What is Smart Routing?

What Is Smart Routing?

Smart routing -- sometimes called intelligent routing or dynamic routing -- is a payment technology that automatically directs each transaction to the payment processor or acquirer most likely to approve it, at the lowest cost, with the fastest processing time. Instead of sending every transaction through a single payment provider, smart routing evaluates multiple factors in real time and chooses the optimal path for each individual payment.

Think of it like a sat-nav for your payments. Just as a sat-nav considers traffic, road closures, and distance to find the best route to your destination, smart routing considers approval rates, processing fees, currency, card type, and processor availability to find the best route for each transaction.

How Smart Routing Works

Smart routing sits in the payment orchestration layer -- the middleware between a merchant's systems and the various payment processors they work with. When a payment is submitted, the routing engine evaluates it against a set of rules, data, and algorithms before deciding where to send it.

The Decision Process

When a transaction arrives, the routing engine considers factors like:

• Which processor has the highest approval rate for this type of card, in this currency, from this issuing bank?
• Which processor offers the lowest fees for this transaction amount and card type?
• Is the preferred processor currently available, or is it experiencing downtime or slow response times?
• Does this transaction involve a currency or country that requires a specific processor?
• Are there any regulatory requirements that dictate where this transaction must be processed?

Based on this analysis, the routing engine sends the transaction to the optimal processor. If that processor declines the transaction or fails to respond, the engine can automatically cascade to the next best option, retrying the payment through an alternative processor without the customer needing to do anything.

Rules-Based vs Machine Learning

Early smart routing systems relied on static rules -- for example, "send all Visa transactions to Processor A and all Mastercard transactions to Processor B." While better than using a single processor for everything, rules-based routing is limited because it cannot adapt to changing conditions.

Modern smart routing uses machine learning to continuously analyse transaction outcomes and optimise routing decisions. The system learns from every transaction -- successful and failed -- and adjusts its routing logic accordingly. If Processor A's approval rate for international Visa cards drops on Tuesday afternoons, the system will notice the pattern and start routing those transactions to Processor B during that window.

Failover and Cascading

One of the most valuable features of smart routing is automatic failover. If a transaction is declined by the first processor, the routing engine can instantly resend it to a different processor. This cascading approach can significantly improve overall approval rates because a decline from one processor does not necessarily mean the transaction is invalid -- different processors have different risk models, and one processor's decline may be another's approval.

However, cascading needs to be implemented carefully. Retrying a transaction that was declined for fraud reasons at a different processor is not appropriate, and sending too many retries can trigger alerts from the card networks. Good smart routing systems distinguish between declines that should be retried and those that should not.

Why Smart Routing Matters for Businesses

Higher Approval Rates

This is the primary benefit. Even a small improvement in approval rates translates directly to increased revenue. If a business processes ten thousand transactions per month and smart routing improves the approval rate by 2 percentage points, that is two hundred additional successful payments each month. At an average transaction value of fifty pounds, that is ten thousand pounds in recovered revenue every month.

Lower Processing Costs

Different processors charge different rates for different types of transactions. Smart routing can direct each payment to the cheapest processor that still offers a high probability of approval. For businesses processing high volumes, the cost savings from optimised routing can be significant.

Improved Reliability

Relying on a single payment processor creates a single point of failure. If that processor goes down, no payments can be processed until it comes back. Smart routing across multiple processors provides redundancy -- if one processor is unavailable, transactions automatically flow to an alternative.

Better International Coverage

For businesses that accept payments from customers in multiple countries, smart routing can direct transactions to processors that specialise in specific regions or currencies. A local processor in the customer's country is more likely to approve the transaction and will usually offer better exchange rates.

Smart Routing and Telephone Payments

Smart routing is just as relevant to telephone payments as it is to online payments. When a customer pays over the phone, the transaction is processed through a payment gateway just like any other card-not-present transaction. The routing engine can optimise these transactions in the same way.

Improving Phone Payment Approval Rates

Telephone payments already face higher decline rates than in-person payments because they are card-not-present transactions, which carry higher fraud risk in the eyes of issuing banks. Smart routing can help mitigate this by directing phone payments to processors that have better approval rates for card-not-present transactions, or to processors that have specific optimisations for MOTO (mail order / telephone order) payments.

Handling Agent-Assisted Payments

In a contact centre environment, a declined payment means the agent needs to explain the situation to the customer and potentially try again. This wastes time and creates a poor customer experience. With smart routing and automatic cascading, if the first processor declines the transaction, it is automatically retried through an alternative processor -- often within seconds. The customer and agent may never even know the first attempt failed.

Multi-Currency Phone Payments

Businesses that take phone payments from international customers benefit from smart routing's ability to direct transactions to processors with the best rates for each currency. This reduces conversion costs and improves approval rates for cross-border transactions.

Practical Considerations

Multiple Processor Relationships

Smart routing only works if you have relationships with multiple payment processors. Setting up and maintaining these relationships involves contracts, technical integrations, and ongoing management. The benefits need to outweigh the additional complexity.

Transaction Volume

Smart routing delivers the most value at scale. If you process a small number of transactions each month, the improvement in approval rates and cost savings may not justify the additional complexity. Businesses processing thousands of transactions monthly will see the biggest impact.

Data and Reporting

To get the most from smart routing, you need visibility into how transactions are being routed and how each processor is performing. Look for routing solutions that provide detailed analytics on approval rates, costs, and routing decisions.

Compliance Across Processors

Every processor you route transactions to must meet the same security and compliance standards. For telephone payments, this means ensuring that all processors in your routing chain support the same level of PCI DSS compliance and that cardholder data is protected regardless of which processor handles the transaction.