Peptide payment processing
Get a merchant-account review that considers your products, website, and fulfillment, with direct help preparing your application.
Account approval is subject to underwriting.
Merchant Services & Payment ProcessingFull-service payments,
Full-service payments,
handled in-house.
From high-risk to small business, Group ISO approves, services, and maintains credit card processing under one roof — no outsourcing. Trusted as a registered FSP & ISO for over 20 years.
In-house underwriting · 24-hour funding · Support in 30+ languages
20+ Years
Registered FSP & ISO
In-House
Underwriting & risk
Level 3
Commercial card processing
Mon–Fri
Support 7:30 AM–5:00 PM PST
Peptide payments and LegitScript application help
Explore research-focused payment processing or hands-on certification assistance for qualifying healthcare businesses.
LegitScript application help
Work with Group ISO to complete forms, organize supporting documents, and respond to follow-up requests.
LegitScript independently decides certification.
Comprehensive payment solutions
One provider for every way you get paid
Secure, reliable, and integrated merchant services built for businesses of every size and risk profile.
In-house credit card processing
We approve, service, and maintain your merchant account under one roof — from low-risk retail to complex high-risk accounts. No third-party hand-offs.
Learn more about In-house credit card processing
ERP-integrated payments
Connect payments directly into QuickBooks, Sage, NetSuite, and Microsoft Dynamics so reconciliation and reporting stay automatic.
Learn more about ERP-integrated payments
Level 3 Processing and CEDP
Support commercial and government card transactions with detailed line-item data through Level 3 processing and CEDP.
Learn more about Level 3 Processing and CEDP
Card-not-present & recurring billing
Accept payments online, over the phone, and by mail with a secure virtual terminal, recurring billing, and PCI-compliant tokenization.
Learn more about Card-not-present & recurring billing
How it works
Up and running in three steps
1
Apply online
Fill out a short online application — no long forms or hidden steps.
2
Receive an instant quote
Our in-house team reviews and delivers a tailored quote fast.
3
Start accepting payments
Go live with terminals, gateways, and integrations built for you.
Built for your industry
Processing for low, medium & high-risk businesses
In-house underwriting means we can approve and support accounts other providers turn away.
Why Group ISO
A merchant services partner, not a middleman
Because we own the entire process, we approve faster, resolve issues directly, and support your business long after the first transaction.
- Reliable, secure credit card processing and merchant services
- Everything handled in-house — support, risk, and underwriting
- Level 3 processing and CEDP with 24-hour funding for B2B
- Customer service in over 30 languages, Monday to Friday, 7:30 AM to 5:00 PM PST
- Competitive, transparent pricing designed around your business
Integrations
Works with the tools you already run
Our system integrates with your existing ecosystem. Don't see yours? We'll build the connection.
+ many more
Merchant testimonials
Trusted by merchants for the long haul
Google reviews
5 out of 5 on Google
“So happy to finally leave a review. Paul Carr has been very consistent and attentive when informing me about his products. Paul explained the benefits and services.”
Drea Noahh
View on Google, Drea Noahh's reviews (opens in a new tab)5 out of 5 on Google
“Worked with Paul to gather information about their services and how they would benefit my company. After a lot of research (and hesitation), we decided to go with Group ISO. Glad we did!”
Lester Rhee
View on Google, Lester Rhee's reviews (opens in a new tab)Testimonials shared with Group ISO
“Group ISO has been a fantastic addition to Mesa Garage Doors. Not only have we saved money but the personalized service is second to none. It is nice to have a credit card company that continually works with us and maintains its customer service years after the first transaction. I have and will continue to recommend Group ISO.”
Dwight C. Esnard
President of Mesa Garage Doors
“I've been w/ Group ISO for years, and I highly recommend them. Their customer service is stellar. There responsiveness is on point. I have certainty that my team can always reach a knowledgeable Group ISO team member for any question or request. As my business grows, Group ISO continues to grow alongside w/ us. Thank you Rosalyn, Will and team for being an awesome extension of my business.”
Niurka
Founder & CEO of Niurka Inc.
“I have been with Group ISO for over 2 yrs now and am very pleased with their service. They are very courteous and helpful when I call. I highly recommend this service.”
Isabella Stoloff
Founder of Orange County Healing Center
FAQ
Payment processing questions
Your quote depends on your business, sales volume, average transaction size, payment methods, and underwriting review. Compare the total cost, not just the advertised transaction rate. Request a written breakdown of any monthly, gateway, equipment, PCI-related, and chargeback fees, along with the contract length, renewal terms, and any cancellation charges.
Group ISO works with retail, ecommerce, restaurants, small businesses, and high-risk industries. Tell us what you sell, where you operate, and how customers pay so we can review the fit. Eligibility depends on your products or services, business details, and underwriting requirements. Being in a supported industry does not guarantee approval.
Have your business and ownership details, banking information, and recent processing statements ready if you already accept cards. Be prepared to explain your sales volume, average transaction size, and refund or chargeback history. Depending on your business, underwriting may also request licenses, financial records, or website policies. Your consultant will confirm the documents needed and how to submit them securely.
Timing depends on a complete application, your business type, and underwriting review. Missing documents or questions about your products or website can extend the process. After approval, your equipment, gateway, or software integration must be configured and tested. Ask your consultant for an expected timeline for your application and setup. Approval and a specific launch date are not guaranteed.
That depends on your terminal, POS system, gateway, and software compatibility. Share the model names and platform details before making a change. Review your current provider's cancellation terms and any separate equipment lease. Confirm the new setup and test payments before closing your existing account; do not assume every device or integration can transfer.
Group ISO offers retail payment equipment, ecommerce gateways, and virtual terminals for phone or mail orders, along with recurring billing options. The right setup depends on how you sell and which payment methods your account is approved to accept. Tell your consultant about each sales channel and any subscription needs so compatibility and account terms can be confirmed.
Your funding schedule and any reserve or hold depend on underwriting and your account terms. Before accepting an offer, request the deposit schedule, processing cutoffs, and any reserve amount and release conditions in writing. Confirm how weekends and bank holidays affect deposits. Do not assume that every account includes next-day funding or has no reserve.
Group ISO offers payment integrations for systems such as QuickBooks, Sage, NetSuite, and Microsoft Dynamics GP. Share your software version and payment workflow so compatibility and setup requirements can be confirmed before you commit. An integration should fit how your team takes payments, records transactions, and reconciles accounts.
Level 3 processing captures detailed order and line-item data for eligible commercial and government card transactions. CEDP provides another enhanced-data path for eligible commercial transactions. Qualification and savings depend on the card, transaction, program, and merchant setup.
Group ISO's in-house support team is available Monday to Friday, 7:30 AM to 5:00 PM PST. Call (800) 960-0135 for help with your payment setup or merchant account. During onboarding, confirm the support process for your equipment, gateway, and integrations so you know who to contact when an issue affects your business.
