Open the vendor record you want to keep and the one you want to get rid of, note the exact name on the record you're keeping, then edit the duplicate's name field to match it exactly, character for character, and save. QuickBooks treats the identical name as a signal to merge the two records into one, combining both vendors' transaction history under the surviving name. This can't be undone, so confirm which record you're keeping before you start.
1. Identify which vendor record to keep. Usually the one with more transaction history, correct contact details, or the one already tied to 1099 tracking if that matters for this vendor. Everything ends up under this record's name.
2. Copy its exact display name. Open the vendor you're keeping and copy the name field exactly as it appears, spacing, abbreviations, and punctuation included. A mismatch of even one character means QuickBooks won't merge them.
3. Open the duplicate vendor record. Go to Expenses > Vendors, find the one you want to merge away, and select Edit.
4. Change its name to match exactly, then save. Paste in the exact name from step 2 and save the record. QuickBooks detects that two vendors now share an identical name and asks you to confirm merging them into one.
5. Confirm the merge. QuickBooks shows a warning that this can't be undone. Once you confirm, the duplicate's transaction history moves under the surviving vendor record, and the duplicate itself disappears from your vendor list.
6. Spot-check the surviving vendor's history. Open a report like Vendor Transaction List for that vendor and confirm transactions from both original records are present and nothing looks duplicated or missing.
Merging fixes one instance of the problem; it doesn't stop the next duplicate from getting created. The usual cause is someone entering a bill or expense and typing a new vendor name instead of searching for the one that already exists, "ABC Supply" versus "ABC Supply Co." versus "ABC Supply, Inc.", each looking different enough to QuickBooks that it creates a third record instead of matching an existing one.
A business that's merged the same vendor two or three times over the years usually has a vendor-entry habit problem, not a one-time cleanup problem. Fixing the habit (a consistent naming convention, or checking for an existing match before adding a new vendor) prevents more of this than periodically cleaning up duplicates after they've already polluted months of reports.
A new vendor name gets checked against the existing list for a close match (not just an exact one) before it's saved, catching "ABC Supply" versus "ABC Supply Co." at entry instead of after months of split transaction history.
Vendor names, tax IDs, and contact details stay in sync with a separate system of record, a procurement tool or an AP automation platform, instead of drifting apart and creating new duplicates over time.
Tell us roughly how often this comes up, and we'll tell you if it's worth catching automatically instead of fixing after the fact.
Tell us how duplicates keep sneaking in, a naming habit, multiple people entering bills, an import that doesn't match existing records, and we'll tell you if it's catchable before it happens again. Vendor cleanup is one example of manual upkeep; we automate whatever's eating time in your business, not just this.
Let's talk →Yes, the mechanism is identical: rename one customer record to exactly match the other's name, and QuickBooks offers to merge them. It's a separate list from vendors, so merging a vendor doesn't touch your customer list at all, and vice versa.
No. Once confirmed, a merge is permanent; the two records become one and there's no built-in undo. If you merged the wrong way (kept the record you meant to delete), the only real fix is manually recreating the vendor you lost and reassigning transactions, which is slow and error-prone, so double-check which name you're keeping before you confirm.
The surviving vendor record's 1099 settings are what apply going forward; whatever was set on the record that disappears doesn't carry over separately. After merging a vendor you track for 1099 purposes, open the surviving record and confirm Track payments for 1099 is still checked and the tax ID is correct.