Toast made $5 billion from financial services last year. Its software subscriptions brought in $936 million. That ratio tells you everything about where embedded finance for vertical SaaS is headed.

The pattern repeats across industries. Shopify's merchant solutions, spanning embedded payments, lending, and banking, now account for 73% of total revenue. Mindbody generates more than half its revenue from embedded financial products. These are software companies by origin, but financial services companies by revenue.

Embedded finance for vertical SaaS has become the business model. Most vertical SaaS founders are now focused on how to build the fintech stack correctly, not whether to build it at all.

The vertical SaaS fintech playbook: payments first, then everything else

Every vertical SaaS company that has pulled this off followed a nearly identical playbook. Embedded payments come first. Then embedded lending. Then insurance, banking, payroll, and cards. The order matters because each layer depends on data from the one before it.

Toast started with card processing through its POS terminals. Once it had transaction data on 164,000 restaurant locations, it could underwrite working capital loans (Toast Capital, $5,000 to $300,000 per loan, repaid as a percentage of daily card sales). Payroll came next, then insurance, then the Toast Pay Card for instant wage access.

Shopify followed the same arc. Shopify Payments now handles 68% of all GMV on the platform. That data feeds Shopify Capital, which originated $4.2 billion in merchant cash advances and loans in 2025 alone. Capital Flex, a revolving credit line launched in late 2025, signals the next step. Shopify Balance adds a spending card, faster payouts, and expense categorization directly inside the admin dashboard.

ServiceTitan processes tens of billions in gross transaction volume across its 9,500 contractor customers. In September 2025, it added BNPL through Affirm, letting homeowners finance large HVAC or plumbing jobs directly from the technician's tablet. Management estimates the company captures only 50% of its available take rate, meaning the fintech revenue line has room to double without adding a single new customer.

Procore took a different entry point in construction. It launched Procore Risk Advisors in March 2024, partnering with Allianz and Swiss Re to offer builders' risk and general liability policies. Procore Pay handles subcontractor payments with automated lien waiver management. Material Finance gives contractors extended payment terms for supplies.

The common thread: each financial product becomes possible because the platform already owns the workflow data that traditional banks would need months to collect.

Embedded payments revenue and take rates: the real economics

Andreessen Horowitz found that adding fintech features to vertical SaaS increases revenue per customer by 2x to 5x. The Payrix 2023 Embedded Finance Survey reported that over 40% of a platform's customers typically adopt embedded financial products, with revenue growing by an average of 40% per product launched.

Toast's numbers show how this compounds over time. Locations that stay on the platform for five years reach an average ARR of $16,000, a 6x increase from their initial spend. Net revenue retention sits at 109%. The bulk of that expansion comes from financial services, not software upsells.

The margin profile depends on how you implement payments. Using a managed payment facilitator like Stripe Connect costs roughly 3% plus a per-transaction fee, leaving thin margins. Moving to a white-label PayFac model through providers like Finix or Payrix captures around 50 basis points per transaction. Full in-house PayFac status (what Toast built) yields 50 to 100 basis points but requires at least $50 million in annual volume and serious compliance infrastructure. As Fractal Software's analysis noted, a company processing $100 million per year through a managed PayFac leaves approximately $500,000 in margin on the table.

Retention tells an equally compelling story. BCG and Adyen's 2025 research found that embedded payment strategies help SaaS platforms retain customers at 2.5x the rate of traditional payment providers. Visa's analysis of five European markets showed that verticalized acquirers achieve 19 percentage points higher payment volume growth and 5% less merchant attrition compared to horizontal competitors.

Embedded accounting: the missing layer in the fintech stack

Embedded payments, lending, and banking create value. But they also create a reconciliation problem.

A restaurant running Toast Payments, Toast Capital, and Toast Payroll has money flowing through multiple rails every day. Tips need to be distributed. Loan repayments deducted. Payroll taxes withheld. If none of that connects to the general ledger, the restaurant owner is back to exporting CSVs from three systems and manually keying entries into QuickBooks. The very financial products that were supposed to simplify their life have made bookkeeping harder.

Toast understood this early. Its xtraCHEF acquisition gave it AP automation with line-item invoice coding that syncs directly to QuickBooks general ledger accounts. Through integration with Restaurant365, daily sales journal entries and labor accrual entries are generated automatically. Toast claims payroll processing takes 30 minutes or less, with a third of users finishing in under 10 minutes. The entire financial loop is closed: sale captured, payment processed, tip distributed, payroll calculated, books updated.

This accounting integration layer is where the real lock-in happens. A platform that processes your payments is replaceable (switching costs are real but finite). A platform that processes your payments, underwrites your loans, runs your payroll, and maintains your general ledger is practically permanent.

The data backs this up. Platforms with embedded accounting report 38% higher ARPU and 20% higher customer lifetime value, according to Open Ledger's analysis. Roofstock achieved 3.5x higher retention among landlords using its Stessa Cash Management accounts (built on Unit's infrastructure), which included integrated bookkeeping. Baselane, a landlord management platform, cut customer acquisition costs by 50% after launching embedded finance with accounting built in.

From the other direction, Intuit has been adding financial products to QuickBooks: term loans up to $200,000 through WebBank, BNPL via an Affirm partnership embedded directly into QuickBooks invoices, and integrated payment acceptance. The accounting incumbents are converging on the same model from the opposite direction.

Embedded finance platforms and infrastructure providers

Five years ago, building an embedded finance stack for vertical SaaS required stitching together a dozen vendors and navigating bank sponsorship agreements that took 12 to 18 months to close. That friction has largely been removed.

Unit has enabled roughly 200 platforms to launch embedded banking, processing $40 billion in transactions annually for nearly 2 million end-customers. Unit explicitly offers QuickBooks integration so that platforms' customers can connect embedded accounts to their existing accounting software. Stripe powers payments, lending, treasury, and terminal hardware for platforms like Lightspeed and Jobber through a single integration. Parafin specializes in embedded capital, powering the lending products for platforms that lack the scale to build their own underwriting.

A newer wave of companies is tackling the accounting piece directly. Tight offers journals, ledgers, revenue recognition, and reconciliation as embeddable API infrastructure. Open Ledger provides AI-powered embedded accounting with real-time transaction reconciliation. And Modern Treasury automates the full cycle from payment initiation through to reconciliation.

The critical gap in most embedded finance stacks is the connection between where money moves and where it gets recorded. Platforms that close this gap create a single financial operating system for their customers. Those that leave it open create a fragmented mess that increases support costs and churn.

Embedded finance market size: $185 billion, mostly untapped

BCG and Adyen estimate the total addressable market for embedded finance at $185 billion across North America and Europe. Only about $32 billion of that has been captured. SaaS providers with integrated payments accounted for 36% of SME acquiring revenues in 2024, projected to reach 45% by 2028. Unit reports that more than half of businesses now run on vertical-specific software, a 60% increase in six years.

Regulatory pressure is increasing. The CFPB's open banking rule has its first compliance deadline in April 2026 for large data providers. States are tightening true-lender doctrines for bank-fintech partnerships. BNPL providers are being treated more like credit card issuers under a 2024 CFPB interpretive rule. These changes will likely favor platforms with strong compliance infrastructure and established banking relationships over smaller players attempting to bolt on financial products with minimal oversight.

The vertical SaaS companies that win over the next five years will be the ones that own the full embedded finance stack for their industry: payments in, lending when needed, payroll out, insurance covered, and every transaction automatically reconciled in the books. The software is the distribution channel. The money is the product.

For a deeper look at how platforms should approach the accounting layer specifically, see our guide to accounting integrations in vertical SaaS and using accounting APIs for lending decisions.