How To Start A Payment Processing Company In The UK
Everything you need to know about entering the UK payments industry, from becoming a sales partner to building your own ISO.
Updated: September 2026
Table of Contents
Introduction
Starting a payment processing business can be an attractive opportunity. Almost every business needs a way to accept payments, whether that’s through a card machine, online payment gateway, payment link, virtual terminal or integrated payment system.
There’s also the potential to build recurring income. Depending on how your business is structured and who you partner with, you may be able to earn upfront commission, ongoing residual income from active merchants, or a combination of both.
But starting a payment processing company can mean very different things. You could become a lead referrer, work as a self-employed payment sales agent or reseller, establish an Independent Sales Organisation (ISO), or go much further and build your own payment technology.
For most people entering the industry, you don’t need to build a payment processor from scratch. Partnering with an established payments business can provide a much simpler route into the industry.
What Is A Payment Processing Company?
Payment processing is a broad industry involving acquiring banks, payment service providers, gateways, software companies, ISOs, resellers and agents.
At one end are companies providing the infrastructure that allows businesses to accept payments. At the other are businesses and individuals that find merchants, introduce them to providers and help them access suitable payment solutions.
An ISO typically works with acquiring partners to distribute merchant acquiring and related payment services. A reseller or referral partner can operate within the same market without necessarily taking on the responsibilities and infrastructure associated with becoming a full ISO.
Understanding where you want to sit within this chain is one of the first decisions you should make.
Who Can Start A Business In Payments?
You don’t necessarily need previous payments experience to get started. Existing sales experience and access to businesses can be just as valuable.
Self-employed salespeople, field sales agents and experienced door-to-door sellers may already have many of the skills required. If you’ve previously sold utilities, energy, broadband, telecoms, solar, business finance or other services directly to businesses, merchant services can be a natural sector to move into.
People with previous payments experience are also well placed. Card payment salespeople, merchant services agents and other industry professionals may decide they want to build their own merchant portfolio or create a more independent source of income.
Payments can also complement an existing business. Web developers, EPOS providers, accountants, commercial finance brokers, IT companies, software providers and consultants already work with businesses that may need payment services.
What these groups have in common is the ability to find and speak to business owners. Payment products can be learned. Consistently finding genuine opportunities and building relationships with merchants is often the harder part.
Why Start A Business In Payments?
Almost every type of business needs payments. Restaurants need card machines, e-commerce businesses need payment gateways, retailers may need integrated EPOS and many businesses now use payment links, virtual terminals and other ways of accepting payments.
For experienced salespeople, there’s another advantage: you’re usually selling a service the merchant already uses. The conversation isn’t necessarily about convincing a business to start accepting cards. It may be about whether its existing payment arrangement could be improved.
Payments can also provide recurring income. Depending on your agreement, you may receive commission when a merchant goes live as well as residual income linked to merchants that continue processing.
One merchant might only generate a relatively small residual each month. Build a portfolio of 50, 100 or several hundred active merchants and the commercial opportunity starts to look very different.
Lead Referrer, Reseller or Full ISO
Before starting, it’s important to understand the different routes available.
Ready To Start Building Your Payments Business?
Whether you want to refer the occasional merchant or build a larger portfolio, Payments World can help you get started. Access a range of payment providers, earn commission on successful business and build recurring residual income, with no minimum monthly merchant targets.
Become A Payment PartnerLead Referrer
Becoming a lead referrer is usually the simplest route into merchant services.
You identify a business that may need payment services and introduce it to your payments partner. They take over the detailed payment conversation, identify suitable products, handle the application and support the merchant through onboarding.
This can work particularly well for accountants, web developers, EPOS companies, finance brokers and other businesses that regularly encounter merchants but don’t want to become payments specialists themselves.
Reseller Or Sales Partner
A reseller or sales partner takes a more active role.
You might prospect for merchants yourself, discuss their requirements, explain available payment products and work with your provider to get the merchant signed and processing.
This route can be particularly attractive to self-employed sellers and people with experience in payments, utilities, broadband, telecoms, solar, door-to-door sales or B2B field sales.
It allows you to build your own merchant portfolio while still having an established payments business and its provider relationships behind you.
Independent Sales Organisation
Becoming a full ISO is a more substantial undertaking. An ISO may operate under its own brand, recruit its own salespeople, build a substantial merchant portfolio and establish direct commercial relationships with acquiring banks or payment providers.
That greater independence can bring greater commercial control, but it also comes with additional responsibilities, costs and contractual requirements.
Some acquiring banks may require particular types of ISO or partner to have appropriate FCA registration or authorisation depending on the activities being undertaken. Acquirers can also impose their own compliance and registration requirements.
Some ISO arrangements can also involve annual Visa and Mastercard registration costs. Depending on the acquiring arrangement and programme, these fees can be around £1,500 per year or more. The exact requirements and costs should always be confirmed directly with the relevant acquiring partner.
You may also encounter minimum performance requirements. Some ISOs and payment providers require partners to deliver a minimum number of merchants or level of business each month.
That’s worth understanding before signing an agreement, particularly if you’re starting from scratch.
How To Start A Payment Processing Business
Once you’ve decided which model suits you, think about where your merchants are going to come from.
Trying to sell payment services to every business in the UK isn’t necessarily the best strategy. Choosing a particular sector can give you a clearer proposition and help you understand what your merchants actually need.
A restaurant may care about EPOS integration, card machines and settlement times. An e-commerce business may be more concerned with payment gateway integration, international transactions, fraud prevention and chargebacks.
Alternatively, your market may already exist. If you’ve spent years selling broadband to SMEs, visiting businesses as a field sales agent, working with hospitality companies or providing websites to local businesses, you already understand how to reach potential merchants.
You can build from there rather than starting completely cold.
Find The Right Payments Partner
The company you work with can have a major impact on your success, so don’t choose purely on whoever advertises the biggest commission.
Look at the range of providers they can access, the types of merchants they support, how quickly applications are handled and what support is available when a merchant has a problem.
You should also understand exactly how you’ll be paid. Is there an upfront commission, an ongoing residual or both? How often are commissions paid? Who owns the merchant relationship? What happens to your residual income if your relationship with the provider ends?
Minimum targets are another important consideration. Some payment providers and ISO programmes expect partners to produce a certain amount of business every month.
Payments World does not impose a minimum monthly merchant target on its partners. If you’re building a new business, you can therefore grow your portfolio at a pace that works for you.
Learn The Basics Of Merchant Payments
You don’t need to become a payments expert before you start, but you should understand what you’re introducing or selling.
Learn the basics of merchant acquiring, card processing fees, interchange, scheme fees, settlement, chargebacks, payment gateways, PCI DSS and the difference between card-present and card-not-present transactions.
You should also understand that merchants aren’t automatically accepted. Acquirers assess businesses based on factors such as their sector, trading history, processing requirements, chargeback exposure and overall risk.
The more you understand these fundamentals, the easier it becomes to recognise genuine opportunities and have credible conversations with businesses.
Regulation And Compliance
Regulation is one area where you need to be careful. Certain payment activities are regulated in the UK. Businesses actually providing regulated payment services may require FCA authorisation or registration depending on the services they provide and how they operate.
That doesn’t mean somebody referring a merchant for a card machine automatically needs to become FCA authorised. There is an important distinction between introducing a business, selling products provided by an established payments company and actually providing regulated payment services yourself.
Individual acquiring banks and providers can also have their own requirements. Some may require particular types of ISO or partner to have FCA registration or satisfy additional compliance requirements before they’ll establish a commercial relationship.
As you move from simply referring leads towards operating your own ISO, your responsibilities generally increase. Your business structure, contracts, sales practices, involvement with merchant information and the services you actually provide all become relevant.
If you’re planning anything beyond a straightforward referral or reseller arrangement, establish the requirements with your prospective acquiring partners and obtain appropriate professional advice where necessary.
How Do Payment Partners Make Money?
Payments businesses and partners can earn through upfront commission, ongoing residual income or a combination of the two.
An upfront commission may be paid when an introduced merchant successfully goes live. Residual commission can then provide ongoing income linked to the merchant’s processing activity or the revenue generated by that account, depending on the commercial agreement.
Residuals are particularly interesting because you’re gradually building a portfolio.
For example, 60 active merchants generating an average £20 monthly residual would produce £1,200 per month. At an average of £50 per merchant, the same portfolio would generate £3,000 per month.
Those are illustrative examples rather than earnings promises. Not every opportunity will convert, some applications will be declined, merchant processing volumes vary and businesses can leave.
Calculate Your Potential Residual Income
Use our calculator to explore how the number of merchants you introduce and their processing activity could translate into potential recurring residual income.
Calculate Your Potential Residual Income
Adjust the figures below to see how a portfolio of processing merchants could translate into potential monthly and annual residual income.
Illustrative figures only. Actual residual earnings depend on your commercial agreement, merchant activity, processing volumes, pricing, retention and payment provider.
How Quickly Could You Build A Merchant Portfolio?
Consistency can make a substantial difference to the value of a payments business.
If you successfully add two new merchants each month, that’s potentially 24 merchants during your first year. Five per month could mean 60, while an experienced self-employed payment salesperson averaging ten successful merchants each month could potentially add 120.
Over two or three years, those numbers can build significantly, particularly when you’re adding new merchants while continuing to earn residuals from qualifying businesses you’ve previously introduced.
Merchant Portfolio Calculator
Use the calculator below to see how your merchant portfolio and potential residual income could grow over time.
See How Your Merchant Portfolio Could Grow
Choose how many new merchants you think you could add each month and see what your portfolio could look like over three years.
This is a simplified illustration. It assumes merchants are added consistently throughout each year and applies the selected annual retention rate to merchants from previous years.
What Are The Risks?
Payments can provide an attractive commercial opportunity, but you’re recommending financial products and services that can have a real impact on another business.
Mis-selling therefore needs to be taken seriously. Misleading merchants about rates, hiding charges, making unrealistic savings claims or placing a business into an unsuitable product can result in complaints, contractual disputes and potentially legal challenges.
It can also put your acquiring relationships at risk. If an acquiring bank or payment provider has concerns about the way you’re selling its products, it could restrict your ability to submit business or terminate the relationship altogether.
Never manipulate information on an application simply to get a merchant accepted, and don’t guarantee approval before underwriting has taken place.
Your reputation matters too. If you introduce one of your existing clients to a provider that gives them poor service, that can damage your wider relationship with that business.
The aim should therefore be to build a quality merchant portfolio rather than simply signing as many businesses as possible.
Read Your Commercial Agreement
This deserves particular attention if you’re serious about building a long-term payments business. Understand how residuals are calculated, when you’re paid, who owns the merchant portfolio and what happens if a merchant changes provider.
You should also establish what happens if you leave the provider. Do your residuals continue, or do you lose them? Are there restrictive clauses? Is there a minimum monthly sales requirement?
A very attractive headline commission isn’t necessarily attractive if the underlying agreement gives you little long-term protection.
Do You Actually Need To Become A Full ISO?
For many people, no. If your objective is to find merchants, help businesses with their payments and build commission income, becoming a lead referrer or reseller can provide a much simpler route into the industry.
You can concentrate on building relationships and generating opportunities while an established payments business provides the provider access, application support and payment expertise.
It also gives you the opportunity to prove the business model before committing to potential ISO registration costs, additional compliance responsibilities or minimum sales requirements.
As your merchant portfolio and industry knowledge grow, you can always explore becoming more independent later.
Can You Start A Payments Business Part Time?
Potentially, yes. A referral or reseller model doesn’t necessarily require you to leave your current employment or business and immediately become a full-time payment salesperson.
You could start with a handful of introductions, learn how the industry works and gradually build your merchant portfolio.
This can be particularly attractive for someone already self-employed in another sales industry or running a business that regularly deals with SMEs.
As your portfolio and residual income grow, you can decide whether payments remains an additional revenue stream or becomes a larger business in its own right. If you’re currently employed, make sure your employment contract doesn’t restrict outside business activities.
Why Partner With Payments World?
Payments World provides a route into merchant services without requiring you to build the underlying payment infrastructure yourself.
We’re not restricted to a single payment product. We work across a network of payment providers and acquiring partners, giving us greater flexibility when looking for suitable solutions for the businesses our partners introduce.
If you’re already experienced in merchant services, we can help you access a broader payments proposition. If you’re coming from utilities, broadband, telecoms, solar, field sales or another B2B sales environment, we can provide the payments support while you concentrate on generating opportunities.
There are no minimum monthly merchant targets through Payments World. You might introduce the occasional opportunity alongside your existing business, or you may want to build a substantial self-employed merchant services operation.
Our partner programme can also work particularly well for web developers, EPOS providers, accountants, commercial finance brokers, IT and telecoms companies, consultants and software providers.
You concentrate on finding opportunities and building relationships. We help with the payment expertise, provider access, applications and onboarding.
Payments World also has partnerships available with our sister companies such as Cheap Card machines, Taxi Payments, Epos Finder & Card Finder.
Is Starting A Payment Processing Business Worth It?
Payments offers a large potential market and the opportunity to create recurring income, but it isn’t effortless passive revenue.
Building a valuable portfolio requires finding good businesses, understanding what they need, selling responsibly, working with reliable providers and retaining merchants over time. The advantage is that you don’t necessarily need to build everything yourself.
Starting as a referrer or reseller allows you to learn the industry, generate revenue and build a merchant portfolio before deciding whether you eventually want to establish a larger payments business or ISO.
For some people, payments will remain a useful additional income stream. For others, it could become the foundation for a much larger business.
Start Your Payments Business With Payments World
Whether you’re an experienced payments professional, a self-employed salesperson, a field sales agent, a door-to-door seller or someone already providing services to UK businesses, there are several ways to build a business within merchant services.
Payments World can support you with payment solutions and provider relationships while you concentrate on what you do best: finding opportunities and building relationships with businesses.
You don’t need to build your own payment processor or become a full ISO to get started.
This article is provided for general information only and does not constitute legal, regulatory or financial advice. Regulatory requirements, registration requirements and associated costs vary depending on the activities undertaken, acquiring partner and structure of the business. You should confirm requirements with the relevant provider and obtain appropriate professional advice where required.
Ready To Start Building Your Payments Business?
Whether you want to refer the occasional merchant or build a larger portfolio, Payments World can help you get started. Access a range of payment providers, earn commission on successful business and build recurring residual income, with no minimum monthly merchant targets.
Become A Payment PartnerFrequently Asked Questions
Most frequent questions and answers
No. Previous merchant services or payments experience can be useful, but it isn’t essential. People with experience in B2B sales, utilities, broadband, telecoms, solar and other self-employed or field sales roles may already have many of the skills needed. Payments World can support partners with the payments side while they focus on finding and building relationships with businesses.
Not necessarily. The requirements depend on what your business actually does and the relationship you have with the payment provider or acquiring bank. A straightforward lead referrer will have very different responsibilities from a business operating as a full ISO or providing regulated payment services. Some acquiring partners may also have their own registration requirements, so these should always be checked before entering into an agreement.
There is no fixed amount. Earnings can depend on the number and type of merchants you introduce, their processing activity and your commercial agreement. Partners may receive upfront commission, ongoing residual income or a combination of both. Building a larger portfolio of active merchants can create recurring income over time, but earnings are never guaranteed.
No. You can start as a lead referrer or reseller without establishing your own full ISO operation. This can allow you to start finding merchants and building a portfolio without immediately taking on the additional costs, provider relationships and compliance requirements that may come with operating an ISO. Payments World also has no minimum monthly merchant target for partners.
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