The fastest path is usually fixing what's already broken, not adding new tools

Most e-commerce sites lose sales and money at checkout because of friction that costs nothing to remove: a form that asks for the same address twice, a payment method that takes three extra clicks, a cart that doesn't show shipping cost until the final step. Before you buy new software, audit what you have. The sites that process payments fastest typically cut their checkout steps from five or six down to three, remove fields that aren't legally required, and show the total cost before asking for payment details.

The second-biggest lever is choosing the right payment processor for your actual sales mix. A processor that's cheap for credit cards may be expensive for digital wallets. One that handles subscriptions well may charge more per transaction for one-time sales. You need to know what percentage of your customers use each method—cards, PayPal, Apple Pay, Google Pay, bank transfers—and then compare what each processor charges for that specific mix, not just the headline rate.

Speed and cost are connected but not the same thing. A slower checkout increases cart abandonment, which costs you revenue. A cheaper processor that's slower to set up or integrate costs you time. This guide covers what to measure, how to find the right processor for your business, and the concrete steps that move the needle fastest.

Key Takeaways

  • Removing unnecessary form fields and showing the total cost before payment details typically cuts abandonment more than any other single change.
  • Payment processor fees vary by method (cards cost more than digital wallets at most processors), so compare based on your actual customer mix, not the advertised rate.
  • The time to integrate a new processor—usually two to four weeks—should be weighed against the revenue you lose during that period and the revenue you gain after.
  • Offering multiple payment methods reduces abandonment more than offering one method cheaply, so the processor you choose should support cards, wallets, and at least one alternative.
  • PCI compliance (the security standard for handling card data) is mandatory, not optional; using a processor that handles it for you costs less than managing it yourself.

Measure what's actually costing you money before you change anything

Start with three numbers: your checkout abandonment rate (the percentage of people who add items to cart but don't complete purchase), your average transaction fee as a percentage of sales, and your average time from customer checkout start to payment confirmed. You can find the first two in your payment processor's dashboard or your e-commerce platform's analytics. The third requires you to time a test purchase or ask your processor directly.

Abandonment rate is the most important. If 70 percent of your customers abandon at checkout, cutting that to 65 percent is worth more than cutting your transaction fee from 2.9 percent to 2.8 percent. Most e-commerce sites see abandonment between 60 and 75 percent; anything above 75 percent usually points to a specific friction point—a required field that doesn't explore to most customers, a payment method your customers don't use, or a shipping cost that appears too late.

Once you know your baseline, you can test changes. Remove one optional field, measure abandonment for a week, then add it back. Offer a digital wallet option (Apple Pay or Google Pay) to half your traffic and measure whether those customers abandon less. These tests cost nothing and tell you what actually moves the needle for your specific customers.

Compare processors based on your payment method mix, not the headline rate

Payment processors publish a single rate—often something like "2.9% + $0.30 per transaction"—but that's only the cost for credit and debit cards. Digital wallets (Apple Pay, Google Pay, PayPal) usually cost less. Bank transfers and local payment methods cost different amounts. If 40 percent of your customers use Apple Pay and you're comparing two processors, the one that charges 2.5 percent for Apple Pay is cheaper than the one that charges 2.9 percent for cards, even if the card rate is lower.

To compare fairly, multiply each processor's rate by the percentage of your sales that come through each method, then add them up. If your sales are 50 percent cards, 30 percent Apple Pay, 15 percent PayPal, and 5 percent bank transfer, and Processor A charges 2.9% for cards, 2.5% for Apple Pay, 2.2% for PayPal, and 1% for transfers, your blended rate is (0.50 × 2.9) + (0.30 × 2.5) + (0.15 × 2.2) + (0.05 × 1) = 2.48 percent. Do the same math for Processor B and compare the final number, not the advertised card rate.

Common processors for e-commerce include Stripe, Square, PayPal Commerce Platform, and Adyen. Each has different strengths: Stripe is fast to integrate and supports many payment methods; Square is straightforward for small businesses; PayPal Commerce Platform is cheapest if most of your customers already use PayPal; Adyen handles high volume and international payments well. Request a quote from at least two, using your actual sales mix.

Reduce checkout steps and remove fields that aren't legally required

The fastest checkout is the shortest checkout. Most e-commerce sites ask for more information than they need. You legally need the customer's name, billing address, and shipping address (if different). You do not need their phone number, company name, or apartment number as separate fields—those can be part of the address field. You do not need to ask for billing address if it's the same as shipping address; a single checkbox saves a step.

The second-biggest friction point is showing shipping cost too late. If a customer doesn't see the total cost until after they enter their address, they may abandon. Show an estimated shipping cost as soon as they enter their zip code, then confirm the exact cost before they enter payment details. Most e-commerce platforms (Shopify, WooCommerce, BigCommerce) can do this without custom code.

Digital wallets (Apple Pay, Google Pay, PayPal) skip the address entry entirely if the customer is already logged in. Offering these methods reduces checkout steps for customers who use them. If your processor doesn't support them, that's a reason to switch.

Understand PCI compliance and why it matters to your costs

PCI DSS (Payment Card Industry Data Security Standard) is a set of security rules that explore to any business that handles credit card data. If you store, process, or transmit card numbers, you must follow PCI rules or face fines and liability if data is breached. Most e-commerce sites avoid this by using a processor that handles PCI compliance for them—Stripe, Square, and PayPal all do this.

If you try to handle card data yourself to save on processor fees, you'll spend far more on compliance: annual security audits, encryption, network monitoring, and liability insurance. A PCI audit costs between $1,000 and $10,000 per year depending on your transaction volume. A data breach can cost hundreds of thousands. Using a processor that handles PCI for you is almost always cheaper than managing it yourself, even if the processor's per-transaction fee is slightly higher.

When you're comparing processors, confirm that they handle PCI compliance for you. If they don't, or if they require you to maintain your own compliance, add the cost of an annual audit to their per-transaction fee before comparing.

Test one change at a time and measure the impact before moving to the next

The temptation is to redesign your entire checkout at once—new processor, new form, new payment methods. That makes it impossible to know what actually worked. Instead, pick one change, measure abandonment for at least a week (longer if your traffic is low), then decide whether to keep it.

A typical test sequence might look like this: Week 1, remove optional fields and measure abandonment. Week 2, add a digital wallet option. Week 3, show shipping cost earlier in the process. Week 4, switch to a cheaper processor. After each change, you'll know exactly what moved the needle and what didn't.

If you're switching processors, plan for two to four weeks of integration time. Your developer will need to update your checkout code, test payment flows, and move your customer data. During this time, your checkout may be slower or temporarily unavailable. Schedule this during your lowest-traffic period if possible, and tell your customers about the change in advance.

Offer multiple payment methods, even if one costs more

A customer who can't pay with their preferred method will abandon. If you only accept cards and a customer wants to pay with PayPal, they leave. If you accept cards and PayPal but not Apple Pay, and a customer is on an iPhone, they may abandon rather than enter their card details.

The processor you choose should support at least cards, one digital wallet (Apple Pay or Google Pay), and PayPal. If your customers are international, add local methods: iDEAL in the Netherlands, Bancontact in Belgium, Alipay in China. These methods usually cost less than cards and reduce abandonment in those regions.

The cost of offering multiple methods is usually lower than the revenue you gain from reduced abandonment. A processor that charges 2.9 percent for cards but 1.5 percent for bank transfers is cheaper overall if it means 5 percent more customers complete their purchase.

Frequently Asked Questions

How much will switching processors save me?

It depends on your sales mix and current processor. If you're paying 3.5 percent and switch to 2.8 percent on $100,000 in annual sales, you save $700. But if switching takes three weeks and you lose 10 percent of sales during integration, that costs you more than you save. Calculate both the fee savings and the integration cost before deciding.

Do I need to offer Apple Pay and Google Pay if most of my customers use cards?

Not when ready, but test it. Offering Apple Pay usually reduces abandonment by 2 to 5 percent among customers on iPhones, and it costs nothing to add if your processor supports it. Start with one wallet and measure the impact before adding others.

What happens to my customer data if I switch processors?

Your processor stores payment data, not your e-commerce platform. When you switch, your old processor keeps the old data and your new processor starts fresh. You don't move customer card numbers—those stay encrypted with the old processor. You do need to update your checkout code to point to the new processor, which is why integration takes time.

Can I reduce my PCI compliance burden by storing less data?

Yes. The less card data you store, the lower your PCI requirements. If you use a processor that handles all card data and you never store card numbers yourself, you're in the lowest PCI category and may not need an annual audit. Ask your processor what PCI level you fall into based on your setup.

How do I know if my checkout is actually slow?

Time a test purchase from your own site and from a competitor's site on the same internet connection. If yours takes noticeably longer, the issue is usually form fields, shipping cost calculation, or payment processing. Ask your processor for their average authorization time (usually under one second). If it's longer, that's a processor issue worth investigating.