"Free checking." "No-fee trading." "0% interest." Fintech marketing is full of zeros, yet many of these companies report billions in revenue. The money comes from somewhere: merchants, interest rates, lending spreads, market makers, subscriptions, or fees you might not notice. Knowing the business model behind an app tells you what the company is motivated to get you to do.
Key takeaways
- Most fintech revenue comes from a handful of sources: interchange, interest earned on customer money ("float"), lending, trading-related revenue, subscriptions, and transaction fees.
- Interchange is paid by merchants' banks, not directly by you. Federal rules cap debit interchange for banks with $10 billion or more in assets, which is why many neobanks partner with smaller banks [1][2].
- As of their Q2 2026 reports, Chime's largest revenue line was interchange-driven payments revenue, SoFi's largest was net interest income, and Robinhood's largest was transaction-based revenue [3][4][5].
- The federal debit interchange cap was vacated by a federal district court in 2025, but the ruling is stayed while the Federal Reserve appeals [6][7].
- "Free" products usually mean the cost is paid indirectly. That isn't necessarily bad, but it shapes incentives.
The six main fintech revenue models
| Model | Who pays | How it works | Typical fintech examples (model, not endorsement) |
|---|---|---|---|
| Interchange | Merchant's bank (costs passed to merchants) | Fee on each card purchase, shared by issuing bank and fintech | Neobank debit cards, corporate cards |
| Net interest income / float | Indirect: you earn less than the money earns | Earning interest on deposits or cash balances, or lending them out | Digital banks, brokerages with cash sweeps |
| Lending | Borrowers (interest, fees) and sometimes merchants | Interest spread, origination fees, loan sales | Personal loans, BNPL, cash advances |
| Trading-related revenue | Market makers, and traders via spreads | Payment for order flow, crypto spreads, event contracts | Retail brokerages |
| Subscriptions | You | Monthly or annual membership fees | Premium tiers, credit builders, spend software |
| Transaction and service fees | You or businesses | Instant transfers, FX, ATM, processing fees | Payment apps, money transfer, processors |
1. Interchange: getting paid when you swipe
Interchange is a fee the merchant's bank pays the card-issuing bank every time you use a debit or credit card. Card networks like Visa and Mastercard set the rates, and merchants absorb the cost through their processing fees Related field note Related field note.
For debit cards, the Durbin Amendment and the Federal Reserve's Regulation II limit interchange for large issuers. The standard cap is 21 cents plus 5 basis points (0.05%) of the transaction, plus up to 1 cent for issuers that meet fraud-prevention standards [2]. Banks with less than $10 billion in assets, including affiliates, are exempt [1].
That exemption is a big reason many U.S. neobanks partner with smaller banks: the exempt bank can earn higher, uncapped debit interchange and share it with the fintech. Related field note
Example: Chime reported Q2 2026 revenue of $670 million, of which $430 million was "payments revenue," which it attributes primarily to interchange from card transactions [3].
A legal wildcard
In 2025, a federal district court in North Dakota vacated Regulation II's debit interchange standard in the Corner Post litigation. The judge stayed that ruling pending appeal "to prevent interchange transaction fees from becoming a completely unregulated market," and the Federal Reserve appealed to the Eighth Circuit, filing its reply brief on March 23, 2026 [6][7]. The Fed had separately proposed lowering the cap in 2023 [8]. As of September 17, 2026, we did not find a final appellate decision; check for updates, because the outcome could change debit economics for large issuers.
2. Float and net interest income
Float is the money customers leave sitting in an account. Net interest income (NII) is what a company earns on loans and investments minus what it pays customers in interest.
- A chartered fintech bank can lend deposits out and keep the spread. Related field note
- A non-bank fintech may earn a share of interest from partner banks where customer funds sit, or from sweep programs.
- Brokerages earn interest on uninvested cash and on margin loans.
Example: SoFi, which owns a bank, reported Q2 2026 net interest income of $788.2 million, out of GAAP net revenue of $1.218 billion [4]. Robinhood reported net interest revenues of $389 million in Q2 2026 [5].
What it means for you: When interest rates fall, float income shrinks, which can lead companies to cut savings rates or push other revenue. Cash sweep programs that pay low rates can quietly cost customers; the SEC's 2022 settlement with Schwab over its robo-adviser cash allocations is one documented example Related field note.
3. Lending
Lending revenue includes interest, origination fees, late fees, and gains from selling loans to investors.
- Personal and student loans: SoFi reported its lending segment brought in $724.8 million in net revenue in Q2 2026 [4].
- Buy now, pay later (BNPL): providers typically earn from merchant fees and, on some plans, consumer interest. Related field note
- Cash advances and earned wage access: some charge optional "tips" or instant-transfer fees. Related field note
- Chime's "platform-related revenue," which includes its MyPay advances and Instant Loans, was $240 million in Q2 2026, up 48% year over year [3].
Lending earns more per customer than interchange but carries credit risk: if borrowers don't repay, the company loses money. That is why lending-heavy fintechs are sensitive to economic downturns.
4. Trading-related revenue
Payment for order flow (PFOF) is compensation a broker receives from a market maker for sending customer orders to that market maker to execute. It lets brokers advertise commission-free trading. Critics argue it creates conflicts over execution quality; supporters say it has lowered costs for retail investors. The SEC proposed an "Order Competition Rule" that would have changed how retail orders are handled, but withdrew it in June 2025, along with other pending proposals [9][10].
Brokerages also earn from crypto spreads (the difference between buy and sell prices) and newer products like event contracts (bets on outcomes such as economic data or sports, regulated as derivatives).
Example: Robinhood reported Q2 2026 transaction-based revenues of $776 million, including $342 million from options, $156 million from event contracts, $129 million from equities, and $100 million from crypto [5].
5. Subscriptions
Subscriptions convert "free" users into paying members for perks: higher interest rates, bigger instant-transfer limits, research tools, or extra credit-building features.
- Robinhood reported "other revenues" of $143 million in Q2 2026, citing growth in Robinhood Gold subscription revenue among the drivers [5].
- Spend management platforms sell per-user software tiers alongside free plans. Related field note
- Credit-builder apps often charge monthly fees. Related field note
Subscriptions are predictable revenue, which investors like, but they only work if members perceive ongoing value.
6. Transaction and service fees
These are the most visible fees:
- Instant transfer fees to move money to a bank or debit card immediately instead of waiting for standard ACH
- Foreign exchange markups on cross-border payments Related field note
- Payment processing fees charged to merchants Related field note
- Out-of-network ATM fees, paper check fees, and similar charges
How incentives shape the product
Each model nudges a company toward certain behavior:
| If a company earns mainly from... | It wants you to... | Watch for... |
|---|---|---|
| Interchange | Use its card often, ideally for everything | Rewards that encourage overspending |
| Float | Keep large balances | Low interest paid on idle cash |
| Lending | Borrow, and keep borrowing | Easy credit, fees on advances |
| Trading revenue | Trade frequently, especially options or event contracts | Gamified design, complexity |
| Subscriptions | Upgrade and stay subscribed | Hard-to-cancel plans |
| Transaction fees | Pay for speed or convenience | Default settings that trigger fees |
None of these models is inherently bad. A bank that earns interchange isn't harming you when you buy groceries. But knowing the model helps you ask the right questions. Related field note
Reading a fintech's numbers
Public fintechs disclose revenue by category in quarterly reports and SEC filings. A few tips:
- Look for revenue mix, not just total revenue.
- Note non-GAAP measures such as "adjusted net revenue" and compare them with GAAP figures. SoFi, for example, reported both [4].
- Check per-customer metrics. Chime reported average revenue per active member of $260 in Q2 2026 [3]; definitions vary by company.
- Read the risk factors for sensitivity to interest rates, interchange regulation, and credit losses.
FAQ
How do free banking apps make money? Mostly from interchange on debit card purchases, plus interest on deposits, optional fees such as instant transfers, and sometimes small-dollar lending, as Chime's Q2 2026 revenue breakdown illustrates [3].
What is the Durbin Amendment? A 2010 federal law provision, implemented through the Fed's Regulation II, that caps debit interchange fees for issuers with $10 billion or more in assets [1][2].
Is payment for order flow bad for investors? It's debated. It enables zero-commission trading but raises conflict-of-interest concerns. In June 2025 the SEC withdrew its proposed Order Competition Rule, which would have reshaped how retail orders are handled [9][10].
Why do fintech savings rates change so often? Much of their revenue depends on interest rates. When benchmark rates move, what they earn on deposits changes too.
Do fintechs sell my data? Business models vary. Read the privacy policy and check whether data is shared with affiliates or third parties. Related field note
Sources
- Board of Governors of the Federal Reserve System, "Regulation II – Interchange Fee Standards: Small Issuer Exemption," https://www.federalreserve.gov/paymentsystems/regii-interchange-fee-standards.htm (accessed 2026-09-17)
- eCFR, 12 CFR Part 235 (Regulation II), §§ 235.3–235.4, https://www.ecfr.gov/current/title-12/chapter-II/subchapter-A/part-235 (accessed 2026-09-17)
- Chime Financial, Inc., "Chime Reports Second Quarter 2026 Financial Results," https://investors.chime.com/news-releases/news-release-details/chime-reports-second-quarter-2026-financial-results (August 5, 2026; accessed 2026-09-17)
- SoFi Technologies, "SoFi Reports Second Quarter 2026 with Record Net Revenue of $1.2 Billion...," Business Wire, https://www.businesswire.com/news/home/20260729569583/en/ (July 29, 2026; accessed 2026-09-17)
- Robinhood Markets, Inc., "Robinhood Reports Second Quarter 2026 Results," GlobeNewswire, https://www.globenewswire.com/news-release/2026/07/29/3335576/0/en/robinhood-reports-second-quarter-2026-results.html (July 29, 2026; accessed 2026-09-17)
- ABA Banking Journal, "Federal Reserve files reply brief in Reg. II appeal," https://bankingjournal.aba.com/2026/04/federal-reserve-files-reply-brief-in-reg-ii-appeal/ (April 1, 2026; accessed 2026-09-17)
- Cooley LLP, "District Court Vacates Regulation II's Debit Card Interchange Fee Standard," https://www.cooley.com/news/insight/2025/2025-08-15-district-court-vacates-regulation-iis-debit-card-interchange-fee-standard (August 15, 2025; accessed 2026-09-17)
- Federal Register, "Debit Card Interchange Fees and Routing" (proposed rule), https://www.federalregister.gov/documents/2023/11/14/2023-24034/debit-card-interchange-fees-and-routing (November 14, 2023; accessed 2026-09-17)
- U.S. Securities and Exchange Commission, "Order Competition Rule," https://www.sec.gov/rules-regulations/2025/06/order-competition-rule (June 2025; accessed 2026-09-17)
- Proskauer Rose LLP, "SEC Formally Withdraws Fourteen Rule Proposals," https://www.proskauer.com/alert/sec-withdraws-fourteen-rule-proposals (June 2025; accessed 2026-09-17)
Last updated September 17, 2026. This article is for educational purposes only and is not financial, investment, legal, or tax advice. Company figures are from their own quarterly releases and may use non-GAAP measures; mentioning a company is not a recommendation to buy its stock or use its products. Verify current terms with providers.