Verdict: Which should most freelancers use in 2026?
For digital-first B2B freelancers and consultants who invoice online and collect by card or ACH, Stripe is usually the lower-cost default. Once Stripe's 0.4% Invoicing Starter fee is included, its all-in card invoice rate matches Square Free's 3.3% + $0.30 — but Stripe's ACH math is significantly better on mid-size invoices because ACH Direct Debit caps at $5 before the invoicing fee, versus Square Free's uncapped 1%.
Square wins when you also sell in person, want contracts, estimates, and a project workspace in one simple app, or process enough invoice volume to justify Square Plus at $49 per month. Skip Square if you are purely digital and ACH-heavy without needing its POS or project layer. Skip Stripe if you want a less technical, all-in-one business app with built-in contracts and in-person checkout. All fees in this article are as of June 2026 — confirm current rates at each platform before making a decision.
What are the actual fee structures?
Most comparisons quote only the card processing rate and call it a day. For invoice-based freelancers, there are three layers worth understanding: the card or ACH processing fee, any invoicing platform fee on top, and optional subscription costs.
Stripe invoicing fees (as of June 2026)
Stripe charges 2.9% + $0.30 for standard domestic card transactions. On top of that, one-time invoices sent through Stripe Invoicing add the Invoicing Starter fee of 0.4% per paid invoice, making the all-in card invoice rate roughly 3.3% + $0.30. The Invoicing Plus tier costs 0.5% per paid invoice and adds features like automatic collection and more automation options. Recurring subscription invoices fall under Stripe Billing, which is priced separately at 0.7% of volume on a pay-as-you-go basis.
For ACH, Stripe charges 0.8% capped at $5 for ACH Direct Debit. Add the 0.4% Invoicing Starter fee and a single $5,000 ACH invoice costs you $25 all-in — $5 in ACH processing plus $20 in invoice fee. That cap structure gives Stripe a real advantage on larger B2B invoices.
Other Stripe fees to know: Instant Payouts cost 1.5% with a $0.50 minimum (standard payouts are free), and disputes cost $15 per dispute received, refunded if you win.
Square invoicing fees (as of June 2026)
Square operates on three tiers. Square Free has no monthly cost but charges 3.3% + $0.30 on online and invoice card payments. ACH via invoice is 1% with a $1 minimum and no cap — meaning a $10,000 invoice costs $100 in ACH fees alone. In-person card-present transactions are 2.6% + $0.15.
Square Plus costs $49 per month per location ($588 per year) and drops online and invoice card payments to 2.9% + $0.30. Crucially, it also caps invoice ACH at $10 per transaction. In-person drops to 2.5% + $0.15. Square Premium runs $149 per month, reduces in-person card to 2.4% + $0.15, and adds 24/7 phone support, but the online and invoice card rate stays at 2.9% + $0.30 — so Premium rarely makes sense for invoice-only freelancers.
Square also charges 3.5% + $0.15 for manual entry and card-on-file, 6% + $0.30 for Afterpay, and 1.95% for instant or same-day transfers. There is no Square dispute management fee and no PCI compliance fee.
| Fee type | Stripe (Invoicing Starter) | Square Free | Square Plus ($49/mo) |
|---|---|---|---|
| Online/invoice card | 3.3% + $0.30 all-in | 3.3% + $0.30 | 2.9% + $0.30 |
| ACH invoice (one-time) | 0.8% capped $5 + 0.4% invoice fee | 1%, min $1, no cap | 1%, min $1, $10 cap |
| In-person card | Not applicable | 2.6% + $0.15 | 2.5% + $0.15 |
| Dispute fee | $15 (refunded if won) | None listed | None listed |
| Instant payout | 1.5%, min $0.50 | 1.95% per transfer | 1.95% per transfer |
| Monthly cost | $0 | $0 | $49/mo |
The invoice-shape math: same revenue, different outcomes
Headline rates tell you nothing useful until you multiply them by your actual invoice size and payment mix. Here is the same analysis run at three common solo revenue levels. All scenarios assume U.S. domestic payments only, one-time invoices (not subscriptions), and no instant payouts, international cards, or chargebacks. Card figures for Stripe include the 0.4% Invoicing Starter fee.
Persona A: $45,000 side-hustle freelancer
Assume 18 invoices averaging $2,500, with 13 paid by card ($32,500) and 5 paid by ACH ($12,500).
- Stripe: Card fees of about $1,072 (32,500 × 3.3% + 13 × $0.30) plus ACH fees of $75 (each $2,500 ACH invoice: $5 cap + $10 invoice fee = $15 × 5). Total: roughly $1,147.
- Square Free: Card fees of about $1,072, plus ACH fees of $125 ($12,500 × 1%). Total: roughly $1,197.
- Square Plus: Card fees of about $946 (32,500 × 2.9% + 13 × $0.30), plus ACH of $50 (5 × $10 cap), plus $588 subscription. Total: roughly $1,584.
Takeaway: At this scale, Stripe saves roughly $50 versus Square Free. Square Plus costs about $437 more than Stripe — the subscription eats any rate savings completely. If you occasionally sell in person, Square Free may still be worth the slight fee gap for the added convenience, but Stripe wins on pure invoicing cost.
Persona B: $90,000 consultant
Assume 24 invoices averaging $3,750, with 12 paid by card ($45,000) and 12 paid by ACH ($45,000).
- Stripe: Card fees of about $1,485 (45,000 × 3.3% + 12 × $0.30) plus ACH fees of $240 (each $3,750 ACH invoice: $5 cap + $15 invoice fee = $20 × 12). Total: roughly $1,725.
- Square Free: Card fees of about $1,485 plus ACH fees of $450 ($45,000 × 1%). Total: roughly $1,935.
- Square Plus: Card fees of about $1,305 (45,000 × 2.9% + 12 × $0.30), plus ACH of $120 (12 × $10 cap), plus $588 subscription. Total: roughly $2,013.
Takeaway: Stripe still wins for a balanced B2B consultant. Square Plus saves about $630 on processing versus Square Free, but that is more than eaten by the $588 subscription — net advantage is essentially zero, and Stripe still runs about $288 cheaper than Square Plus. The only reason to choose Square here is workflow: contracts, project workspace, estimates, and POS in one app.
Persona C: $180,000 agency-of-one
Assume 36 invoices averaging $5,000, with 11 paid by card ($55,000) and 25 paid by ACH ($125,000).
- Stripe: Card fees of about $1,815 (55,000 × 3.3% + 11 × $0.30) plus ACH fees of $625 (each $5,000 ACH invoice: $5 cap + $20 invoice fee = $25 × 25). Total: roughly $2,440.
- Square Free: Card fees of about $1,815 plus ACH fees of $1,250 ($125,000 × 1%). Total: roughly $3,065.
- Square Plus: Card fees of about $1,595 (55,000 × 2.9% + 11 × $0.30), plus ACH of $250 (25 × $10 cap), plus $588 subscription. Total: roughly $2,433.
Takeaway: At this level, Square Plus and Stripe reach near parity — Square Plus comes in about $7 cheaper per year in this specific scenario. That is not a meaningful fee advantage. The real case for Square Plus here is workflow value: if you genuinely use the contracts, project dashboard, estimates, and in-person POS, the subscription pays for itself in saved tool costs, not just payment fees. If you are purely online with no POS need, Stripe remains the cleaner choice.
When does Square Plus actually break even?
Two break-even scenarios worth understanding:
Card invoice break-even: Square Plus saves 0.4 percentage points on online invoice card payments versus both Square Free and Stripe Invoicing Starter. Divide the $588 annual subscription by 0.004, and you need roughly $147,000 per year in card invoice volume just for the card rate reduction to cover the subscription cost — before the ACH cap benefit is counted.
ACH invoice break-even: Square Plus caps invoice ACH at $10 while Square Free is 1% uncapped. On a $5,000 ACH invoice, Square Free costs $50 and Square Plus costs $10, saving $40 per invoice. You need about 15 such ACH invoices per year to save $600, roughly covering the $588 subscription — without counting any card savings.
The practical conclusion: Square Plus earns its fee when you combine meaningful card invoice volume with several large ACH invoices and use the workflow features. Card invoices alone rarely justify it unless revenue is well above $100,000.
What does each platform actually include for invoicing?
Stripe Invoicing capabilities
Stripe Invoicing supports no-code invoice creation, hosted invoice pages, PDF delivery, invoice emails, auto-charge, partial payments and payment schedules, coupons and discounts, quotes and estimates, multi-currency billing, automatic reconciliation, automatic collection retries, and Stripe Tax support. Payment Links are included at standard pricing, and a custom domain for hosted payment pages costs $10 per month. Stripe supports 195 countries, 135+ currencies, and 100+ payment methods — making it the clear choice if any of your clients are outside the U.S. or pay in foreign currencies. If you use FreshBooks or another invoicing platform as your primary invoice tool, Stripe can layer in as the payment processor underneath.
The honest limitation: Stripe is more technically oriented. Its dashboard is powerful but less intuitive for nontechnical solo operators. There is no native contracts or e-signature layer, no project workspace, and no in-person POS hardware ecosystem.
Square Invoicing capabilities
Square Invoices includes unlimited invoices and recurring invoices on all plans, automatic payment reminders, deposit collection, payment schedules, and invoice templates. Square Plus and Premium add project workspace with dashboards, batch invoices, contracts with e-signature, and estimates. No hardware is required to send invoices, collect online payments, or use Tap to Pay on a compatible phone.
Square's honest limitation: the Free plan's online and invoice card rate of 3.3% + $0.30 and uncapped 1% ACH mean it is more expensive than Stripe for ACH-heavy B2B freelancers. And if you do not need the POS, contracts, or project features, you are paying for infrastructure you will not use.
How does each platform handle the solo business structure?
Both Stripe and Square work without employees or payroll. Square supports sole-proprietor onboarding with SSN or ITIN, legal name, date of birth, and a U.S. home mailing address — no EIN required. You can update your taxpayer information to add an EIN and business name later if your entity situation changes. Stripe supports individual, sole-proprietor, single-member LLC, and private corporation structures, and may require SSN details for identity verification or EIN for company structures.
If you have elected S-corp status, both platforms can accommodate incorporated business workflows — but update your taxpayer identification to match your registered entity before processing significant volume. A payment processor does not handle payroll, reasonable compensation, or owner distributions. Those require a payroll system and a CPA. For ACH payments landing in a business account, pairing either processor with a dedicated business bank — like the one covered in our Mercury review — keeps your cash flow clean and your bookkeeping simple.
The 1099-K picture in 2026
Both Stripe and Square are third-party settlement organizations and will issue Form 1099-K if your activity crosses reporting thresholds. As of mid-2026, the federal TPSO threshold has been restored (retroactively, via the One Big Beautiful Budget Act) to more than $20,000 in gross payments and more than 200 transactions. Payment card transactions have no federal de minimis threshold, and states including IL, MO, DC, MD, MA, VT, and VA have lower state-level thresholds that may trigger a form even if you clear the federal bar.
Two things to keep straight: first, the 1099-K reports gross payment volume — it does not subtract processor fees, refunds, or any expenses. If your 1099-K shows $90,000 but you paid $1,800 in fees and issued $3,000 in refunds, you will need to reconcile that yourself. Second, all business income is taxable whether or not a 1099-K arrives. The threshold affects platform reporting, not your reporting obligations. See our 1099-K explainer for the full breakdown, and confirm your specific state and entity situation with a CPA or enrolled agent.
One framing note: switching to ACH can reduce processor fees meaningfully and simplifies some reporting scenarios, but ACH income is still fully taxable. Do not conflate lower fees with lower tax liability.
Who should skip each platform?
Skip Stripe if:
- You sell in person and want card readers, a POS system, and invoicing in one app without assembling tools.
- You want contracts, e-signature, and project workspace natively built into your invoicing flow.
- You find developer-oriented dashboards frustrating and want a simpler, more guided experience.
- Your clients already use and prefer Square's payment experience.
Skip Square Free if:
- You are primarily ACH-heavy: the uncapped 1% ACH fee compounds quickly on $3,000–$10,000 B2B invoices.
- You want the lowest possible cost on standard card invoices without paying a monthly subscription — Stripe Invoicing Starter matches Square Free on card rates and beats it on ACH.
- You need global payment methods, multi-currency support, or deep API integrations.
Skip Square Plus if:
- Your annual card invoice volume is below roughly $147,000 and you do not send multiple large ACH invoices — the $588/year subscription will not pay for itself on fees alone.
- You are online-only with no POS, contract, or project-workspace need — you would be paying for features that do not move your business forward.
Where does this fit in your Financial OS?
Payment processing sits in the Flow layer of your solo Financial OS — the systems that move money in and out cleanly and on time. Your payment processor is the first link in that chain: it determines when you get paid, what it costs, and how cleanly the data flows to your books and your bank.
A clean Flow stack for a digital-first consultant might look like: Stripe Invoicing for online card and ACH collection → Mercury as the business bank receiving ACH payouts → FreshBooks or similar for invoice creation and bookkeeping → a tax reserve account for quarterly estimates. For a creative freelancer who sells in person at markets or events as well as online, Square becomes the natural anchor: it handles invoices, POS, and payment collection in one place, reducing the number of tools and reconciliation steps.
Neither platform is a complete financial OS on its own. For a fuller picture of how the pieces fit together, see the Solo Financial OS overview. And if you are deciding between Stripe and PayPal rather than Stripe and Square, the analysis shifts — see our Stripe vs PayPal comparison for that scenario.
Bottom line
For most freelancers and consultants billing B2B clients online, Stripe Invoicing Starter is the cost-efficient default — its all-in card invoice rate matches Square Free, and its capped ACH fee beats Square Free significantly on invoices above roughly $500. Square Free is the better choice when you also need in-person payments, contracts, or a project workspace, and the slight card-fee equivalence is worth the workflow consolidation. Square Plus only justifies its $588 annual cost when card invoice volume approaches $147,000 or when you regularly send large ACH invoices and actively use the workflow features — not as a reflexive upgrade.
Run your own numbers using your actual invoice count, average size, and card-versus-ACH mix before committing. Fees change, and the platform that costs less today may not six months from now. And if your entity structure, state tax situation, or invoice volume is complex, loop in a CPA before making processor decisions that affect your 1099-K reporting or business banking setup.