Accounting Integration
An accounting integration is a connection between accounting software, such as QuickBooks, Xero, NetSuite, or Workday, and another system that produces financial data, such as a card platform, bank, payroll tool, or billing system. It sends transactions into the accounting system automatically, mapped to the right accounts, classes, and vendors, often with receipts and memos attached. The goal is to remove manual exports, re-keying, and month-end cleanup.
Last updated: September 2026
Why accounting integrations matter
Every manual step between a transaction and the ledger is a chance for a miscoded line and a reason month-end close takes longer.
Without an integration, card spend usually reaches accounting as a statement or CSV export that someone categorizes by hand. With hundreds of advertising charges a month across several clients, that work grows with the business. A well-configured integration moves the categorizing to the moment the transaction happens, so the general ledger receives entries that are already coded by account and by client, brand, or department.
Integrations are only as good as their mapping. A sync that sends every charge to one uncategorized expense account saves typing but not work.
What a good accounting integration does
- Maps accounts: links each transaction type to the right account in the chart of accounts.
- Applies classes or tracking: tags spend by client, location, or department.
- Attaches evidence: carries receipts, invoices, and notes with the transaction.
- Syncs on a schedule: updates daily or in real time rather than at month end.
- Handles exceptions: flags uncoded or unmatched items for review instead of guessing.
Business examples
An agency syncing card transactions to QuickBooks with each charge tagged to a client class, so client profitability reports need no extra work. A finance team moving from monthly CSV imports to a daily sync and closing the books a week sooner. A company mapping each advertising platform to its own expense account so media costs can be compared without spreadsheets.
For the ad spend view, see how to automate ad spend reconciliation in QuickBooks.
Frequently asked questions
QuickBooks Online and Xero are the most common for small and mid-sized businesses. Larger companies often use NetSuite, Sage Intacct, or Workday. Supported integrations vary by provider, so check the specific systems before choosing a card platform.
No. It reduces manual data entry and makes reconciliation faster, but balances still need to be checked against bank and card statements each period to catch missing, duplicate, or miscoded entries.
Map platform charges to a media or advertising expense account, and add a class, tracking category, or customer tag for the client or brand. That keeps reporting by client possible without creating separate accounts for each one.
See what Opal can do for you
Learn how our spend platform can increase the strategic impact of your finance team and future-proof your company
