A sync error between a CRM and a marketing tool means a contact gets an email late. A sync error between a CRM and an accounting system means a customer gets billed twice, or a payment gets applied to the wrong invoice, or a write-off lands in the wrong reporting period. The stakes are different, so the fix needs to be different too: catching the error after the fact through reconciliation, not just monitoring whether the sync ran.
The specific ways revenue data breaks
Identity mismatches
A CRM identifies a customer by an internal ID. Accounting software identifies the same customer by a tax ID, a billing name, or its own customer number. When those identifiers do not map one to one, a sync creates a second customer record instead of updating the first, and every invoice booked against it splits the customer's history in two.
Field ownership disputes
Sales stage belongs to the CRM. Payment status belongs to accounting. When that split is not explicit, a rep marking a deal "closed won" and a bookkeeper marking an invoice "paid" can both be writing to the same downstream revenue field, and whichever write lands last wins, silently.
Late or out-of-order events
A refund processed in accounting and a subscription downgrade processed in the CRM within the same hour do not always arrive at the other system in the order they happened. Applied out of order, the two systems can each compute a different current balance from the same two events.
Key takeaway: None of these three failures show up as a sync error message. Each one produces a record that looks synced and is wrong, which is why monitoring the sync job is not the same as verifying the data.
Why reconciliation is the actual fix
Sync monitoring answers one question: did the write succeed. Reconciliation answers a different one: do the two systems currently agree, checking record counts, relationships, and financial totals against each other rather than just confirming each individual write went through. That second question is the one that catches identity mismatches and ownership disputes, because both of those produce writes that technically succeed while still being wrong.
Infrakinetic runs that discipline on its own financial data by default. Financial migrations and ongoing operations both go through the same reconciliation pass, checking totals and record counts between source and destination before anything is called complete, because a rounding difference or a duplicated invoice is exactly the kind of error that a successful sync log will not show you.