Labour arbitrage: how much of the BPO saving is wage rates?

Key takeaways

Labour arbitrage is the saving a business makes by having work done where skilled labour costs less. It is the best-known reason BPO lowers costs, but it is rarely the whole saving. In our illustrative example it accounts for about four-fifths of the gross saving. The rest comes from a better method, and that part does not erode.

• Labour arbitrage is the gap between wage costs in two locations.
• £9–£18 per hour offshore against £16.27 or more per worked hour in the UK.
• About four-fifths of the gross saving in our worked example.
• Wage gaps narrow over time, so process gains must follow.

What is labour arbitrage?

Labour arbitrage is the practice of sourcing work from a location where equivalent skills cost less, and keeping the difference. In outsourcing it usually means a UK business buying customer service, administration or technical work from a team in a lower-cost country such as Sri Lanka, India or the Philippines.

The saving exists because living costs and wage levels differ between countries, not because the people are less able. A graduate in Colombo and a graduate in Leeds can do the same documented task to the same standard.

• How BPO can help businesses reduce operational costs
• Outsourcing to Sri Lanka from the UK

How big is the wage gap for a UK business?

The gap is narrower than headline salary comparisons suggest, because a provider's rate includes far more than a wage. As indicative market ranges, a managed offshore team costs UK businesses £9–£18 per hour, including supervision, cover, premises and tools. A UK employee on the 2026/27 National Living Wage costs about £16.27 per worked hour before any of those are added.

For a £30,000 role at about £19.81 per worked hour, an offshore rate of £12 is a gap of roughly 39%. Against a National Living Wage role, the same rate is a gap of about 26%. Neither figure is a GBL price.

• BPO cost per hour in the UK
• The true cost of an employee in the UK

How much of a BPO saving comes from arbitrage?

In our illustrative pillar example, 70 hours a week of routine work costs about £72,100 a year in-house at £19.81 per worked hour. Buying the same 70 hours at £12 would cost £43,680, a rate saving of about £28,400. Standardising the work so it takes 60 hours saves a further £6,240.

So roughly 82% of the gross saving is arbitrage and 18% is method. Where in-house staff are under-used or senior people do the work, the share from arbitrage is smaller and the share from utilisation and overhead is larger.

• Rate saving: about £28,400 a year.
• Method saving: about £6,240 a year.
• Arbitrage share of the gross saving: about 82%.

• How much can a small business save by outsourcing?
• The cost lever scorecard: find savings process by process

Where does labour arbitrage stop working?

Labour arbitrage stops working when the lower rate is cancelled by lower output per hour, more rework or more of your own time. It also weakens as wages in outsourcing locations rise, as exchange rates move, and as simple tasks are automated. A saving built on rate alone tends to shrink every year.

• Productivity: fewer tasks completed per hour.
• Quality: corrections and repeat contacts.
• Oversight: more review time than planned.
• Currency and wage inflation at the provider's location.

• Why outsourcing sometimes fails to save money
• Currency risk in offshore outsourcing, and who carries it
• Indexation clauses: how outsourcing prices rise each year

Is labour arbitrage ethical?

Labour arbitrage is ethical when the people doing the work are paid well by local standards, employed lawfully and treated properly. Outsourced roles in established BPO centres are often sought-after professional jobs. The risk lies with providers who compete on rate alone and recover the margin from their staff.

Ask a provider how pay compares with the local market, what staff turnover is, and what their policy on working hours and overtime says. UK businesses above the statutory turnover threshold also have modern slavery reporting duties that extend to their supply chains.

• Cost-effective or just cheap? How to judge outsourcing value
• False economy in business: when the cheap option costs more

How do you make an arbitrage saving last?

Make the saving last by adding process gains on top of the rate. Use the first year to stabilise and document. Use the second to remove steps, cut rework and automate the simplest tasks. A provider that only ever offers a rate has nothing else to give when the gap narrows.

• Continuous improvement in outsourcing: savings past year one
• Economies of scale in outsourcing: why providers cost less
• Process standardisation: one best way, lower cost per task

What does this look like in practice?

A pattern we see in firms that outsourced for price: the first year looks excellent, the second looks flat, and by the third the provider's annual increase has eaten a noticeable share of the gain. The firms that keep their saving are the ones that asked for a process improvement plan from the start.

• See client work
• BPO Solutions for UK businesses

Labour arbitrage checklist

Check these points before you rely on a rate saving.

• Compare loaded UK cost per worked hour with the managed rate.
• Confirm what the rate includes: supervision, cover, tools.
• Measure tasks completed per hour, not just hours.
• Ask how the rate will change each year.
• Ask who carries exchange rate movement.
• Ask how staff pay compares with the local market.

• How to compare outsourcing quotes like for like
• BPO contract terms to check before signing

Next step

Send us the roles and hours you are considering. We will show you how much of the likely saving is rate, how much is process, and what would protect each.