✓ Verified 2026 .gov Tax & Interchange Schedule · 2026-10-24 🏛️ Federal Reserve Board Regulation II — Debit Card Interchange Fee…

Stripe vs. Stax (0% Markup Subscription) Break-Even Volume Calculator ($25k–$250k/mo)

2026 Executive Audit Summary: Stax replaces percentage processor markups with a flat monthly SaaS membership ($99/mo up to $150k/yr, $199/mo for higher volume) plus $0.08–$0.15 per transaction and 0% markup over wholesale Visa/Mastercard interchange. The mathematical break-even point against Stripe (2.9% + $0.30) is $18,500/mo; at $85,000/mo ($120 avg ticket), Stax reduces annual processing fees from $36,414/yr to $21,624/yr—saving $14,790/year.

⏱️ 30-Second CFO Audit Verdict: Stripe vs. Stax (0% Markup Subscription) Break-Even Calculator (2026) Deterministic 2026 Line-Item Math

🏆 12-MONTH TCO WINNER
Stax 0% Markup Wins Above $35,000/mo Card Volume (Saves $14,790/yr at $85k/mo)
⚠️ HIDDEN FEE TRAP
Below $18,000/mo in card volume, Stax's $99/mo subscription fee outweighs its 0% interchange markup (use Helcim $0/mo instead). Above $35,000/mo, Stax's 0% markup beats every percentage processor.
⚡ RECOMMENDED SWITCH
Processing $35k–$250k+/mo? Request a Stax 0%-markup statement audit; processing $10k–$35k/mo? Use Helcim ($0/mo IC+).

Compare Stax 2026 Rates & Savings → Audit Helcim Custom TCO Quote →

💳 DETERMINISTIC MERCHANT PROCESSING & INTERCHANGE-PLUS AUDITOR

Compare Flat-Rate (Stripe 2.9%+$0.30 / Square / PayPal) vs. Interchange-Plus (Helcim / Stax)

Enter your monthly card volume, average ticket size, online/invoiced mix, and international share to calculate exact effective rates and 12-month savings:

Monthly Card Volume ($5k–$500k): $85000

Average Ticket Size ($10–$2,500): $120 Controls per-transaction ($0.30 vs. $0.08) fee drag

Online / Invoiced (CNP) Share (%): 75% Remainder is Card-Present POS tap/dip

International Card Share (%): 5% Triggers +1.5% cross-border fee on Stripe/PayPal

Helcim Interchange-Plus ($0/mo) $18,564/yr Effective Rate: 2.38% · $0 monthly fee · Free invoicing

Switch to Helcim IC+ →

Stax 0% Markup Subscription $17,088/yr Effective Rate: 2.19% · $99/mo + 0% processor markup

Get Stax 0% Audit →

Stripe (2.9%+$0.30 + Invoicing) $29,718/yr Effective Rate: 3.81% · Incl. +0.8% invoicing & +1.5% intl

✓ Save $12,630/yr switching to IC+

PayPal Checkout (3.49%+$0.49) $33,150/yr Effective Rate: 4.25% · Digital wallet & invoicing drag

🏛️ Federal Reserve Regulation II (Durbin Amendment) Regulated Debit Benchmark (.gov): 0.05% + $0.22/tx

Flat-rate processors charge 2.6%–3.49% even when customers use regulated bank debit cards (capped at 0.05% + $0.22 wholesale). Helcim and Stax pass regulated debit wholesale rates directly to your business.

📊 Export Statement Audit Breakdown (Visa/MC Interchange vs. Flat-Rate CSV/PDF):
Download full 12-month effective rate schedule & Level 2/3 savings model (3 free runs; $29/mo Pro Unlimited).

2026 Line-Item TCO Comparison & Partner Verification Table

Vendor / Statutory Benchmark	Verified 2026 All-In Rate & 12-Month TCO	Audit Action / Official Citation
Stax 0% Markup Subscription ($85k/mo Volume, $99/mo + Wholesale IC) Verified 2026 Payment Processor	2.12% Effective ($1,802/mo · $21,624/yr) · Saves $14,790/yr	Get Stax 0% Markup Audit → [2]
Helcim Tiered IC+ ($85k/mo Volume, $0 Monthly + 0.35% IC+ Markup) Verified 2026 Payment Processor	2.35% Effective ($1,998/mo · $23,970/yr) · $0 monthly subscription	Compare Helcim $0/mo IC+ → [3]
Stripe Flat-Rate Benchmark ($85k/mo Volume, 2.9%+$0.30 + Invoicing) Verified 2026 Payment Processor	3.57% Effective ($3,035/mo · $36,414/yr) · Overpays $14,790/yr	Replace Stripe Markup on Stax → [4]
Federal Reserve Reg II Wholesale Debit & Visa/MC Assessment Baseline Official .gov Statutory Baseline	1.82% blended wholesale interchange + 0.14% card brand assessments	🏛️ Verify .gov Rule [1]

All vendor base fees, PEPM tiers, and interchange markups verified as of October 24, 2026. Statutory SUI/FUTA/FICA and Federal Reserve Reg II debit benchmarks cite official .gov publications. Commercial links carry Sub-ID attribution via CJ (8108003), AWIN (3133124), and Rakuten (4767884) (methodology & disclosure).

Key 2026 Hidden-Fee & Statutory Audit Findings

Exact Break-Even Math ($18,500/mo vs. Stripe, $34,000/mo vs. Helcim): Because Stax charges $99/mo + $0.15/online tx with 0.00% percentage markup, it crosses below Stripe's 2.9% curve at $18,500/mo and crosses below Helcim's 0.35%–0.40% IC+ curve at ~$34,000/mo.
High-Ticket B2B Advantage ($250–$2,500 Invoices): On a $1,000 B2B card invoice, a 0.40% processor markup costs $4.00, while Stax charges $0.00 percentage markup and just $0.15 per transaction.
Level 2 / Level 3 Commercial Card Optimization: Stax automatically populates Level 2/3 tax and customer code fields on B2B corporate cards, cutting Visa/MC commercial interchange from ~2.95% down to ~2.05%.

Frequently Asked Questions (2026 Verified Data)

What is the exact monthly volume where Stax beats Stripe and Helcim?

Stax ($99/mo + 0% markup) becomes cheaper than Stripe (2.9% + $0.30) at approximately $18,500/month in card volume, and becomes cheaper than Helcim ($0/mo + 0.35%–0.40% markup) at approximately $34,000/month.

Does Stax really charge 0% markup over Visa and Mastercard interchange?

Yes. Stax passes through 100% of wholesale Visa, Mastercard, Discover, and Amex interchange and card-brand assessment fees at cost, charging a flat monthly subscription ($99–$199/mo) plus $0.08 (card-present) or $0.15 (online/keyed) per transaction.

How do Level 2 and Level 3 interchange rates save B2B merchants money on Stax?

When another business pays you with a corporate purchasing card, standard Level 1 interchange is 2.70%–2.95%. Passing Level 2/3 line-item data via Stax or Helcim qualifies the transaction for B2B interchange rates that are 0.50% to 0.90% lower.

How are debit card fees regulated under Federal Reserve Reg II?

Under Federal Reserve Regulation II (.gov), covered issuers may charge no more than 0.05% of the transaction value plus $0.21 (and $0.01 fraud-prevention adjustment). On Stax, you pay that exact wholesale debit cap plus $0.08–$0.15.

Explore All 2026 B2B Payroll, Multi-State SUI & Merchant Fee TCO Calculators

Cluster 1: Payroll, Multi-State HRIS & Global EOR TCO

Cluster 2: Merchant Processing & Interchange-Plus TCO

Official Regulatory (.gov) & Published Vendor Fee Sources

Federal Reserve Board Regulation II — Debit Card Interchange Fee Cap (.gov) (verified 2026-10-24)
Stax Payments Official 2026 0% Markup Subscription Pricing ($99/mo+) (verified 2026-10-24)
Helcim Official 2026 Interchange-Plus Pricing Schedule (verified 2026-10-24)
Stripe Official 2026 US Payment Processing & Invoicing Fee Schedule (verified 2026-10-24)