MCC-based routing
Optimise transaction routing based on the Merchant Category Code (MCC) of the transaction.
Cardflo's MCC-based routing enables merchants to direct payments to acquirers that specialise in specific industries or offer preferential rates for certain MCCs, enhancing approval rates and reducing processing costs for high-risk or specialised sectors.
- Category
- Routing
- Capabilities
- 10
- Available on
- All plans
The overview
Merchant Category Code (MCC) routing involves the systematic steering of transaction traffic based on the four-digit classification assigned by card schemes.
In the payments stack, this functionality resides within the orchestration or gateway layer, acting as a traffic controller before the authorisation request reaches an acquirer. Different acquiring banks maintain varying risk appetites and sector specialisations, leading to significant fluctuations in approval rates for specific codes.
By analysing the MCC at the point of checkout, a merchant can direct the request to the specific Merchant Identification Number (MID) or acquirer best equipped to handle that industry type.
This process is particularly critical for enterprises operating across diverse verticals, such as a conglomerate managing both travel and retail arms.
Proper MCC management ensures that transactions are not unfairly flagged as high-risk by conservative issuers, while also facilitating compliance with regional scheme rules and domestic clearing requirements.
How it works
Identification of Category Code
When a transaction is initiated, the system identifies the assigned MCC associated with the specific product or service being sold.
This digit string, defined by ISO 18245, communicates the nature of the merchant's business to the issuing bank and the card scheme during the initial stage of the authorisation process.
Rule Engine Evaluation
The orchestration layer evaluates the transaction against a predefined set of logic gates.
If the MCC matches a specific criteria, such as a high-risk classification or a specialised service type, the system prepares to bypass default routing paths in favour of a provider with a specific appetite for that sector.
Dynamic Acquirer Selection
The payment is directed to an acquirer that has demonstrated higher historical authorisation rates for that specific code.
This selection often accounts for the acquirer's relationship with local issuers and their familiarity with the chargeback patterns typical of that particular industry, minimising the likelihood of an immediate decline.
Redundancy and Fallback Execution
If the primary targeted acquirer returns a soft decline or technical error, the system utilises a secondary route.
This fallback mechanism ensures that specialised MCC transactions are not lost due to temporary provider outages, maintaining a secondary path to a diverse acquirer with a compatible risk profile.
Why it matters
Optimising Authorisation Performance
Issuing banks apply different fraud scoring logic based on the MCC. By routing through an acquirer that is recognised for high-quality traffic in a specific sector, merchants can reduce the instance of false positives.
This is vital for sectors often misclassified as high-risk, where standard routing might lead to excessive refusal rates and lost revenue.
Managing Interchange and Scheme Fees
Interchange rates are frequently tied to the merchant's industry classification. Routing by MCC allows a business to ensure that transactions are processed through the MID that qualifies for the lowest possible interchange tier.
This prevents the unnecessary inflation of processing costs that occurs when transactions are incorrectly routed through generic or higher-cost channels.
Strategic Risk Distribution
Distributing volume based on industry classification protects the merchant's primary acquiring relationship. By isolating higher-volatility MCCs to specialised providers, a merchant can maintain a clean processing history on their main accounts.
This reduces the risk of account termination or the sudden imposition of a rolling reserve across the entire business.
Use cases
Multi-Vertical Marketplaces
A platform selling both physical goods and digital subscriptions can route the lower-risk retail sales to a primary acquirer, while directing the recurring digital services to a provider specialising in subscription-based risk and dunning management.
High-Risk Sector Management
Businesses operating in gaming or regulated industries can route transactions to acquirers with specific licences for those activities, ensuring compliance with local laws and reducing the frequency of issuer-level blocks.
Global Travel Operations
Travel agencies often split bookings between airlines and accommodation. Directing airline MCCs through providers with specific settlement windows helps manage the complex refund and chargeback workflows inherent to the aviation sector.
Hybrid Service Providers
Firms offering both professional services and software products can segment their traffic to ensure that the higher-value service invoices do not trigger the same fraud alerts as smaller, high-frequency software sales.
By the numbers
This reflects the typical uplift in approval rates observed by merchants moving from a single-acquirer setup to a multi-acquirer, MCC-optimised routing strategy.
An industry-standard range for savings achieved when transactions are correctly routed to qualify for sector-specific interchange categories versus generic rates.
A common reduction in false positives when transactions are routed through acquirers with specific expertise and issuer trust in high-volatility industry categories.
Related terms
Talk to our team about a live rollout on your acquiring stack.
What you get with MCC-based routing
- Direct traffic to acquirers with the highest historical approval rates for specific industry codes.
- Categorise transactions at the gateway level to apply sector-specific fraud and risk logic.
- Minimise interchange expenses by aligning transaction data with the most favourable acquirer cost structures.
- Separate high-volatility industry traffic from core business volume to protect merchant account health.
- Automate the selection of MIDs that possess specific industry licences and regulatory authorisations.
- Increase successful authorisations for cross-border transactions by using issuers familiar with specific MCCs.
- Reduce the impact of industry-wide technical outages by maintaining MCC-specific secondary routing paths.
- Identify and correct MCC mismatches that lead to elevated scheme fees or processing penalties.
- Support complex business models by managing multiple merchant category codes within a single platform.
- Facilitate more accurate financial reporting by segmenting settlement data by merchant industry classification.
A short scoping call, then a written plan for your MIDs.
Questions about MCC-based routing
How does MCC-based routing affect the final interchange rate paid by the merchant?
Interchange rates are determined by several factors, including the card type and the Merchant Category Code. Card schemes often set lower rates for specific sectors, such as utilities or charities.
By using MCC-based routing, a merchant can ensure the transaction is processed through a MID specifically registered for that category.
If a transaction is routed through a generic MID, the issuer may apply a higher rate because the specific industry qualification is not recognised, leading to increased costs for the business.
Can routing by MCC help reduce the risk of account termination or rolling reserves?
Yes. Acquirers monitor chargeback ratios and refund rates against specific MIDs.
If a merchant mixes high-risk MCC traffic with low-risk traffic, the elevated volatility of the high-risk sector could trigger a reserve or termination across the entire account. By routing different categories to separate providers, the merchant isolates the risk.
This ensures that a spike in disputes in one vertical does not jeopardise the processing capabilities of the broader business operations.
Do all acquirers support the same set of Merchant Category Codes?
No, acquirers have different risk appetites and may not be authorised or willing to process certain MCCs. Some specialised acquirers focus exclusively on high-risk categories like gaming or pharmaceuticals, while others focus on low-risk retail.
Attempting to route a controlled MCC to an acquirer without the proper permissions will result in an immediate hard decline or a breach of the merchant service agreement. Routing rules ensure each transaction finds a compliant path.
What happens if a transaction is assigned an incorrect MCC during the routing process?
If a transaction is misclassified, it may lead to a 'misuse of merchant data' fee from the card schemes. Furthermore, if the issuer perceives a mismatch between the merchant's business and the MCC, they may trigger a fraud decline.
MCC-based routing logic must be backed by accurate data to ensure that every authorisation request matches the actual nature of the sale, maintaining trust with both the acquirer and the issuer.
Is MCC-based routing compliant with PSD2 and Strong Customer Authentication requirements?
MCC-based routing is fully compatible with PSD2. In fact, specific industries may have different exemptions for Strong Customer Authentication (SCA), such as transport or parking.
Routing based on the MCC allows the payment system to apply the correct 3DS logic and seek relevant SCA exemptions, which improves the user experience at checkout while remained compliant with European regulatory standards for electronic payments.
Does this strategy require a merchant to have multiple acquirer relationships?
Typically, yes. To gain the full benefit of MCC-based routing, a merchant requires a multi-acquirer setup or a PSP that offers access to multiple backend partners.
By having several acquiring endpoints, the routing engine has the necessary destinations to send transactions based on the category code. Without at least two distinct acquirers or MIDs with different profiles, the ability to optimise based on category is restricted.
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