Invoicing and payments

You billed $10,000. Why did you receive $9,700?

Because your invoicing platform's default is card payments, and the card networks took their 2.9%. That's $290 this month, roughly $3,500 a year, per client who pays that way. For sending a B2B invoice that a finance team would happily have paid by bank transfer for free.

By Jeff Lerner, fractional CMO and founder of SEVRL · July 2026

Retainer billing is a strange fit for invoice tools

Think about what a fractional practice actually sends: nearly identical invoices, on a schedule, to a handful of businesses, most of which prefer paying by ACH or wire because that's how their accounts-payable process works anyway. Now look at what the popular tools optimize for: one-off invoices, card checkout, and taking a percentage.

The mismatch shows up as a monthly ritual. First of the month, open the tool, remember what changed for each client, rebuild the same line items as last month, send, and then, because the invoice tool and whatever tracks your income don't talk, type the same numbers into a spreadsheet. Half an hour to an hour of clerical work, twelve times a year, for the privilege of paying fees.

The quiet cost of losing track

The third leak is the one nobody budgets for. Who's paid? Who's fifteen days late? If the answer lives in your bank statement and your memory, some invoices slip. Independents write off a surprising amount of earned revenue this way, not from disputes, just from losing the thread. And a late payment you never noticed is a late payment you never chased, which trains a slow-paying client to stay slow.

What one-click retainer billing looks like

The system already knows each client's monthly amount, or their logged hours and rate. So the invoice should draft itself from that record, carry your own bank details for direct payment, and go out as a clean link your client's finance person can open without an account. Draft, sent, paid status where you can see it, and, this is the part that kills the spreadsheet, marking it paid should update your income records automatically, because they're the same system.

That's SEVRL's invoicing. One click from retainer or logged hours. No processing fees taken from your revenue, ever; card payments are coming as an option for clients who want them, not as a toll. The outstanding total sits on the page so nothing slips. Five clients, five minutes a month.

Keep reading: how to calculate your effective hourly rate · escaping the feast-famine revenue cycle