Improving payment authorisation rates for online merchants

Online merchants often struggle with low authorisation rates, which can significantly impact revenue and customer experience.

One of the main challenges is fraud prevention measures that lead to legitimate transactions being declined. Banks and payment processors use strict security filters to detect potential fraud, but these can sometimes flag genuine purchases, frustrating customers and causing lost sales.

Another issue is outdated or incorrect customer payment details. Expired credit cards, insufficient funds, or mismatched billing information can lead to declined transactions. Merchants also face cross-border payment difficulties, where international transactions may be blocked due to differences in regulations or currency conversion issues.

Technical issues, such as payment gateway failures or slow processing times, can also reduce authorisation rates. Additionally, strong customer authentication (SCA) requirements, especially under regulations like PSD2 in Europe, can create friction in the checkout process, leading to abandoned purchases.

To combat these challenges, merchants must optimise fraud detection systems, offer a seamless checkout experience, and provide a range of Alternative Payment Methods (APMs) to improve authorisation rates and reduce transaction failures.

Payment authorisation is the process by which a payment provider (such as a bank or payment processor) verifies that a customer's payment method is valid and has sufficient funds or credit to complete a transaction.

When a customer makes a purchase online, the payment details are sent to the payment gateway, which requests approval from the issuing bank or card issuer. If the payment is authorised, the transaction proceeds. If not, it is declined, and the merchant is notified. Payment authorisation helps ensure that the transaction is legitimate and reduces the risk of fraud.

Improving payment authorisation rates is crucial for online merchants. After all, low authorisation rates can lead to significant financial losses. When legitimate transactions are declined, businesses lose out on potential sales, while customers may abandon their carts out of frustration. Repeated declines can push customers to competitors, resulting in lost revenue and lower customer lifetime value. Plus, low authorisation rates can increase operational costs, as merchants may need to invest in additional customer support to handle declined transactions and failed payment issues.

Beyond financial losses, improving authorisation rates enhances the overall customer experience and helps build trust. People expect a seamless checkout process - and frequent payment failures can create frustration and negatively impact brand perception. A smoother, more reliable payment experience increases customer satisfaction and encourages repeat purchases. When consumers know their transactions will be processed smoothly, they are more likely to return, improving retention and loyalty.

Higher authorisation rates also lead to better conversion rates, ultimately driving revenue growth. Merchants can reduce payments from being unnecessarily declined by optimising fraud detection, using intelligent payment routing, and ensuring customer details are up-to-date. This improves immediate sales and strengthens long-term customer relationships, resulting in a more sustainable and profitable business.

Not every decline has the same cause, and treating them all the same makes it harder to fix any of them. We group the reasons behind low approval rates into five categories:

Before you can fix authorisation rates, you need an honest read on where you stand. Ask yourself:

• 1. How is your approval rate calculated? Different providers measure success differently, so check what counts and what doesn't before you compare numbers.
• 2. Do you know why payments are failing? If you can't tell a technical decline from an issuer decline from a customer-driven one, you can't fix the right thing.
• 3. Which segments are underperforming? Approval rates can vary by region, currency, issuer, card type or customer segment, and averages hide that.
• 4. How much revenue are you losing? Even a small uplift in approval rate can be worth a lot when it's applied to demand you already have.
• 5. Is your provider only reporting the numbers, or improving them? Some providers tell you what happened. Fewer help you work out what to do next.

Improving payment authorisation rates is crucial for online businesses, as higher approval rates lead to increased revenue, better customer experience and stronger retention. Many factors can contribute to failed payments, including technical errors, fraud prevention measures and user mistakes. By implementing key strategies, merchants can optimise their payment processes and reduce unnecessary declines.

A well-integrated payment gateway ensures smooth and reliable transaction processing. Merchants should work with a payment provider that supports a wide range of payment methods and currencies, allowing them to cater to international customers and reduce declines due to incompatibility.

Additionally, link text can help businesses route transactions through the most efficient networks, improving success rates. Smart routing can also redirect payments through the issuer most likely to approve the transaction, further optimising authorisation rates.

We've seen this play out directly: a review of one merchant's integration uncovered a handful of avoidable issues, and fixing them lifted their approval rate from 72.9% to 93.9%.

A poorly designed checkout experience can lead to mistakes when customers enter their payment details, increasing the likelihood of declines. Working with a provider that offers a fully customisable hosted payments page allows businesses to create a seamless, user-friendly checkout process.

This includes features such as clear error messages, autofill options, and real-time validation of card details to reduce entry errors. Following the rules of payment page design and removing unnecessary steps can make the payment process smoother, improving completion rates and reducing abandonment.

While fraud prevention is essential, overly aggressive fraud filters can mistakenly block legitimate transactions. Implementing tools such as 3D Secure 2.0 and machine learning-based fraud detection helps balance security with a smooth payment experience.

Machine learning algorithms analyse transaction patterns in real-time, distinguishing between genuine and fraudulent payments more accurately. This reduces false positives, ensuring that valid transactions are not unnecessarily declined while still preventing fraudulent activity.

With mobile commerce on the rise, a mobile-optimised checkout experience is essential. Many declines occur due to poor mobile payment experiences, where forms are not properly formatted for smaller screens or take too long to load.

Making sure that payment pages are responsive, easy to navigate and support one-click payments can significantly improve authorisation rates. Offering mobile payments such as Apple Pay and Google Pay also provides a frictionless payment experience, reducing the likelihood of transaction failures.

Customers have diverse payment preferences, and offering multiple payment methods increases the chances of a successful transaction. Some may prefer using credit or debit cards, while others might opt for Buy Now, Pay Later (BNPL), open banking, or digital wallets.

By providing a variety of options, merchants can accommodate different customer preferences and reduce payment failures caused by unsupported payment methods. Plus, certain regions have preferred local payment methods, so adapting payment options to specific markets can enhance authorisation rates for cross-border transactions.

Not all failed payments are permanent; some are caused by temporary issues - such as insufficient funds or a brief network disruption. Implementing an automated retry system allows merchants to reattempt transactions after a short delay, increasing the chances of approval. Smart retry logic can consider factors such as the time of day, previous transaction history and the customer's issuing bank to determine the best time to retry the payment, minimising unnecessary declines.

Regularly analysing payment decline data can help identify patterns and areas for improvement. Businesses should track decline reasons, such as fraud triggers, expired cards, or technical failures, and adjust their payment processes accordingly. Using analytics tools, merchants can optimise fraud detection settings, refine their payment routing strategies, and proactively address common decline reasons.

By continuously monitoring performance, businesses can fine-tune their payment processes and improve overall authorisation rates.

A detailed review of authentication flow uncovered a technical issue that had been quietly costing approvals. Resolving it took the merchant's approval rate from around 64% to 72%.

Tokenization replaces sensitive card details with unique digital identifiers (tokens), making transactions more secure and reducing the risk of fraud.

Network tokens are unique digital identifiers used to supply symbolic placeholder data instead of the 16-digit primary account number (PAN) and remain the same when the card is replaced. For example, should a consumer report their card lost or stolen, the card issuer simply updates the token - also updating it on the merchant's system as the “card on file”. This means the shopper does not have to enter any details from the new card, as they have already been updated.

Knowing your approval rate matters, but a number on a dashboard doesn't fix a broken authentication flow, a fraud rule blocking good customers, or an integration issue you didn't know existed.

That's why our Merchant Performance Optimisation team digs into your data, finds the causes behind your declines, and works with you to fix them.

Contact our team of experts and let’s chat about how we can help you improve your authorisation rate and boost your online sales.

Update note: This article was reviewed and updated on 22 September 2026 to provide a clearer framework for diagnosing low payment authorisation rates, add practical questions merchants can use to assess payment performance, include real-world approval-rate improvement examples, and explain how Ecommpay’s Merchant Performance Optimisation team can help identify and address the causes of payment declines.