The best merchant services provider for your business offers transparent interchange-plus pricing, no long-term contracts, hardware that matches your business type, and responsive support when you need it. Most businesses overpay for processing because they choose providers based on advertised rates rather than total cost and service quality.
The 7 Factors That Matter
1. Pricing Model — Interchange-Plus vs Flat Rate
This is the single most important factor. There are three common pricing models:
Interchange-plus (best for most businesses): You pay the actual interchange rate set by the card networks, plus a small transparent markup. You can see exactly what you're paying and verify it independently.
Flat-rate (simple but expensive): You pay the same percentage on every transaction regardless of card type. This overpays on debit cards and underpays on premium rewards cards. The provider keeps the difference.
Tiered (worst option): Transactions are sorted into "qualified," "mid-qualified," and "non-qualified" tiers at different rates. The provider decides which tier each transaction falls into — and they always have an incentive to downgrade.
Bottom line: If your provider doesn't offer interchange-plus pricing, you're almost certainly overpaying.
2. Contract Terms — Length and Cancellation
Red flags:
- Multi-year contracts (3+ years)
- Early termination fees ($200-500+)
- Auto-renewal clauses that extend your contract
- Equipment leases disguised as purchases
What to look for:
- Month-to-month agreements
- No early termination fees
- Clear cancellation process
- Equipment purchase (not lease) options
3. Hardware Selection — POS and Terminals
Your provider should offer hardware that matches your business type — not just push their cheapest option. Key questions:
- Do they carry multiple POS brands (Clover, PAX, Aloha, etc.)?
- Can you purchase hardware outright (vs mandatory leasing)?
- Is the hardware compatible with your business workflow?
- What's included (card reader, receipt printer, cash drawer)?
4. Industry Specialization
Generic providers struggle with industries outside the mainstream. If your business is in a high-risk category (restaurants with high chargebacks, eCommerce, CBD, supplements, adult), you need a provider with specific experience in your vertical.
Questions to ask:
- How many businesses like mine do you currently serve?
- What's your approval rate for my industry?
- Do you have banking relationships that support my category?
5. Customer Support Quality
Support quality only matters when something goes wrong — and something always goes wrong eventually.
What to evaluate:
- Response time — can you reach a human quickly?
- Knowledge level — do support staff understand payment processing, or are they reading scripts?
- Dedicated account manager — do you have a single point of contact?
- Hours — is support available when you process (evenings, weekends)?
6. Chargeback and Fraud Protection
Every business faces chargebacks eventually. Your provider should offer tools to prevent and manage them:
- Early warning alerts (Ethoca, Verifi)
- Fraud screening tools
- Chargeback response support
- Billing descriptor optimization
- Dashboard monitoring for dispute patterns
7. Integration and Technology
Your processing should integrate with the tools you already use:
- POS system compatibility
- Accounting software integration (QuickBooks, Xero)
- eCommerce platform support (Shopify, WooCommerce, BigCommerce)
- CRM integration
- Reporting and analytics dashboard
- API access for custom integrations
How Unison Stacks Up
| Factor | What Unison Offers |
|---|---|
| Pricing | Interchange-plus — no bundled rates |
| Contracts | Month-to-month, no termination fees |
| Hardware | Clover, PAX, Aloha, Kwick, Poynt, Korona, + more |
| Specialization | High-risk expert (CBD, peptides, adult, gaming, + more) |
| Support | Dedicated account manager, direct phone |
| Chargeback tools | Midigator, Ethoca, Verifi integration |
| Integrations | PayTrace gateway, QuickBooks, GoHighLevel, + more |
10 Red Flags When Evaluating Providers
Before you sign anything, watch for these warning signs:
1. Won't provide a written rate quote — if they won't put rates in writing, they'll change them later 2. Quotes a rate without specifying the pricing model — "2.4%" means nothing without knowing if it's interchange-plus, flat, or tiered 3. Pushes equipment leasing — leases cost 2-4x purchase price and lock you in 4. Long-term contract with early termination fee — month-to-month should be standard 5. No clear cancellation process — if they can't explain how to cancel, it's intentionally difficult 6. "Free" terminal that requires a contract — nothing is free if it locks you in 7. Won't show you a sample statement — they're hiding fee structure complexity 8. Guarantees "lowest rates" — interchange is fixed, so no processor can guarantee the lowest total rate for every transaction 9. Pressure to sign immediately — legitimate providers don't pressure you 10. No direct phone support — email-only support is a dealbreaker when your terminal goes down on a Saturday
Questions to Ask Before Signing
Print this checklist and bring it to your provider conversation:
- What pricing model do you use? (Interchange-plus, flat rate, or tiered?)
- What is your per-transaction markup above interchange?
- Are there monthly fees? List every one.
- What is the contract length? Is it month-to-month?
- Is there an early termination fee? How much?
- Can I purchase hardware outright? What are the hardware costs?
- What POS systems do you support?
- Do you offer interchange-plus pricing for all card types?
- What chargeback prevention tools are included?
- Can I see a sample processing statement?
- How do I reach support after hours? Phone or email only?
- Do you serve businesses in my industry specifically?
Get a free comparison. Contact Unison →. Call (925) 290-6003.
Related resources:
- Merchant Services — Unison's merchant services overview
- Merchant Account Fees Explained — understand your costs
- Interchange-Plus Pricing Guide — pricing deep dive