Picking the wrong payment processor can drain your margins, frustrate customers, and leave you locked into unfavorable contracts. The right one streamlines transactions, reduces fraud risk, and scales with your business. Here's how to evaluate and compare processors so you find the best fit for your needs.
1. Transaction Fees and Pricing Structure
Payment processors charge fees in different ways, and these add up quickly. Most use a combination of:
- Interchange-plus pricing: You pay Visa/Mastercard's base rate plus the processor's markup (typically 0.3–0.5%). Most transparent option.
- Tiered pricing: Rates vary by card type (qualified, mid-qualified, non-qualified). Easier to understand upfront but often more expensive.
- Flat-rate pricing: One fixed percentage for all cards (usually 2.5–3.5% + $0.30 per transaction). Good for predictability; bad if you process many premium cards.
Ask processors for a pricing breakdown based on your average transaction size and card mix. A 0.1% difference on high volume can mean thousands annually.
2. Setup and Monthly Costs Beyond Transactions
Transaction fees aren't the whole picture. Compare:
- Monthly minimums: Some processors charge $25–$100/month regardless of volume; others have none.
- Setup fees: Range from $0–$500, often waived for larger businesses.
- PCI compliance fees: Usually $10–$50/month if they handle compliance or you need Level 1 DSS.
- Batch fees, statement fees, terminal rental: These nickels-and-dimes add 5–15% to your real cost.
Request a 12-month cost projection based on your estimated volume. A processor with low transaction fees but high monthly costs might be more expensive overall.
3. Payment Methods Supported
Your customers expect multiple ways to pay. Ensure the processor handles:
- Credit and debit cards (Visa, Mastercard, Amex, Discover)
- Digital wallets (Apple Pay, Google Pay, PayPal)
- ACH/bank transfers (if you're B2B or subscription-based)
- Buy Now, Pay Later (Afterpay, Klarna, etc.)
- International cards or currencies (if you sell globally)
If you're in e-commerce, mobile-first, or omnichannel retail, check whether they support point-of-sale, online checkout, invoicing, and virtual terminals without additional integrations.
4. Integration and Technical Requirements
A processor that doesn't plug smoothly into your existing systems wastes implementation time and money. Ask:
- Native integrations: Do they connect directly to your e-commerce platform (Shopify, WooCommerce, BigCommerce) or accounting software (QuickBooks, Xero)?
- API availability: If you need custom integration, is their API documented and supported?
- Setup timeline: Most standard integrations take 2–7 days; custom builds can take 4–8 weeks.
- Support level: Do they offer dedicated onboarding for mid-to-large merchants, or is it self-serve?
Cheap processors sometimes require expensive custom development to integrate properly. Factor in implementation costs when comparing total value.
5. Security, Compliance, and Fraud Protection
Payment card data is sensitive. Verify:
- PCI DSS certification: Level 1 (highest security standard) is ideal; Level 2–4 may be acceptable depending on your volume.
- Fraud tools: Real-time detection, velocity checks, AVS/CVV verification, chargeback management.
- Data protection: Are they SOC 2 Type II certified? Do they use tokenization and encryption?
- Dispute resolution: What's their chargeback rate, and do they provide tools to fight false chargebacks?
High fraud rates mean higher reserves held against future chargebacks. Ask about their average chargeback rate and how it compares to industry standards (typically 0.1%).
6. Customer Support and Contract Terms
When something breaks on a Friday night, support matters. Check:
- Availability: 24/7 phone support vs. email-only matters for high-volume merchants.
- Response times: SLAs (service-level agreements) for critical issues should be under 2 hours.
- Contract length: Monthly-to-month is flexible; 2–3 year contracts lock you in but often offer discounts.
- Exit fees: Some processors charge $300–$1,000 to leave. Confirm cancellation terms before signing.
Read reviews on independent sites and ask the processor for references from businesses similar to yours.
Frequently Asked Questions
Q: What's a typical chargeback rate, and should I worry about it? A: Industry average is 0.05–0.1% of transactions. If yours exceeds 1%, your processor may increase reserves or terminate your account. Monitor and dispute false chargebacks aggressively.
Q: Can I switch processors without losing transaction history? A: Yes, but some processors hold data in proprietary formats. Request a data export during onboarding, and confirm your new processor can import historical records if needed for reconciliation.
Q: Should I use my bank or a third-party processor? A: Banks often charge higher fees but offer relationship perks. Third-party processors (Square, Stripe, Clover) are typically cheaper and more flexible. Compare both before deciding.
Use Mercoly to compare trusted Payment Processing & Merchant Services providers side-by-side and find the one that matches your business needs, timeline, and budget.