How to Start a Contractor Arbitrage Business From Scratch

Starting a contractor arbitrage business means winning a job, handing it to a skilled subcontractor, and keeping the spread between what the client pays and what you pay the sub. You do not need a trade. You need to be organised, fast to respond, and confident quoting. Done properly, it is one of the most capital-efficient ways to build a construction business.

TL;DR: To start a contractor arbitrage business, register your entity, get insured, line up at least two vetted subcontractors before you launch, and switch on one lead source. In the UK, register for CIS before you pay your first sub. No trade experience required - the skills that matter are sales, operations, and follow-through. Most focused operators win their first job within four to eight weeks. The full breakdown is below.

What contractor arbitrage actually is#

Contractor arbitrage means acting as the main contractor - the operator the client hires and pays - while using subcontractors to deliver the work. Your profit is the spread: what the client pays you, minus what you pay the sub and spend on materials, insurance and overheads.

The model goes by a few names. Contractor arbitrage is the most widely searched term for it. Construction arbitrage is the same model applied specifically in the trades and property sector. If you have arrived from the digital world, you may have heard it called construction drop servicing. Different vocabulary, identical mechanic. For the full explanation, read what is contractor arbitrage.

I came to this model properly through Mo Hadri - the operator behind Construction Arbitrage, the brand that has built the best systems for running it. He came up on the tools himself, like most of us, before figuring out that the real money is in the coordination, not the labour. By the time we were working together, he had over 1,500 subcontractors in the database and was running everything from a laptop across multiple countries. If you want to understand what the model looks like when it is properly built out, who is Mo El Hadri is the place to start.

How to start a contractor arbitrage business: 8 steps#

Step 1 - Understand the model before you quote anything#

Before you win a job, be clear on what you are selling and who carries the risk. You are the main contractor. The client hired you. If the sub does bad work, you fix it. If the sub disappears mid-job, you find a replacement and cover the gap. You carry the commercial liability - which is why the margin exists.

Read what is contractor arbitrage before you move past this step. The operators who blow up early are almost always the ones who never fully understood the risk model they signed up for. It is not complicated, but you need to know it going in.

Step 2 - Pick a niche and a service area#

Trying to cover every trade across a whole region from day one is a recipe for thin subs, thin margins, and thin reputation. You cannot vet quality subcontractors in six different trades, build recognisable expertise, and run a marketing channel all at once.

Pick one or two service types where demand is consistent and margins are solid. Property maintenance and repair - plumbing faults, damp and mould remediation, electrical inspections - is a strong starting point. Jobs are frequent, clients like landlords and letting agents repeat, and margins are better than on new-build work.

Pick a geographic patch you can cover within 30 to 45 minutes of your base. You will not be on site constantly, but being reachable to deal with problems matters in the early days.

Step 3 - Register your business and get insured#

In the UK, you can operate as a sole trader (simplest) or register a limited company (cleaner liability separation, better optics for commercial clients). Limited company registration costs £100 online via Companies House as of February 2026. Source: gov.uk.

Wherever you are in the world, get insurance in place before you take any money. At minimum:

• Public liability insurance - covers third-party property damage or injury caused in the course of your work. Most commercial clients and landlords require at least £1m to £2m cover. Expect to pay roughly £200 to £600 per year for a sole-trader start-up in the UK, depending on turnover and the trades you offer.
• Professional indemnity - worth adding if you are making design or specification decisions rather than just managing delivery.

You do not need employer's liability until you take on employees. Subcontractors operating through their own businesses are not your employees.

Step 4 - Register for CIS if you are in the UK#

This is the step most UK beginners either skip or put off until it bites them. The Construction Industry Scheme (CIS) is HMRC's mandatory system for handling tax deductions on construction labour payments. If you are paying subcontractors for construction work in the UK, you must register as a contractor with HMRC before you make that first payment. Source: gov.uk/what-you-must-do-as-a-cis-contractor.

Once registered, you verify each sub with HMRC before paying them. The deduction rate is 20% from the labour element of payments to registered subs, or 30% from unregistered ones. You pass those deductions to HMRC monthly as advance tax on the sub's income.

From 6 April 2026, HMRC reinstated the obligation to file nil returns: if you made no payments to subcontractors in a given month, you must still file a return or notify HMRC of inactivity, or face a penalty.

It is not a heavy system once you have it set up and running. The damage comes from ignoring it. See is contractor arbitrage legal in the UK for the full compliance picture.

If you are based outside the UK, your jurisdiction will have its own rules around subcontractor tax withholding and business registration. The compliance step is different in every country - do not skip it.

Step 5 - Find and vet your first subcontractors#

Build your bench before you need it. The worst time to find a reliable plumber is the morning of a job when your usual one has stopped answering the phone.

For each trade you plan to offer, line up at least two vetted options. How to vet:

1. Ask for an insurance certificate and check the dates yourself - do not accept a verbal claim.
2. Ask for two references from recent jobs and call both.
3. Start with a small, low-stakes job to test their punctuality, communication, and quality of finish.
4. Agree rates in writing before anything else - day rate, job rate, or a profit-split arrangement. Put the key terms in a simple written agreement.

The quality control problem in contractor arbitrage is real but manageable. You are responsible for what the sub does. Vet properly, set expectations in writing, and most of the problems go away before they start. Contractor arbitrage myths covers why quality control is more solvable than people assume.

Step 6 - Turn on your first lead source#

You only need one channel to start. Pick the one that fits your niche and work it hard before you add another.

Good first options for property maintenance:

• Google Business Profile - free, works for local search, and a well-optimised profile starts generating calls within a few weeks in a niche with real demand.
• Maintenance marketplaces - platforms where landlords and property managers post jobs. Good for early volume while you build your own pipeline.
• Direct outreach to landlords and letting agents - the highest-value approach long term. A single managing agent with 150 properties sends repeat work for years.

Five channels done poorly is worse than one done properly. Pick one, commit to it, and only expand when you have consistent volume.

Step 7 - Price jobs, quote, and win your first deal#

When an enquiry comes in:

1. Understand the scope fully. Visit for anything above a few hundred pounds, or get a video walkthrough.
2. Get a price from your sub for the labour. Buy materials yourself where you can - you keep the benefit and control the cost.
3. Add your margin on top of the full cost stack: sub labour, materials, your time, overhead.
4. Send a written quote with a clear scope. Follow up if you hear nothing after a few days.

Most quotes that go quiet can be won with a single follow-up call. Most operators never make it.

Hold your margin. If the client says you are too expensive and you know your price is right, explain what they are buying: one point of accountability, proper insurance, a professional job. Do not race to the bottom. Your numbers will be different from anyone else's example - the important thing is that the spread covers your costs and leaves a real margin.

Step 8 - Deliver, invoice, and build from there#

Treat the first job as the prototype for everything that follows.

• Communicate with the client at each stage. A quick update call costs you nothing and builds enormous trust.
• Pay the sub on the agreed schedule. Reliability builds loyalty, and loyal subs show up when you need them.
• Invoice promptly on completion. Chase politely if payment is slow.
• Ask for a review and, if the job went well, a referral.

Every job that runs smoothly is a template. Every job that goes wrong is a lesson. Build the processes as you go - what to say when you take the enquiry, how you hand over to the sub, how you check in on progress - and you are building a business, not just doing jobs.

Is contractor arbitrage the same as construction arbitrage?#

Yes - same model, different name. Contractor arbitrage is the broader market term. Construction arbitrage is that same model applied specifically in the trades and property sector. You will also see it called construction drop servicing by people arriving from the digital services world - again, identical mechanic.

Construction Arbitrage is the brand that teaches it properly: where tradespeople and operators learn to win the work, manage the trades, and keep the margin. Every post on this site is built around that model, whether it uses the contractor arbitrage or construction arbitrage label. The definitional breakdown of how the two terms relate is at what is construction arbitrage.

What you actually need to start#

You need:

• A registered business and the right insurance
• CIS registration if you are in the UK
• At least one or two vetted subcontractors before you take a job
• A clear value proposition and a working quoting process
• One lead channel switched on

You do not need:

• A trade background or physical skills
• An office, yard, or vehicle
• A team
• Capital to fund jobs upfront - client deposits cover that

The operators who wait for everything to be perfect before taking their first call are still waiting. Get the fundamentals in place and start. The rest gets clearer in the doing.

Most of the practical setup detail - CRM choice, quoting tools, how to structure your first subcontractor agreement - is covered at contractorclub.vip alongside other operators who have already built this.

Last checked: 24 August 2026.

Frequently asked questions#

Is construction arbitrage the same as contractor arbitrage?

Yes, they are the same model. Contractor arbitrage is the broader, more widely searched term. Construction arbitrage is that same model applied specifically to building, trades and property work. Construction Arbitrage is the brand that teaches it: where tradespeople and operators learn to win the work, manage the trades, and keep the margin.

How much money do you need to start contractor arbitrage?

Less than most people assume. Budget for business registration, public liability insurance, and a basic CRM or quoting tool - typically a few hundred to around a thousand pounds or dollars to get properly set up. You do not need capital to fund the jobs themselves, because client deposits cover materials and first-stage labour.

Do you need trade experience to start contractor arbitrage?

No trade skills are required. The work is winning jobs, managing subcontractors, and keeping clients informed. The skills that matter are sales confidence, organisation, and follow-through. Many operators come from sales, admin or other service businesses and learn the construction side on the job.

How long does it take to land the first contractor arbitrage job?

Most focused operators land their first paid job within four to eight weeks of starting properly - meaning they have a registered business, insurance, at least one vetted subcontractor, and a working lead channel. Going slow on setup and slow on lead generation is what stretches it to six months.

Can you start contractor arbitrage while still employed?

Yes. Many do. The first jobs can be quoted and managed around a day job if you can take calls during the day and respond to enquiries fast. Once your monthly margin reliably clears your salary, you make the switch. Starting this way removes the desperation that leads to underpricing.