The Residual Math Every New Agent Should Run

The single most useful thing a new agent can do in their first month is build the residual model nobody handed them. Not the optimistic version your recruiter showed you. The honest one — with splits, attrition, ramp time, and the boring monthly costs that quietly eat your number. Here's how to build it, and what the result tells you about whether you're in the right shop.

The basic equation

Your monthly residual on any given merchant is, roughly:

If a merchant does $60,000 in monthly volume on an interchange-plus program where the effective markup nets to 35 basis points, the residual pool on that merchant is $210/month. At a 60% agent split, you make $126/month on that one merchant — every month, for as long as they process.

Multiply across the book

Run that math across 25 merchants at the same profile and you're looking at roughly $3,150/month, or about $37,800 annualized. That's not a hypothetical — that's a small but functional book at month 18-24 for a focused agent. Use our residual calculator on the Agents page to model your own assumptions.

Now subtract attrition

Here's the part the recruiter slide deck never shows. Merchants churn. Some go out of business. Some get bought. Some get a cold call from a processor offering a 10 bps lower rate and don't tell you they're leaving until you see the residual report.

Industry-typical attrition for an agent book is somewhere between 12% and 20% per year. That means a quarter of the book you build in year one is gone by month 24 if you do nothing. The math only works if your gross adds outpace your net losses.

Ramp time is real

A merchant signed today doesn't pay you next week. They have to board (typically 1–3 days for standard accounts), go live (variable), batch enough volume to register on the residual report, and clear the first reconciliation cycle. From handshake to first residual check is often 45–60 days.

Plan your first 90 days assuming zero residual income. Plan months 4–12 as the ramp. By month 12, if your model is working, you should see your monthly residual line cross your monthly cost-of-doing-business line. That's the inflection point every agent is looking for.

What a healthy book looks like at 24 months

Order-of-magnitude only, but useful as a sanity check:

• 40–80 active merchants, depending on average size
• Average merchant volume in the $40K–$100K monthly range for a typical card-present book
• Monthly residual income between $3,500 and $9,000, depending on split, mix, and pricing model
• Net add rate of 3–5 merchants per month, after attrition
• Residual visibility that matches your bank deposit to the dollar

If your numbers at 24 months are well outside that range, the variable is usually one of three things: your ISO's economics, the verticals you're targeting, or the cadence of your prospecting. None of those are unfixable — but you can't fix what you can't see.

The questions the math forces you to ask

1. What's my split off of — gross income or net of deductions? (This swings the model by 20-30%.)
2. What's the published BPS I should assume on a typical card-present account?
3. What's my realistic monthly add rate at my current activity level?
4. What's my book's actual attrition rate over the last 12 months — not the industry average?
5. What does the residual report look like, and does it reconcile to the bank deposit?

Why we publish this

Most ISOs don't want their agents running this math, because the math reveals when the relationship isn't paying what the recruiting pitch promised. We're publishing it because the agents we want — disciplined operators who plan past month three — are exactly the agents who run this spreadsheet anyway.

If you've built the model and the numbers point you toward a conversation with us, our partner application is on the Agents page. Bring the spreadsheet. We'll walk through it together.