Smart payment routing
Smart payment routing directs transactions to the most appropriate acquirer or gateway based on predefined rules. This strategy considers factors like cost, success rates, and regional preferences to maximise approval rates and minimise processing fees.
It ensures each transaction follows the optimal path for completion.
- Category
- Routing
- Capabilities
- 10
- Available on
- All plans
The overview
Smart payment routing functions as a logic layer between the merchant gateway and the global network of acquirers. By decoupling the checkout process from a single processor, a merchant can direct traffic based on real-time data and predetermined criteria.
The system evaluates every transaction authorisation request against a set of variables, such as the cardholder bank, geographic region, and the specific Merchant Category Code.
The objective is to match each payment with the acquirer most likely to grant an authorisation while keeping scheme fees and interchange costs low. In a multi-acquirer setup, this layer acts as an optimiser that mitigates the risk of a single point of failure.
If one terminal identification number or processing bank experiences downtime or a latency spike, the routing engine identifies the issue and redirects the volume to a healthy alternative. This structural redundancy is standard for high-volume traders who must maintain high availability across diverse jurisdictions.
How it works
Transaction data analysis
The routing engine first parses the incoming transaction packet. It extracts the Bank Identification Number, the transaction value, and the merchant identification data.
This stage identifies if the card is a local debit card or an international credit card, which dictates the most cost-effective path for the authorisation request.
Rule engine evaluation
The system applies merchant-defined logic to the transaction data. These rules may prioritise an acquirer with a domestic licence to avoid cross-border fees or select a processor known for higher success rates with specific MCCs.
The engine compares these parameters against its active integrations to determine the optimal destination.
Dynamic gateway selection
Once the path is determined, the payload is securely forwarded to the chosen acquirer or Payment Service Provider. The routing occurs in milliseconds, ensuring that there is no impact on the customer checkout experience.
The engine manages the API communication and protocol translation required for different processing centres.
Secondary failover attempt
If the primary acquirer returns a soft decline or experiences a technical timeout, the smart routing logic can instantly trigger a retry through a secondary processor.
This automated representment happens behind the scenes, potentially recovering a sale that would otherwise have been lost to a technical refusal.
Why it matters
Authorisation rate optimisation
Approval rates fluctuate between acquirers for the same card type or region. By routing transactions to the processor with the strongest historical performance for a specific BIN or currency, merchants can realise higher conversion rates.
This reduces the number of legitimate customers who face incorrect declines, directly protecting the bottom line without increasing the risk of fraudulent activity.
Reduction in processing overheads
Different acquirers offer varying fee structures based on geography and transaction volume. Smart routing allows a business to prioritise the lowest-cost path for every transaction.
By avoiding unnecessary cross-border interchange fees and utilising local acquisition where possible, a merchant can noticeably decrease their blended processing costs and improve overall margin on high-volume digital sales.
Operational resilience and redundancy
Relying on a single merchant service provider introduces significant systemic risk. Technical outages or service maintenance can halt all revenue flow.
A multi-processor routing strategy ensures that if one gateway is unresponsive, traffic is automatically shifted to a functional alternative. This redundancy is critical for maintaining consistent service levels and meeting internal performance benchmarks for system uptime.
Use cases
Global e-commerce expansion
A retailer selling in both the UK and the US can route European transactions through a domestic acquirer to comply with PSD2 requirements while sending American traffic to a US-based processor to avoid high cross-border scheme fees.
High-volume subscription services
Recurring billing platforms can use routing to manage monthly renewals. If a primary acquirer declines a subscription payment, the system automatically retries the transaction through a backup partner, reducing involuntary churn and improving renewal success.
Mitigating processor outages
During peak sales periods like Black Friday, a merchant can distribute load across three different gateways. If one processor slows down under heavy volume, the router shifts new transactions to the more responsive partners.
Managing card-specific costs
Business and premium credit cards often carry higher interchange fees. A merchant can set rules to route these specific BINS to an acquirer with a preferential rate for corporate cards, minimising the total cost of acceptance.
By the numbers
This range is typical for merchants moving from a single acquirer to an optimised multi-acquirer routing setup, though results vary by industry and region.
The industry-standard time for a routing engine to parse data and select an optimal path before forwarding the authorisation request to the processor.
Potential savings on transaction fees when effectively routing domestic traffic to local acquirers and avoiding unnecessary cross-border interchange surcharges.
Related terms
Talk to our team about a live rollout on your acquiring stack.
What you get with Smart payment routing
- Dynamic selection of acquirers based on real-time success rates for specific bank identification numbers
- Automated redirection of traffic during processor downtime to ensure continuous authorisation capabilities for merchants
- Geographic routing to local processors to minimise cross-border interchange rates and regional scheme fees
- Load balancing across multiple merchant identification numbers to stay within volume caps and processing limits
- Intelligent retries for soft declines without requiring the cardholder to re-enter their payment details
- Customisable rule sets for different merchant category codes to align with specific risk appetites
- Integration with multiple payment gateways to prevent vendor lock-in and provide greater pricing leverage
- Support for Strong Customer Authentication by routing to 3DS-compliant processors according to regional regulations
- Analysis of decline reasons to determine if a transaction should be re-routed or permanently refused
- Prioritisation of local payment methods for specific jurisdictions to improve regional customer conversion rates
A short scoping call, then a written plan for your MIDs.
Questions about Smart payment routing
How does smart routing impact the speed of the checkout process for customers?
The evaluation of routing rules and the subsequent selection of an acquirer typically occur in under 100 milliseconds. While the transaction must still travel to the issuer for authorisation, the routing layer adds negligible latency.
This delay is usually outweighed by the benefit of a higher approval probability, as a failed transaction followed by a manual retry would take significantly longer and result in a worse customer experience.
Can smart routing help in reducing the occurrence of soft declines during authorisation?
Yes, smart routing addresses soft declines by identifying the root cause, such as temporary technical issues or aggressive fraud filters at the issuer level.
By re-routing these transactions to a processor with a different reputation or technical profile, the merchant can often bypass the specific trigger that caused the initial refusal.
This automated retry mechanism is a standard method for reclaiming revenue that might otherwise be lost to false positives.
Is it necessary to have multiple merchant accounts to implement a routing strategy?
To fully utilise smart routing, a merchant generally needs agreements with more than one acquirer or PSP. Each acquirer provides a unique Merchant Identification Number (MID).
The routing engine then manages these MIDs, deciding which one is best suited for an individual transaction. While a single-acquirer setup can use routing for different internal terminals, the primary benefits of cost reduction and redundancy require a multi-acquirer infrastructure.
Does routing logic take into account the cost of interchange and scheme fees?
Advanced routing engines allow merchants to input their fee structures for each processor. The system can then prioritise routes that result in the lowest cost for the specific card type presented.
For example, it can steer domestic debit cards toward processors with the lowest per-transaction fees, while routing international credit cards through acquirers that offer better rates on cross-border interchange and currency conversion.
How does this technology handle compliance with regional regulations like PSD2 and SCA?
Smart routing can be configured to recognise transactions that fall under specific regulatory regimes, such as the Strong Customer Authentication requirements in Europe. The engine ensures that these payments are directed to acquirers and gateways that fully support the latest 3D Secure protocols.
This prevents transactions from being declined due to a lack of proper authentication headers, which is a common issue when using non-compliant legacy routes.
Can merchants set specific rules for high-value transactions to manage risk?
Merchants can define rules based on the transaction value or the risk profile associated with certain card types. For high-value orders, the engine might route the payment through a processor with more robust fraud-checking tools or one that requires mandatory 3DS.
This allows the business to apply stricter scrutiny to larger transactions while maintaining a frictionless flow for smaller, low-risk purchases.
What happens if all connected acquirers are experiencing technical issues simultaneously?
While rare, if all configured acquirers are unavailable, the routing engine will typically return a standard system error to the merchant's checkout. However, the probability of such an event is significantly lower than a single-processor outage.
Most systems include heartbeat monitoring to check the status of each connection, allowing the merchant to be alerted immediately if the entire processing stack is compromised.
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