Short answer
An independent sales organisation (ISO) is registered with an acquirer to sell card processing. Its agents typically earn a share of the ongoing processing margin on the merchants they bring in, called residuals, sometimes with upfront payments and equipment margins. Income builds as the portfolio grows, but depends on volume, retention and the agreement you sign.
Part of Selling and savings quotes. Start with the main guide: Merchant statement analysis in five minutes: a repeatable method
Key takeaways
- Residuals are a share of the processor's ongoing margin on a merchant, paid for as long as the merchant stays.
- Other income can include upfront bonuses, equipment margins and referral fees, depending on the agreement.
- Income builds with the number of merchants and their volume, and falls when merchants leave.
- Commission varies widely, and the figures quoted by vendors are marketing, so read the agreement.
- Your pay should never decide your advice. Recommend what fits the merchant and be open about how you are paid.
People who ask "how do ISO agents get paid?" are usually weighing a career move. They have heard of recurring income from merchants and want to know whether it is real. It is, in the sense that the structure exists, and it is often oversold, in the sense that what an individual earns depends on many things that sales pages leave out.
This guide explains the structure plainly: what an ISO is, how residuals work, what else is paid, a worked example of how income builds and the conflicts of interest that anyone in this business should manage. It is general information and not an offer of work. The terms vary by acquirer and by agreement, and the income figures quoted by vendors are marketing, so read the agreement you are offered.
Who is who in an ISO deal?
Our guide to acquirer, ISO, payfac and gateway explains how the roles fit together.
How does the money flow?
Every card payment carries three layers: interchange, scheme fees and the provider's margin. The provider's margin is what is shared. The merchant pays it, the acquirer and ISO split it, and the ISO pays the agent a share.
- Merchant pays the markupThe provider's margin on each payment, plus monthly fees.
- Acquirer keeps its partFor processing, settlement, risk and compliance.
- ISO keeps its partFor sales, support and the merchant relationship.
- Agent receives a shareOften called residuals, paid monthly while the merchant stays.
The merchant's markup is divided down the chain.
See acquirer markup explained for how to find the provider's margin on any statement.
What types of income are there?
| Type | What it is | Pattern |
|---|---|---|
| Residuals | A percentage of the ongoing processing margin on each merchant | Monthly, for as long as the merchant stays |
| Upfront or signing payment | A one-off payment when a merchant goes live | One-off |
| Equipment margin | Profit on selling or leasing a terminal | One-off or monthly |
| Referral fee | A smaller fee for introducing a merchant to someone else | One-off |
| Bonuses | Targets for volume or number of merchants | Periodic |
One vendor says commissions can range from a few hundred dollars to several thousand dollars per client, depending on processing volume and the complexity of the account. Treat figures like that as marketing, not as what a new agent should expect. What matters is the share you are offered, the margin on the merchants you can realistically win and how many stay.
What does a worked example of residuals look like?
Take a merchant whose provider earns £79.00 a month in margin and fixed fees, in line with the example in acquirer markup explained. Suppose the agent's agreement pays 50% of that as a residual.
- Residual per merchant: £79.00 × 50% = £39.50 a month
Income grows with the number of merchants. If an agent adds five merchants a month and none leave, the recurring income builds like this.
| After | Merchants | Monthly residual income |
|---|---|---|
| 6 months | 30 | £1,185 |
| 12 months | 60 | £2,370 |
| 18 months | 90 | £3,555 |
| 24 months | 120 | £4,740 |
- Monthly residual income
View the data as a table
| Monthly residual income | |
|---|---|
| Month 6 | £1,185 |
| Month 12 | £2,370 |
| Month 18 | £3,555 |
| Month 24 | £4,740 |
£39.50 a month per merchant, five new merchants a month, no merchants leaving. Illustrative, not a forecast.
This is the appeal of residuals: income that continues from work already done. But three things temper it.
- Attrition. Merchants leave when they close, switch or find a better deal. A portfolio that loses 2% of merchants a month grows more slowly than the chart shows.
- The pace of wins. Winning five merchants a month is a lot of work for most people. Many agents win far fewer.
- The agreement. The share, the length of time residuals are paid and what happens if you leave the ISO all vary. Some agreements pay residuals only while you work with the ISO, or reduce them after a period.
Why does transparency matter?
Agents should be able to see the margin on every fee charged to a merchant. Industry commentary notes that some platforms show agents the margin on each fee they set, which makes it possible to decide a price knowing exactly what you earn. If you cannot see your margin, you cannot tell whether a quote is fair to the merchant or to you.
Questions worth asking any ISO:
- How is my share calculated, and can I see the margin on each merchant?
- Is it based on revenue or profit, and after which costs?
- How long are residuals paid, and what if I leave?
- What are the exit and clawback terms if a merchant leaves early?
- Who sets the merchant's pricing, and how much freedom do I have?
- What support, training and compliance help do you provide?
How do you manage the conflict of interest?
Every sales role has one: what pays you best may not be what suits the customer best. In merchant services it is sharp, because a higher markup is more income for you and a higher cost for the merchant. Three habits help.
- Price to the merchant's benefit first. Compare your offer against their current cost, and make sure they are better off. See honest comparisons and misleading claims.
- Be open about how you are paid. If a merchant asks, tell them. You do not have to give your numbers, but you should not hide the structure.
- Keep your workings. If a merchant or regulator asks why you recommended something, you should be able to show it.
A consultant who earns well over years usually does it by having merchants who stay, which means merchants who feel fairly treated.
What affects how much you earn?
- The size of the merchants you win. A busy shop pays more margin than a stall.
- Pricing freedom. Whether you set the markup or it is fixed.
- Retention. Merchants who stay keep paying residuals.
- Time to win a merchant. Sales cycles vary, and notice periods delay switches. See contract length, auto-renewal and notice periods.
- Costs and support. Some ISOs charge fees or provide more support.
- The rules where you work. Licensing, registration and consumer protections vary.
How do you get started?
If you are weighing up whether this is for you, remember that residuals reward patience. The first months of work can pay little, and the income comes from merchants who stay.
A realistic first step is to learn the work before you worry about the income. Read statements, learn the pricing models and practise the analysis. Our guides to how to read a merchant statement and the first 90 days as a payment consultant are a start. A tool like the checkmyrates calculator helps you turn a statement into a clear comparison quickly.
Frequently asked questions
What is an ISO in payments?
An independent sales organisation, registered with an acquirer or a card network programme to sell card processing. It signs up merchants and typically handles sales and support.
How do ISO agents get paid?
Mostly through residuals, a share of the ongoing processing margin on the merchants they bring in, and sometimes upfront payments, equipment margins and bonuses. The terms depend on the agreement.
What are residuals?
A recurring payment, usually monthly, based on a share of the margin earned from a merchant's card processing. They continue while the merchant stays, subject to the agreement.
How much can an agent earn?
It varies widely with volume, merchant size, retention and the agreement. Figures quoted on vendor sites are marketing, so treat them with caution and ask for the real terms.
Do I keep residuals if I leave an ISO?
It depends on the agreement. Ask before you sign.
How do I avoid a conflict of interest?
Make sure the merchant is better off on your offer, be open about how you are paid and keep records of your analysis and recommendation.
Sources and further reading
Figures in this guide are examples to show the method. Fees, rules and rates change, so check your own statement, contract and current rules before you decide. This is general information, not financial or legal advice.