field notes 2026-04-18 8 min read the multiflow desk

Free Stripe vs interchange-plus comparison tool

3-minute scan
  • Stripe vs IC+ cost comparison Projects annual cost under Stripe flat-rate vs a typical IC+ contract at your volume tier.
  • Monthly volume $ Avg ticket $ International % Use Stripe Billing?NoYes (+0.5%) Chargebacks/mo CompareWhen Stripe is cheaper and when IC+ is cheaper Stripe's 2.9% + 30¢ is priced as a one-size-fits-all.
  • It's designed to be profitable across every merchant category — which means it's overpriced for most merchants above $50k/mo and underpriced for a few edge cases (very small tickets, B2B cards-on-file, international-heavy).
On this page

    Stripe vs IC+ cost comparison

    Projects annual cost under Stripe flat-rate vs a typical IC+ contract at your volume tier.

    (function(){ function calc(){ var vol = parseFloat(document.getElementById("sv-vol").value)||0; var ticket = parseFloat(document.getElementById("sv-ticket").value)||50; var intl = parseFloat(document.getElementById("sv-intl").value)/100; var sub = document.getElementById("sv-sub").value === "yes"; var cb = parseFloat(document.getElementById("sv-cb").value)||0; var txns = vol/ticket; var domesticTxns = txns * (1-intl); var intlTxns = txns * intl; // Stripe flat rate: 2.9% + 30¢ domestic, +1.5% international var stripeDom = (vol * (1-intl)) * 0.029 + domesticTxns * 0.30; var stripeIntl = (vol * intl) * (0.029 + 0.015) + intlTxns * 0.30; var stripeBilling = sub ? vol * 0.005 : 0; var stripeCB = cb * 15; var stripeTotal = stripeDom + stripeIntl + stripeBilling + stripeCB; // IC+ estimate — assume typical $500k-1M band pricing: IC + 0.20% + 8¢ // Interchange blended CNP ~1.85%, assessments ~0.16%, markup 0.20% + 8¢ var icBlend = 0.0185; var assess = 0.0016; var markup = 0.0020; if (vol < 100000) markup = 0.0040; else if (vol < 500000) markup = 0.0030; else if (vol < 2000000) markup = 0.0020; else markup = 0.0012; var perTxn = vol 0) icTotal += (vol * intl) * 0.009; // cross-border icTotal += cb * 15; var diff = stripeTotal - icTotal; var annualDiff = diff * 12; var html = '
    '; html += '
    Stripe flat-rate
    $'+Math.round(stripeTotal).toLocaleString()+'
    Effective: '+((stripeTotal/vol)*100).toFixed(2)+'%
    '; html += '
    Interchange-plus
    $'+Math.round(icTotal).toLocaleString()+'
    Effective: '+((icTotal/vol)*100).toFixed(2)+'%
    '; html += '
    '; var color = diff > 0 ? "#52c41a" : "#ff5a5a"; var label = diff > 0 ? "IC+ saves" : "IC+ costs more"; html += '
    '+label+'
    $'+Math.round(Math.abs(diff)).toLocaleString()+'/mo
    $'+Math.round(Math.abs(annualDiff)).toLocaleString()+' per year — '+Math.abs((diff/stripeTotal)*100).toFixed(1)+'% of current Stripe spend
    '; if (vol < 50000) html += '
    At this volume, Stripe flat-rate is often cheaper because IC+ fixed fees and monthly minimums bite harder than the flat-rate premium.
    '; document.getElementById("sv-result").innerHTML = html; } document.getElementById("sv-calc").addEventListener("click", calc); calc(); })();

    When Stripe is cheaper and when IC+ is cheaper

    Stripe's 2.9% + 30¢ is priced as a one-size-fits-all. It's designed to be profitable across every merchant category — which means it's overpriced for most merchants above $50k/mo and underpriced for a few edge cases (very small tickets, B2B cards-on-file, international-heavy).

    The cross-over point where IC+ beats Stripe is typically at $30-50k/mo of card volume for ecommerce with clean ticket sizes. Below that, Stripe usually wins because IC+ contracts carry monthly minimums ($25-100), statement fees ($10-40), and per-transaction fixed fees that compound on low volume.

    Above $100k/mo the Stripe premium is usually 40-100 bps of pure margin that the merchant gets back with IC+. Above $500k/mo the gap is typically 60-120 bps. At $2M+/mo, Stripe is leaving 80-150 bps on the table relative to a well-negotiated IC+ contract or an Adyen/Worldpay enterprise deal.

    Why Stripe is sticky anyway

    Most merchants stay on Stripe above the cross-over point because Stripe's infrastructure is excellent. APIs are clean, docs are complete, webhooks are reliable, the dashboard is fast. Migrating off Stripe to a lower-cost IC+ acquirer means rewriting integrations, retraining ops, and accepting a UX downgrade. Many operators (correctly) decide the price premium is worth the infrastructure.

    But the decision should be conscious. If you're paying $40k/mo in processing fees on Stripe and could pay $24k/mo on IC+, that's $192k/yr of decision to make — not a default to accept.

    What the calculator captures

    Volume, ticket, international mix, subscription billing usage, chargeback count. These five inputs cover 95% of the cost variance between Stripe and IC+ for ecommerce merchants.

    Stripe math: 2.9% + 30¢ on domestic, 2.9% + 1.5% + 30¢ on international. Billing adds 0.5% if used. Chargebacks are $15 each. Radar ($0.05/authorized) and Instant Payouts (1.5%) are not included unless you enable them.

    IC+ math: blended CNP interchange around 1.85%, network assessments 0.16%, processor markup scaled to your volume (40 bps at $100k/mo, 20 bps at $500k/mo, 12 bps at $2M/mo), per-transaction fees 7-10¢, cross-border 1% added on international volume, chargeback $15 each.

    What's missing from this model

    Reserves — IC+ contracts sometimes carry reserves where Stripe does not (and vice versa for high-risk). Our reserve cost calculator handles that separately.

    Dispute handling — Stripe's dispute workflow is instrumented. Legacy acquirers make you log in to a separate portal. Real cost but hard to quantify.

    Fraud tools — Stripe Radar is best-in-class at $0.05/authorized. Replacing it on IC+ means standalone fraud tools (Sift, Kount, Signifyd) at 15-50 bps.

    Payout timing — Stripe pays in 2 days standard. Most IC+ acquirers pay next-day. Real cash-flow impact; our payout timing calendar shows the math.

    Payment method breadth — Stripe supports ~40 global methods out of box. Traditional IC+ acquirers often support 5-10. If you need Klarna, Afterpay, OXXO, iDEAL, etc., Stripe is hard to replace.

    When to keep Stripe

    • Under $50k/mo volume — math favors flat-rate
    • Heavy global payment method mix — Stripe's breadth is hard to replicate
    • Engineering team too small to maintain a second acquirer integration
    • Marketplace or Connect use case — Stripe Connect is uniquely good
    • Brand/product that Stripe classifies as low-risk; don't tempt a risk review

    When to move to IC+

    • Above $500k/mo — the premium becomes material
    • Consistent card mix and simple flows
    • High-risk vertical where Stripe is tolerating you but at premium pricing
    • Multi-brand operator who wants a single parent MID
    • B2B-heavy where Level 2/Level 3 data can drop interchange 40-80 bps (IC+ exposes this; flat-rate buries it)

    The multi-brand move

    For multi-brand operators running 5+ Stripe accounts, the consolidation math is compelling. 5 Stripe accounts at 2.9% + 30¢ = 5 separate flat-rate contracts with 5 separate fraud exposures. Consolidating on a parent MID via multiflow at 5.5-7.5% (our tier pricing on gross + interchange passthrough) plus our setup fee typically compresses 40-80 bps versus the sum of 5 Stripe contracts — plus eliminates the risk of a single Stripe review taking down one of 5 brands.

    FAQ

    Does Stripe ever offer IC+ pricing?

    Yes — Stripe's Custom tier for $500k/mo+ merchants includes IC+. You have to ask for it explicitly. Not volunteered.

    Will Stripe match an IC+ quote?

    Sometimes, if your volume justifies. Bring a competing quote with specifics (acquirer, markup, fixed fees). Stripe's pricing team can move 20-60 bps on a qualified merchant.

    What's the typical IC+ contract term?

    1-3 years with automatic renewal. Early termination fees are standard ($250-1000). Negotiate the fee and the auto-renew clause.

    Is switching worth the integration pain below $200k/mo?

    Rarely. Below $200k/mo the annual savings of 40-80 bps is $10-20k. Integration work for a second acquirer typically costs 40-80 engineering hours. Net positive but small; most merchants don't bother.

    Do IC+ processors require a long-term commitment?

    Most do. Month-to-month IC+ contracts exist but typically carry higher markup as the processor amortizes customer acquisition over shorter tenure.

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