What high-risk means
It is how banks and acquirers score model risk: MCC / vertical, pay-now / deliver-later, ticket size, refund and chargeback history, geography, subscription vs one-shot, financials, prior history, and policy clarity. It is not a moral judgment. Higher friendly-fraud or delayed-delivery models draw more scrutiny.
Rolling reserves vs holds
A rolling reserve is collateral: a percentage of each batch withheld and released after a period in your agreement. A capped reserve builds to a ceiling. A payout or processing hold is a temporary freeze, often after spikes, dispute jumps, or verification. Read percentage, cap, release schedule, and change rights. Plan working capital. We do not publish a typical reserve percentage as a Milestone promise.
Chargebacks beyond the fee
Direct cost is the dispute plus fees and ops time. Indirect cost is monitoring pressure, higher reserves, lower caps, and termination risk. Descriptors, policies, support, and decline / fraud tooling matter as much as fighting every case.
Underwriting prep
Expect KYB docs, ownership, financials, processing history, website and funnel review, fulfillment narrative, refund rules, and corridor forecasts. Common friction: misaligned MCC, unclear fulfillment, sudden volume without history. Honesty beats shopping for a label. Milestone helps prepare and choose fit; Milestone does not underwrite or approve accounts.
What we do / What we don't
Do: Prepare merchants for underwriting reality; improve stack and commercial structure; prove secondary paths when capacity is fragile.
Don't: Underwrite accounts, guarantee approval, or market as a gray high-risk ISO.
Related: MCCs explained · Multi-rail · FAQ