• Oleg Ishchenko, Sales Manager at Corefy


• 29.10.2026 09:30 am
#PaymentProcessing

Picture a Thursday afternoon. Your acquirer’s risk team emails to say the account is under review, and from Monday, 15% of every settlement will be held for 180 days instead of 10%. The email doesn’t invite negotiation, because it doesn’t need to. You have no other underwritten relationship to move volume to, and they know it.

For most high-risk merchants, the most valuable asset in the business isn’t the product or the traffic. It’s a live, underwritten relationship with an acquirer willing to process the volume. Usually there’s exactly one of those, and the merchant has very little say in how long it lasts.

A finance team would call that a concentration problem on sight. Few CFOs would accept running the business on a single bank, or on one supplier of their main raw material. Yet merchants in gaming, subscriptions, travel and nutraceuticals routinely treat their acquirer as infrastructure, when it’s a counterparty with its own risk appetite, its own scheme obligations and its own exit options. Below is where that assumption cracks, and what to do before it does.

Underwriting doesn’t stop at onboarding

Approval for a high-risk merchant account is a point-in-time decision. The acquirer looks at your business model, merchant category code (MCC), processing history, and ownership at that moment, then keeps re-underwriting you for as long as the account lives. Every chargeback report, volume spike and change in product mix goes into the file.

Your behavior is only half the picture. The acquirer answers to the card schemes for its whole portfolio. On 1 April 2026, Visa lowered the ‘excessive’ merchant threshold in the Visa Acquirer Monitoring Program (VAMP) from 2.2% to 1.5% for the US, Canada, the EU and Asia-Pacific, and acquirers have portfolio tiers of their own at 0.5% and 0.7%. When an acquirer creeps towards a tier, it passes the pressure down: a remediation plan, tighter terms for the merchants driving the ratio and, in serious cases, termination.

Your ratio gets judged against a limit that’s partly shaped by the acquirer’s other clients and its own appetite. You control neither, and with only one acquirer you have nowhere to go when that appetite shifts.

Reserves: the acquirer’s uncertainty, your cash

Reserves are where that uncertainty lands on your cash flow. A rolling reserve typically holds back 5–10% of each transaction for 30 to 180 days, and the maths is less friendly than it looks. Say you process $2m a month under a 10% reserve held for 180 days. At steady state, about $1.2m is sitting with the acquirer. That’s roughly 18 days of revenue funding someone else’s balance sheet.

Two things matter more than the headline rate. First, the terms bend on their side: percentage, cap, hold period and review trigger all live in the contract and can be reset when the acquirer’s view of you changes. Second, with a single relationship you have nothing to compare against. Is a 10% reserve for 180 days normal for your vertical, or a premium for a thin underwriting file? You can’t tell from inside one contract, and terms agreed on a lone offer get set by whoever has the better alternative.

Where the concentration risk hides

• Continuity. If the acquirer leaves your vertical or ends the account, volume stops that day. The founder of a high-risk subscription business we work with told us it was ‘common for our payment providers to shut us down’. For that merchant, shutdown risk was part of everyday operations, not a rare event.

• Cash. Your reserves and unsettled balances sit with the same counterparty that just showed you the door. They’re released on the contract’s schedule, whatever your payroll calendar says.

• Record. Mastercard’s Excessive Chargeback Program kicks in at 100 or more chargebacks and a 1.50% ratio in the same month. A termination for excessive chargebacks can put you on Mastercard’s MATCH list, the shared database of merchants terminated for cause, for five years. That record sits in front of every underwriter you speak to afterward, and it usually costs you more than the volume you lost.

What to do about it

Treat your acquirer like any other critical supplier. Four habits help:

1. Line up a second acquirer while the first one’s still happy with you. Twelve clean months of history gets you to the table from a position of strength. Apply after a termination, and you apply from the MATCH list.

2. Compare reserve terms side by side. Ask each acquirer for percentage, cap, hold period, release trigger, and review cadence in writing. Two offers turn a take-it-or-leave-it clause into a negotiation, and the gap between them shows what your risk profile is worth to each of them.

3. Watch your own ratios, and keep them well under the scheme limits. Track disputes and fraud internally, and ask each acquirer what its internal limits are. They can be stricter than the public ones, and they’re the numbers that decide your account’s future.

4. Set an exposure ceiling. Decide the most volume and the most trapped cash you’re comfortable having with any one acquirer. Review it quarterly, the way finance reviews counterparty limits.

When one acquirer is enough

A second acquirer isn’t free. You onboard twice, split volume across two pricing schedules, and may lose a tier on your rates. Some acquirers push for exclusivity, and assembling a high-risk underwriting file takes time even once. If your volume is modest, your dispute ratio sits well below every threshold and your acquirer has been stable in your vertical for years, those costs can outweigh the benefit. In that case, I’d spend the effort elsewhere.

For everyone else, the comparison is between a cost you can schedule and one you can’t. Onboarding a second acquirer is a known project with a known budget. A mid-quarter reserve increase or a frozen settlement balance arrives on the acquirer’s timetable. If payments carry your business, I’d rather pay the first bill on my own schedule.

A second acquirer won’t lower your risk category. What it changes is your position when terms move. A reserve proposal becomes something you can negotiate, a scheme-driven tightening becomes a line in the budget, and a termination becomes a migration you’ve already planned. Corefy connects merchants to 650+ payment providers, so adding that second relationship is a commercial exercise rather than a re-integration. If you're mapping your own exposure, talk to our team.