Accounting, Auditing & Bookkeeping Services.
Accountancy, audit and bookkeeping practices.
- MCC
- 8931
- Category
- Professional Services & Membership
- Cardflo support
- Yes
What MCC 8931 covers
Merchant Category Code 8931 is the ISO 18245 identifier used by the card networks for accounting, auditing & bookkeeping services. Acquirers, issuers and regulators use this code to set interchange, scheme fees, fraud rules and reporting categories for every transaction your business processes.
Accountancy, audit and bookkeeping practices. Choosing the right MCC is critical: an incorrect code can lead to higher interchange, surcharges, or, in regulated categories, declined transactions and account holds.
MCC 8931 covers accounting, auditing, and bookkeeping services. These are typically B2B professional services, ranging from sole practitioners to large firms.
Ticket sizes vary from small monthly bookkeeping fees to substantial annual audit contracts. Payment frequency can be recurring (monthly/quarterly) for ongoing services or project-based for one-off engagements like tax returns.
Chargebacks are rare but can occur due to 'services not as described' (e. g. , perceived errors in reports, missed deadlines) or 'cancelled services'. Due to the trusted nature of these services and professional relationships, fraud is generally low.
Schemes typically classify this as a standard low-risk MCC without specific programmes.
Cardflo's recurring billing solutions are highly beneficial for accountancy practices offering subscription-based services, ensuring high approval rates for repeat transactions and reducing administrative overhead.
Configure acceptance to support both recurring billing for ongoing bookkeeping and project-based payments for audits or tax returns. Prioritise a multi-acquirer approach to optimise transaction costs, especially for smaller, frequent recurring payments where interchange fees can accumulate.
For CNP transactions, 3DS2 should be employed selectively to balance security with client convenience, particularly for established clients. Expect minimal reserve requirements due to the low-risk nature.
Ensure your payments platform integrates seamlessly with your accounting software for efficient reconciliation and detailed transaction reporting.
Acquirer and acquirer assessment stance.
Low-risk standard board. These merchants benefit from strong client relationships and are generally solvent, leading to predictable revenue and minimal chargeback exposure.
Standard terms with no specific reserves are common.
Dispute and chargeback profile.
The primary reason codes are 13.1 / 4853 (services not as described) and 13.3 / 4863 (cancelled recurring). 'Services not as described' might result from perceived errors in reports, missed deadlines, or a lack of clarity on deliverables.
Counter with signed engagement letters, clear service agreements, evidence of report submission, and communication logs. 'Cancelled recurring' typically happens when a client disputes ongoing fees after cancelling; provide proof of cancellation policy adherence and services rendered up to the cancellation date.
See also: chargeback management · payment response codes · Compelling Evidence 3.0.
Book a scoping call to see how Cardflo would set you up.
How Cardflo handles MCC 8931
- Placement with acquirers that actively board MCC 8931 businesses in your region.
- Subscription and membership-billing infrastructure built for recurring revenue.
- Member-data tokenisation that survives card reissues and updates.
- Dunning and retry logic tuned to professional-services renewal patterns.
- Reporting aligned with how associations and professional bodies close their books.
- Dedicated onboarding manager familiar with membership and professional-services billing.
Payment methods typically enabled.
Onboarding checklist.
What acquirers typically ask to see when boarding MCC 8931. Cardflo collects this once and reuses it across every acquirer we route you through.
- Business registration and beneficial-owner documentation (KYB, UBO).
- Regulator authorisation, chartered body membership or equivalent credential.
- Standard engagement letter or membership terms and conditions.
- Refund, cancellation and renewal-notice policy for recurring billing.
- Six months of processing statements demonstrating billing cadence.
- Six months of processing statements or bank statements demonstrating trading pattern.
See also: Know Your Customer (KYC) · high-risk merchant · smart routing.
Talk to an acquiring specialist about your MID setup.
Common questions
How do recurring billing solutions benefit accounting firms?
Recurring billing automates the collection of fees for ongoing services (e. g. , monthly bookkeeping, quarterly payroll). This reduces administrative work, improves cash flow predictability, and minimises late payments.
Cardflo's subscription management tools can handle various billing frequencies and automatically update expired card details, enhancing customer retention.
What PCI DSS compliance requirements apply to small accounting firms accepting card payments?
All merchants accepting card payments, regardless of size, must comply with PCI DSS. For small accounting firms, typically Payment Gateway Integrated (PGI) solutions (SAQ A-EP or SAQ A) are applicable, provided they do not store sensitive card data themselves.
Using a PCI-compliant payment gateway like Cardflo's offloads much of this burden.
Can accounting firms use surcharging for card payments?
The ability to surcharge card payments depends on local regulations and scheme rules. In the UK and EU, surcharging for consumer cards is generally prohibited.
For commercial cards, it may be permissible under specific conditions, but firms must clearly disclose any fees to clients. It's advisable to consult with Cardflo's compliance team and legal counsel.
What is the most effective way for an accounting practice to manage recurring monthly billing for bookkeeping services to minimise payment failures?
To minimise payment failures for recurring monthly bookkeeping services, implement a robust tokenisation strategy coupled with an account updater service. Tokenisation securely stores card details, while the account updater automatically updates expired or reissued card numbers, reducing passive payment failures.
Ensure your gateway supports Retry Logic, which intelligently re-attempts failed transactions. Clearly communicate billing dates and utilise pre-dunning notifications to alert clients of upcoming charges or failed payments, encouraging them to update details proactively.
Offer multiple payment options, including direct debit, for client convenience.
How should an audit firm handle card payments for large annual contracts, ensuring security and client confidence for high-value transactions?
For large annual audit contracts, prioritise secure CNP processing using 3DS2 on initial payments to authenticate the cardholder for high-value transactions. Subsequently, tokenise the card details for any future authorised billing, reducing the need for clients to re-enter sensitive information.
Offer clear, itemised invoices accessible digitally, which enhances transparency and confidence. Consider offering A2A payments as an alternative for clients preferring bank transfers for substantial sums, which can also carry lower processing fees.
Ensure PCI DSS compliance for all card data handling.
Other MCCs in Professional Services & Membership
Related industries.
Related features.
Related guides.
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