear in full. For teams modelled from base salary alone, this is usually the first material surprise.
First attrition and backfill
The first departures occur and backfill cost plus re-ramp arrives. For an unmodelled team this is where the twelve month figure separates decisively from the quote.
What a finished model contains
Three artefacts. Together they constitute a business case rather than a quotation.
Two numbers to insist on
If a provider can produce both quickly, they have modelled their own economics. If not, that uncertainty is being transferred to you.
Want the number that will actually arrive?
Tell us the mandate and we will model the all in cost per role, including attrition backfill and compliance, in a format your finance team can review.