Between 55% and 70% of CRM implementations fail to meet their original objectives. Not because the software was wrong — but because the migration was underestimated.
The pattern is predictable. A team picks a new CRM, gets excited about clean dashboards and better reporting, then rushes to “just move everything across.” Three weeks later they’re dealing with duplicate contacts, broken automations, missing deal history, and a sales team that quietly goes back to spreadsheets.
A real example: a 25-person SaaS company migrated 180,000 contacts from Salesforce without running a deduplication pass first. The result was 54,000 duplicate records in their new system — a 30% duplication rate that cost over $23,000 in lost productivity and 120 hours of manual clean-up work. That damage was entirely preventable.
Here are the seven things that most commonly go wrong in a CRM migration:
- Data loss — records, attachments, or field values that simply vanish during transfer
- Dirty data — duplicates, incomplete records, and inconsistent formatting that get amplified in the new system
- Broken automations — workflow rules that worked in the old CRM but don’t have an equivalent in monday.com
- Broken integrations — connected tools (email, accounting, support desk) that stop syncing
- Poor team adoption — people who avoid the new system because they weren’t trained or consulted
- Timeline overruns — what was supposed to take two weeks drags into two months
- Replicating a broken setup — copying a messy, outdated CRM structure into a clean new platform instead of redesigning for how the business actually works today
This checklist is built from real migration experience across HubSpot, Salesforce, Pipedrive, Zoho, and spreadsheet-based systems. Six phases, 47 items, nothing generic. Every item is specific enough to act on immediately.
Decide What You're Actually Moving
Week 4–2 Before Go-LiveThis is the most skipped phase and the root cause of most failures. Before you touch a single record, you need a complete inventory of what exists and a deliberate decision about what deserves a place in your new system.
Export a complete record count from your current CRM
Contacts, companies, deals, activities, notes, attachments, email logs. Write the numbers down. This is your verification baseline after migration.
Identify every data category in your current system
Not just contacts. Include: sales pipeline data, marketing campaign history, customer service tickets, contracts and attachments, historical reports, user permissions and activity logs, custom fields and their values.
Make the archive vs. migrate decision for each data category
Records with zero activity in 2+ years — migrate, archive offline, or delete? This decision directly affects your monday.com contact count and therefore your plan costs.
List every team that uses the current CRM and what they use it for
Sales, marketing, ops, finance, support — each has different data they care about losing.
Identify your “golden records”
The 20% of data (key accounts, active deals, recent contacts) that absolutely cannot have a single field wrong. These get manually verified post-migration regardless of automation accuracy.
The temptation is to migrate everything. Resist it. Migrating dirty, outdated data into a clean new system just moves the mess. This is the moment to leave it behind.
Audit and Clean Before You Move Anything
Week 3–2 Before Go-Live70% of CRM migration failures trace back to inadequate pre-migration data cleansing. The typical B2B CRM has a 15–30% duplicate rate. Cleaning before export is dramatically easier than cleaning after import.
Run a deduplication pass on your current CRM before export
Not after import. Merging duplicates in monday.com is manual and painful. Do it now while you still have your old CRM's dedup tools.
Define mandatory field standards for every record
Valid email format, company name present, deal stage assigned, phone number in correct format with country code. Any record that doesn't meet the standard gets fixed or excluded.
Check for platform-specific data format issues that will break the import
Full names stored as one field need splitting into first/last name. Phone numbers without country codes import incorrectly. Date fields in DD/MM/YYYY vs MM/DD/YYYY formats corrupt chronological data. Single address blocks need separating into street, city, state/county, postcode, country. Multi-select fields may not have a direct equivalent.
Create a field mapping spreadsheet
Three columns: Source field (current CRM name) → Destination field (monday.com column) → Transformation rule (any reformatting required). Every field needs a row. No exceptions.
Decide what to do with unmappable fields
Fields in your current CRM that have no equivalent in monday.com. Options: create a new custom column, store as a note, or accept the data won't migrate. Document the decision for each.
Design the Monday.com Structure Before Importing Data
Week 2 Before Go-LiveA common and expensive mistake: importing data into monday.com's default structure, then trying to redesign around it. Build the structure first, import into it second.
Set up your monday.com boards, columns, and groups to match your field mapping spreadsheet
Do this before any data is imported. Your board structure should reflect the field mapping decisions from Phase 2, not monday.com's default templates.
Configure user permissions and seat assignments
Know who gets edit access vs. view-only before migration. If migrating from monday.com Work Management to monday.com CRM, all teammates on Work Management boards become viewers automatically and must be manually reassigned as members.
Build and test your automation rules with dummy data
Before live data arrives. Common automations to rebuild: lead assignment rules, deal stage notifications, activity reminders, pipeline progression triggers, integration sync rules.
Identify automations that need Make.com
Some automations from your old CRM cannot be rebuilt natively in monday.com. Map these out now — they add implementation time.
Verify every integration is available
Check natively or via Make.com: email sync (Gmail/Outlook), calendar, accounting software (Xero/QuickBooks), support desk, Slack/Teams, any marketing automation tools. If any integration is not available, find the workaround now — not after go-live.
Set up mandatory fields in monday.com
So new records created post-migration enforce your data quality standard from day one.
If your current CRM relies heavily on workflow automations, rebuilding them is often the most time-consuming part of the migration. Our AI-powered automation service can map your existing rules and rebuild them in monday.com or Make.com significantly faster than doing it manually.
Not sure how complex your migration will be?
The complexity of a CRM migration depends on your data volume, the number of automations you're running, and how many integrations need rebuilding. Our free Migration Readiness Quiz takes 3 minutes and gives you a personalised complexity score.
Take the Free QuizTest Migration
Days 7–3 Before Go-LiveNever migrate everything in one shot without a test run. This phase saves the rollback. It is the single most effective way to catch problems before they reach your live data.
Export a 10% sample of your data and import it into monday.com
Cover all record types — don't just test contacts. Include deals, companies, activities, notes.
Verify every field in the sample against your mapping spreadsheet
Not spot-checking. Every field for every test record. This is where format mismatches and transformation errors surface.
Test specifically for edge cases
Records with special characters and unusual formats. Contacts with missing optional fields. International records with non-standard address formats. Your oldest legacy records and your most recently updated records.
Run every automation rule against the test data
Verify it fires correctly — not just that it fires, but that it fires with the right values and at the right time.
Give 2–3 power users access to the test data
Ask them to find something wrong. They will. That is the point. Real users find problems that checklists miss.
Document every issue found and resolve it before full migration
Update the mapping rules or board configuration. Never proceed to full migration with unresolved test issues.
Go-Live
Migration DayEverything validated. Structure built. Team briefed. This is execution — follow the process you tested, verify the results, and communicate clearly.
Schedule the migration during the lowest-activity window
Avoid Monday mornings, month-end, quarter-end, and any known peak trading periods.
Communicate the migration window to the whole team
At least one week in advance. People need to know the system will be in transition.
Lock the legacy CRM to prevent new data entry
Read-only mode during the migration window. Any records created in the old system while migration is running will not be in monday.com.
Execute the full migration using the same process validated in testing
Verify record counts against your Phase 1 baseline
Total contacts imported vs. total exported, total deals, total companies. If the numbers don't match, stop and investigate before anything else.
Run a spot-check on 5–10% of migrated records
Compare them field by field against the source records in your old CRM.
Confirm all automations are firing correctly with real data
Reconnect and test every integration individually
Do not assume they transferred. Test each one: email sync, calendar, accounting, support desk.
Send a go-live communication to the team
Clear instructions: what to use from today, what not to use, and who to contact if something looks wrong.
Post-Migration
Weeks 1–4The migration isn't done on go-live day. Most failures surface in the first two weeks. This phase is where you protect the investment you've just made.
Keep the legacy CRM live in read-only mode for a minimum of 30 days
Do not cancel the subscription or delete the data until the team has confirmed nothing is missing in monday.com.
Run a formal data verification at Day 7
Pull a report in monday.com and compare it to the equivalent report in your old CRM. Revenue figures, deal counts, pipeline totals. Any discrepancy is a data migration issue that needs resolving now, not at month-end.
Deliver role-specific training sessions
Not one generic walkthrough. Sales reps need to know how to log activities and move deals. Managers need to know how to run pipeline reports. Keep each session under 45 minutes and focused on what that person does daily.
Collect structured feedback at Day 7 and Day 30
What's missing, what's confusing, what's not working as expected. Address issues immediately — the longer problems persist, the more likely people are to build shadow systems (spreadsheets, notes apps) that undermine your data quality.
Archive the legacy CRM data export files securely
In a secure shared location — not just on someone's laptop — before the old subscription is cancelled.
Cancel the legacy CRM subscription only after all of the above is confirmed
What Makes the Difference
Following this checklist doesn’t guarantee a perfect migration. But it does eliminate the most common and most costly failure modes — the ones that turn a two-week project into a two-month fire drill.
The biggest predictor of migration success is not technical. It’s whether someone owns the project end to end and has the authority to enforce data standards and keep the team accountable during the transition.
If any phase above made you think “we don’t have the time or resource to own this properly” — that is exactly the situation our data migration service exists for. We handle the field mapping, data cleansing, test migrations, and go-live execution so your team can focus on running the business.
Want to talk it through first? Book a free consultation and we’ll walk through your specific situation — no commitment required.
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