Embedded finance 101: how neobanks and B2B fintechs use accounting data to power smarter products

Embedded finance is the integration of financial services, like lending, payments, insurance, and banking, directly into non-financial software products. For neobanks and B2B fintechs, the opportunity is even more specific: using data from your customers' accounting and ERP systems to build financial products that are smarter, more personalized, and more deeply integrated into the business workflow.

This post covers how accounting data powers embedded finance products, what data is available, and the technical patterns that the most successful fintechs use. We work with many of the companies building in this space, so this is informed by what we've seen firsthand.

What embedded finance looks like in B2B fintech

The traditional model for business banking is disconnected. A business runs its operations in QuickBooks or NetSuite, processes payments in Stripe or PayPal, manages expenses in Ramp or Brex, and banks with a separate institution that has limited visibility into any of it. Each tool has its own view of the business, and none of them have the full picture.

The embedded finance model collapses this. Companies like Mercury, Airwallex, and Payoneer are building banking experiences that are connected to the business's financial data. When a business's accounting data is flowing into the banking product, the bank can offer proactive cash flow insights, automated expense categorization, real-time financial health monitoring, and smarter credit decisions, all without the business owner doing anything.

PayPal's vision is the most ambitious example we've seen up close. Their GM of small business, Michelle Gill, is building something like a financial operating system for their 35 million small business merchants. The idea is a suite of value-add financial products, twenty or more workflows, that all require integration with the merchant's accounting, commerce, and payment platforms. They wanted a single provider so that their merchants authenticate once and only once, and that integration powers every product across the platform. That's the kind of architecture we've been building toward with our financial OS thesis, and PayPal's vision is a proof point for where the entire market is heading.

How accounting data powers financial products

Cash flow management

By reading accounts receivable, accounts payable, and bank balance data from the accounting system, a banking product can project cash flow weeks or months into the future. It can alert the business when a cash crunch is approaching and suggest actions like accelerating receivables collection or adjusting payment timing.

Automated bookkeeping and expense sync

When a business makes a payment through their bank or card product, the transaction can be automatically categorized and written back to the accounting system as a properly coded expense. This eliminates manual data entry for the business's accounting team and increases adoption of the financial product. Bujeti built exactly this: their platform pulls accounting data from customers' bookkeeping tools and syncs corporate banking transactions back into the accounting system automatically.

Lending and credit products

Access to the general ledger, profit and loss statements, and accounts receivable aging gives a lender real-time visibility into the financial health of a business. This data supports more accurate credit decisions than bank statements alone, and it enables continuous monitoring for revolving credit products.

Invoice and bill management

Reading invoice and bill data from the accounting system allows a banking product to surface upcoming payments, identify which invoices are overdue, and offer services like invoice financing or early payment discounts. Writing invoice data back means the business can manage invoicing directly from their banking product. This is one of the use cases where write quality really matters, because if the data written to the accounting system isn't structured correctly from a bookkeeping perspective, it creates real problems for the business.

Financial health dashboards

By aggregating data from accounting, commerce, and payment platforms, a fintech product can build a comprehensive financial dashboard that shows revenue trends, expense breakdown, profitability, and cash runway, all updated in real time. Brightflow AI built this kind of full-picture financial intelligence using accounting data accessed through our unified API.

The technical pattern

The architecture for embedded finance products that use accounting data follows a consistent pattern.

First, the business connects their accounting platform through an OAuth-based authentication widget. This creates a persistent connection that the fintech product can query for ongoing data access.

Second, the unified API syncs the relevant accounting data: chart of accounts, journal entries, invoices, bills, payments, financial statements, and vendor records. The data is normalized across platforms so the fintech product works the same whether the customer uses QuickBooks, Xero, or NetSuite.

Third, the fintech product reads this data to power its features. For cash flow forecasting, it reads AR and AP aging. For expense sync, it writes categorized transactions back to the accounting system. For lending, it reads financial statements and computes risk metrics.

Fourth, webhooks provide real-time notifications when data changes in the accounting system, so the fintech product stays current without constant polling.

Why this is becoming table stakes

Every fintech company is becoming a data company. The businesses that use your product already have their financial data in accounting systems. If you're not connecting to that data, a competitor will. The companies we work with, from Mercury to PayPal to Airwallex, all view accounting integrations as foundational to their product roadmap, not as a nice-to-have feature.

The shift from disconnected banking to embedded, data-connected finance is the same trajectory that happened in consumer fintech with products like Plaid. The B2B version is playing out now, and the winners will be the companies that build the deepest, most reliable connections to their customers' financial data.

If you're building a neobank, embedded lending product, or any B2B financial tool, accounting API integrations are the infrastructure layer that everything else is built on. The question isn't whether to build these integrations but how.

‍