Blog·June 1, 2026
How Many Duplicate Contacts Does Your Law Firm Actually Have?
Most law firm administrators have a number in their head when asked about duplicate contacts in their Clio account. Maybe 20. Maybe 50 if the firm has been around a while. The real number is almost always higher than the guess.
Sometimes a lot higher.
Why the gut estimate is wrong
The reason isn't that anyone's bad at estimating. It's that duplicate contacts don't pile up in one obvious place. They scatter.
A few common patterns:
A new associate creates a contact for opposing counsel they've worked with for years, because the existing record was entered with a middle initial they didn't know to search for.
A paralegal imports a list from a referral source. Half the names are already in Clio, but the import doesn't know that. Now every one of those people exists twice.
A receptionist takes an intake call, can't find the prospective client in Clio because they spelled the last name differently, and creates a new record. Two months later the same person becomes an actual matter under a different contact.
A firm migrates from another system. The migration brings in every contact from the old system, including the ones already in Clio.
None of these are unusual. Most firms have done all four.
What the actual numbers look like
Across firms that have run a MERGEguard scan, the typical duplicate rate sits somewhere between 8% and 20% of total contacts. A firm with 5,000 contacts is usually looking at 400 to 1,000 duplicates. A firm with 25,000 contacts can have 2,000 to 5,000.
These aren't fringe cases. They're the average.
The bigger the firm and the longer the Clio account has been active, the worse the ratio tends to get. Smaller firms often assume they're immune because the team is small. But duplicate rate doesn't track with firm size. It tracks with how long the data has been accumulating and how many different people have touched it.
A solo attorney three years into Clio can have just as much percentage-wise duplication as a 40-person firm with the same tenure. They have less total data, so the absolute count is smaller, but the mess is proportional.
Why this matters more than it sounds
A duplicate contact isn't just a tidiness problem. Each duplicate is a place where information about a real person is split across two records that don't know about each other.
The client who called last week is at one address in one record and a different one in the other. The opposing counsel email you need is on the contact you didn't search for. The conflict check misses because the relevant matter is tied to the duplicate record, not the canonical one.
For litigation firms doing real conflict screening, this is the most expensive failure mode. Two contacts for the same person means a conflict can hide in plain sight, because the system has no idea those records are the same human.
For transactional or estate practices, it's a service problem. The client who told you about their address change three years ago is annoyed when their bill goes to the old place. They told you. You wrote it down. Just on the wrong record.
The honest answer is to count them
Guessing the number doesn't help. Looking at Clio's built-in duplicate finder only catches the records that are nearly identical, which isn't most duplicates.
The actual answer requires looking at every contact, comparing each one to every other one, and applying enough matching logic to catch the misspellings, the missing middle initials, the formatting differences, and the cases where one record has a phone number and the other has an email and they're the same person.
MERGEguard runs that full comparison for you. Connect your Clio account through Clio's standard OAuth and the free scan counts your contacts, so you see the size of what you're working with and what a full scan costs, before you spend anything. The scan is read-only. Nothing changes in your Clio data.
Getting the real duplicate number takes the deeper matching pass described above, and that runs once you start a full scan. The count is almost always higher than firms guess. Sometimes considerably higher.
From there you can decide whether it's worth doing something about. Most firms decide it is.