Connect Your Accounting Software via API
How to connect accounting software to ReconcileIQ via OAuth for live accounting platform sync -- and when manual CSV exports still make more sense.
When you connect accounting software directly to a reconciliation tool, you eliminate the staleness problem that plagues CSV exports. Every time you export a file from your accounting platform, you are looking at a snapshot that is already outdated. By the time you open the reconciliation tool, format the columns, and begin matching transactions, new entries have appeared in your bank feed. The client has paid an invoice. A direct debit has cleared.
ReconcileIQ integration with your accounting platform solves this through live accounting platform sync via OAuth. Instead of chasing stale data, you reconcile against what is in your books right now.
How ReconcileIQ Integration Works via OAuth
When you connect accounting software like Xero, QuickBooks, Sage, or Pandle to ReconcileIQ via OAuth, you are not handing over your password. You are issuing a token -- a piece of code that grants limited, read-only access to specific parts of your accounting platform.
The reconciliation tool can see your bank transactions. It can read your chart of accounts. Sometimes it can pull outstanding invoices. It cannot modify data, delete anything, or poke around in your tax settings. You revoke the token from your platform's connected apps page, and the connection dies instantly.
What "Read-Only Access" Means in Practice
A connected reconciliation tool can pull your bank transactions, chart of accounts, and sometimes outstanding invoices. It cannot create, edit, or delete anything. It cannot access payroll, tax settings, or user management. The scope of access is defined by the OAuth token you authorize, and you can revoke it at any time without changing your password.
This is not theoretical security. OAuth 2.1 has become the standard for accounting API authentication in 2026, replacing legacy methods with token-based flows that support enterprise-grade monitoring and anomaly detection. The risk is no longer whether OAuth is secure—it is—but whether you understand what you are authorizing.
The real security benefit is less about encryption than it is about control. CSV files sit in Downloads folders and email attachments indefinitely. Anyone with access to your laptop can open them. OAuth access is centralized, auditable, and revocable. You see every connected app in one place.
The Accounting Platform Sync Workflow
Manual reconciliation looks like this: export bank statement from platform, download CSV, open reconciliation tool, upload file, map columns (because every platform formats dates differently), wait for processing, export results, manually update books. Seven steps, three file transfers, two applications.
With ReconcileIQ integration, the workflow condenses: select client, select bank account, select date range, click reconcile. The accounting platform sync pulls live data. The results reflect what is in your platform right now, not what was there when you remembered to download the export.
The time saved is obvious. The hidden benefit of connecting your accounting software is that you can reconcile more frequently without the friction of file management. Weekly reconciliation becomes practical. Daily reconciliation becomes possible, if you have the appetite for it.
Supported Platforms: How to Connect Accounting Software
Xero
Xero's API is well-documented and widely supported for Xero reconciliation setup. Third-party tools have been building against it for years, which means the integration quality tends to be high. Xero pulls bank transactions directly, supports bank feeds natively, and returns data in clean, predictable formats.
From March 2026, Xero introduced tiered API pricing based on connections and data volume, replacing its previous revenue-share model. For reconciliation tools, this means clearer usage costs, but it also means developers may pass those costs to you.
QuickBooks Online
QuickBooks uses OAuth 2.0 and supports both UK and US instances, which matters if you manage clients across regions. For detailed setup, see our guide on QuickBooks reconciliation. The API can pull general ledger data, bank transactions, and outstanding invoices.
The catch is Intuit's launch of the App Partner Program, which moved from free unlimited API access to volume-based fees. For high-transaction clients, this affects tool pricing more than you might expect.
Sage
Sage's API exists, but it is more limited than Xero or QuickBooks. Sage Intacct targets enterprise clients with multi-entity structures and complex reporting needs, which means the API is built for a different use case than SME reconciliation.
For Sage 50 (desktop), API access is even more constrained. Most reconciliation tools fall back to CSV imports for Sage users, which negates the OAuth benefit entirely.
Pandle
Pandle is UK-focused, free for sole traders, and designed around simplicity. The API supports direct bank account access and clean transaction pulls.
Because Pandle's user base skews toward smaller practices and self-employed users, connected reconciliation often makes less sense here. If you are only reconciling one client per quarter, the OAuth setup overhead is probably not worth it.
FreeAgent
FreeAgent supports OAuth and is popular among sole traders and freelancers. The API is functional but narrower in scope than Xero or QuickBooks. Like Pandle, the use case here often favors simplicity over automation.
YNAB
YNAB is a personal budgeting tool, not business accounting software, but it appears in reconciliation contexts because some sole traders use it for cash flow tracking. The API is read-only and budget-focused. Reconciliation here means matching budget categories to bank transactions, not balancing books against statements.
What You Trade for Convenience
OAuth connections are not frictionless. You are adding a dependency. If your accounting platform's API goes down, your reconciliation tool cannot pull data. If the platform changes its OAuth scopes—which happens—your tool may need re-authorization.
You are also trusting the reconciliation tool to handle your data properly. Read-only access means it cannot change your books, but it can see everything you authorize. If the tool stores transaction data on its servers (many do, for caching and performance), you need to know where those servers are and how long the data persists.
Some platforms, notably Xero, have introduced AI training restrictions to prevent third-party apps from feeding customer accounting data into machine learning models. This reduces risk, but it also highlights the fact that OAuth access is powerful enough to require explicit restrictions.
When Manual Exports Make More Sense
If you reconcile quarterly, or if you are working with a one-off client whose data you will not touch again, OAuth setup is probably overkill. Manual CSV exports are also useful for historical reconciliation—matching data from before a platform migration, or reconstructing books from archived statements. The overhead of OAuth only pays off when the connection is reused.
The Connected Reconciliation Process
Once accounting platform sync is configured, the workflow condenses. You select the client from a list (if you manage multiple). You select the bank account. You pick a date range -- last week, last month, last quarter. The ReconcileIQ integration pulls live transactions from your platform and live statements from your bank feed (or uploaded statement), then matches them.
The results show what is already reconciled, what is missing from your books, and what should not be there. Because the data is live, you can push corrections immediately. No export, no import, no file version confusion.
This is where the value of connecting your accounting software compounds. Reconciliation stops being a quarterly cleanup exercise and becomes an ongoing process. You spot discrepancies when they are fresh, not three months later when memory has faded and the client has moved on.
Security Considerations Beyond OAuth
OAuth solves the password problem, but it does not solve the access problem. If someone gains access to your reconciliation tool account (via password reuse, phishing, or session hijacking), they can pull data from every connected platform.
This is why multi-factor authentication matters, even for tools that only read data. It is also why reviewing connected apps periodically is not paranoia—it is hygiene. Platforms like Xero and QuickBooks show you every active OAuth token. Use that list. Revoke anything you no longer recognize.
Third-party integrations expand the attack surface without explicit approval. OAuth tokens can become entry points if not governed properly. The challenge is not the protocol—it is the proliferation.
When Connection Overhead Is Worth It
If you manage one client and reconcile once per quarter, manual exports are fine. If you manage ten clients and reconcile monthly, OAuth pays for itself in the first month. If you manage fifty clients across multiple platforms, connected reconciliation is not a convenience—it is a necessity.
The break-even point is frequency. The more often you reconcile, the more friction manual exports create. OAuth removes that friction, but it introduces a different kind of overhead: setup, maintenance, and trust.
The question is not whether OAuth is better. It is whether the benefit justifies the dependency.
See Connected Reconciliation in Practice
ReconcileIQ supports OAuth connections to Xero, QuickBooks, Sage, Pandle, and FreeAgent—or manual CSV uploads if you prefer full control.
Try ReconcileIQWhat OAuth Actually Exposes — and What It Does Not
The most common concern about connecting accounting software is scope: exactly what data does the third-party tool gain access to? The answer depends on the platform, but the principle is consistent. OAuth tokens are scoped to specific permissions that you approve during the authorization flow. A reconciliation tool typically requests read access to bank transactions and chart of accounts. It does not receive access to payroll, tax filings, user credentials, or administrative settings.
Token expiry adds another layer of protection. Most accounting platforms issue short-lived access tokens (typically 30 to 60 minutes) alongside a longer-lived refresh token. The reconciliation tool uses the refresh token to obtain new access tokens silently, so you do not need to re-authorize. But if the refresh token itself expires or is revoked, the connection dies completely. Xero refresh tokens expire after 60 days of inactivity. QuickBooks tokens expire after 100 days. This means abandoned connections do not persist indefinitely — they degrade to a disconnected state on their own.
If you want to revoke access immediately, every major platform provides a connected apps page: Xero under Settings > Connected Apps, QuickBooks under Manage Your Apps, Sage under Linked Applications. Revoking the token is instant and does not affect your accounting data, your password, or any other connected app. It simply cuts one specific tool off from future API calls.
This is fundamentally safer than the alternative. When you share login credentials with a bookkeeper or tool, they have the same access you do — including the ability to modify data, change settings, and lock you out. OAuth eliminates that risk by design. The tool never sees your password, and you control exactly what it can read. Both the Xero App Marketplace and QuickBooks App Store review connected apps for security compliance before listing them, adding another layer of vetting.
Frequently Asked Questions
What exactly does OAuth give a reconciliation tool access to?
When you authorize a reconciliation tool via OAuth, it receives read-only access to your bank transactions, chart of accounts, and sometimes your outstanding invoices. It cannot modify data, delete anything, or access other parts of your accounting platform. You can revoke this access at any time from your platform's connected apps settings.
Is OAuth actually more secure than uploading CSV files?
Yes, but not for the reasons most people assume. OAuth means the reconciliation tool never sees your accounting platform password, and access can be revoked instantly without changing credentials. CSV files, by contrast, sit in Downloads folders and email attachments indefinitely. The real security benefit is controlled, auditable access versus untracked file proliferation.
Do I need to reconnect every time I reconcile?
No. Once connected via OAuth, tokens refresh automatically and remain active until you revoke access. You select the client, bank account, and date range for each reconciliation session, but the underlying connection persists.
When should I stick with manual CSV exports instead of connecting?
If you only reconcile quarterly, or if you're working with a one-off client whose data you won't touch again, the overhead of OAuth setup probably isn't worth it. Manual exports are also useful when you need to reconcile historical data from before your platform migration, or when dealing with platforms that don't offer API access.