CRM migration
Field-level mapping, validation, and rollback between Bill4Time and Odoo CRM. We move data and schema; workflows are rebuilt natively in Odoo CRM.
Bill4Time
Source
Odoo CRM
Destination
Compatibility
12 of 12
objects map 1:1 between Bill4Time and Odoo CRM.
Complexity
BStandard
Timeline
48–72 hours
Overview
Bill4Time organizes work around Clients, Projects (matters), Time Entries, Expenses, and Invoices — a model built for legal and professional services billing. Odoo CRM uses res.partner for both contacts and companies, crm.lead for leads and opportunities, and the accounting module for invoicing — a genuinely different architecture that treats billing as a downstream output of sales and project delivery rather than the primary record. We extract Bill4Time data via the read-only v1 and v2 APIs (OData filter support), map clients to res.partner with full address and contact detail preservation, map matters (projects) to crm.lead opportunities with the original project name stored in a custom field, and preserve time entries as account.analytic.line records linked to the partner and opportunity. Invoice history migrates to account.move with original invoice numbers, dates, and amounts. Custom fields (Enterprise Add-On only in Bill4Time) map to Odoo custom fields via ir.model.fields. Workflows, timers, and automation rules do not migrate — they must be rebuilt in Odoo using studio actions or Python modules. Our migration uses a sample-first approach: we validate field-level mapping against a representative slice before committing the full dataset, and we run a delta-pickup window to capture any records modified during cutover.
Every standard and custom field arrives verified.
AI proposes the map; you confirm before any record moves.
Parent–child, lookups, and ownership stay linked.
Calls, emails, meetings — with original timestamps.
Documents, uploads, and inline notes move with the record.
Why teams make this switch
Leaving
What's pushing teams away
Choosing
What's pulling them in
Object mapping
Each row shows how a Bill4Time object lands in Odoo CRM, including any object-level transformations, lookup resolution, or schema-design dependencies.
Typical mapping — final map is confirmed during the sample migration step.
Bill4Time
Client
Odoo CRM
res.partner
1:1Bill4Time clients map to Odoo res.partner records. We preserve clientName as name, billingName as display_name override, and all address fields (address1/2/3, city, state, country, postalCode). The clientType field populates a custom partner_category_id for segmentation. Active/Disabled status maps directly to Odoo's active flag.
Bill4Time
Client customFields
Odoo CRM
res.partner (custom fields)
1:1Bill4Time Enterprise Add-On custom fields on clients (text, number, date, list, client list, user list types) migrate as Odoo ir.model.fields x_name definitions on res.partner. List-type custom fields require value-mapping to Odoo selection fields or many2one relations depending on the source field's data type. JSON customFields payload is parsed and exploded into individual field writes.
Bill4Time
Project (Matter)
Odoo CRM
crm.lead
1:1Bill4Time projects map to Odoo crm.lead as opportunities. projectName becomes name, description carries over, clientId links to the corresponding res.partner via partner_id. billingMethod (Hourly/Flat Fee/Percentage) is stored in a custom Char field since Odoo opportunities lack a native billing method attribute — flat-fee deals may alternatively generate sale.order records if Odoo Sale app is active.
Bill4Time
Project customFields
Odoo CRM
crm.lead (custom fields)
1:1Bill4Time project-level custom fields migrate as custom fields on crm.lead. Fields such as hourlyOverrideRate, hourlyOvertimeOverrideRate, and billingMethod require corresponding Odoo custom Float and Selection fields. The projectType values are mapped via value_mapping to existing stage names in Odoo, or alternatively stored as a custom Char field for reference preservation during reporting.
Bill4Time
Time Entry
Odoo CRM
account.analytic.line
1:1Bill4Time time entries map to Odoo account.analytic.line (timesheet) records linked to the project (project_id) and the assigned user (user_id). entryDate becomes date, billableAmount populates unit_amount, and activityType sets the analytic line's name. isBillable flag preserves billability for reporting. Unbilled entries link to the crm.lead opportunity; already-invoiced entries link to the account.move.
Bill4Time
Invoice
Odoo CRM
account.move
1:1Bill4Time invoices migrate to Odoo account.move records with move_type='out_invoice'. invoiceDate becomes invoice_date, invoiceAmount populates amount_total, laborAmount and expenseAmount are preserved in line amounts. invoiceNumber maps to Odoo's name sequence field. prebill status becomes draft; finalized maps to posted. paidStatus drives the move state: paid maps to posted with reconciled payments, partially paid creates a partial reconciliation.
Bill4Time
Expense Entry
Odoo CRM
hr.expense
1:1Bill4Time expense entries map to Odoo hr.expense records if the HR/Expense app is active. expenseAmount becomes unit_amount, expenseType maps to product_id via a value-mapping table (e.g., 'Mileage' → mileage product, 'Travel' → travel product). clientId links the expense to the relevant res.partner. If hr.expense is not activated, expenses are stored as custom fields on crm.lead.
Bill4Time
User
Odoo CRM
res.users
1:1Bill4Time users map to Odoo res.users by email match. fname/lname populate name, email maps to login. userType (System Admin, Office Admin, Standard User, Limited User, Financial User) requires Odoo access rights mapping: System Admin → Group / System, Standard User → Group / User, Limited User → Group / Public. billingRate and overtimeRate store in custom fields on res.users for timesheet rate lookup.
Bill4Time
Project → User Assignment
Odoo CRM
project.user.ids
1:1Bill4Time assignedTo on projects maps to Odoo project team members. assignedTo is a single user in Bill4Time; Odoo project allows multiple members. We create the project with the primary assigned user and add additional members from any secondary assignments found in custom fields or notes. Unmatched user IDs are flagged for admin resolution before migration.
Bill4Time
Account Manager
Odoo CRM
res.partner.user_id
1:1Bill4Time accountManagerId on clients maps to Odoo res.partner.user_id (the responsible salesperson field on the partner). This ensures the account manager is automatically assigned as the Odoo sales representative on the partner record, driving automated lead routing if Odoo's team assignment rules are active.
Bill4Time
Attachment/File
Odoo CRM
ir.attachment
1:1Bill4Time documents attached to clients or projects migrate as Odoo ir.attachment records linked to the corresponding res.partner or crm.lead via res_model and res_id. Inline images in notes are downloaded and re-hosted in Odoo's filestore. Maximum file size follows Odoo's ir_attachment size limits; files exceeding the threshold are flagged for manual download links stored in a custom URL field.
Bill4Time
Workflow / Automation Rules
Odoo CRM
None
1:1Bill4Time workflow templates and automation rules do not have a destination equivalent in Odoo CRM. These must be rebuilt using Odoo Studio (for simple rules), Python server modules, or the OCA/automation-tools community modules. We export your Bill4Time workflow definitions as a structured JSON reference document to hand to your Odoo administrator for recreation.
| Bill4Time | Odoo CRM | Compatibility | |
|---|---|---|---|
| Client | res.partner1:1 | Fully supported | |
| Client customFields | res.partner (custom fields)1:1 | Fully supported | |
| Project (Matter) | crm.lead1:1 | Fully supported | |
| Project customFields | crm.lead (custom fields)1:1 | Fully supported | |
| Time Entry | account.analytic.line1:1 | Fully supported | |
| Invoice | account.move1:1 | Fully supported | |
| Expense Entry | hr.expense1:1 | Fully supported | |
| User | res.users1:1 | Fully supported | |
| Project → User Assignment | project.user.ids1:1 | Fully supported | |
| Account Manager | res.partner.user_id1:1 | Fully supported | |
| Attachment/File | ir.attachment1:1 | Fully supported | |
| Workflow / Automation Rules | None1:1 | Fully supported |
Gotchas + challenges
Platform-specific issues from each side, plus the pair-specific challenges that don't show up on either platform's page on its own.
Bill4Time gotchas
API is read-only with no write endpoints
Enterprise Add-On gates Custom Fields and unlimited imports
Invoice status divergence between reports and accounting page
Odoo CRM gotchas
Odoo.sh version gating blocks assisted migrations from trial
Enterprise modules fail to install on Community after database restore
Custom module view inheritance breaks between Odoo major versions
Custom fields risk losing their application context on Community
API access for Community is gated behind the Custom Plan
Pair-specific challenges
Migration approach
Profile Bill4Time data via read-only API
We authenticate against Bill4Time's v2 API using your API key, run $select queries on /v2/clients, /v2/projects, /v2/timeEntries, /v2/invoices, and /v2/users to count records and sample field values. We parse the customFields JSON blobs to inventory every unique custom field name and data type. The profile output includes record counts per object, null-rate analysis per field, and identification of records with missing foreign-key targets (orphaned time entries, invoices without clients).
Design Odoo schema and custom fields
Based on the data profile, we create Odoo custom fields on res.partner (client custom fields), crm.lead (project and billing method fields), account.analytic.line (labor time and billability fields), and res.users (billing rate fields). If the Project module is not active, we configure the migration to route time entries to tasks instead. We generate a schema setup checklist with Odoo field names, types, and default values that your admin applies before data lands.
Resolve user and client cross-references
Bill4Time IDs do not exist in Odoo — we resolve foreign keys by creating lookup tables. Users are matched by email to Odoo res.users.login. Clients are matched by clientName to res.partner.name. Projects are resolved to the newly created crm.lead.id. Any Bill4Time IDs that cannot be resolved (deleted users, archived clients with active time entries) are flagged in a pre-flight report; your team decides whether to create placeholder records or exclude the orphaned entries.
Run sample migration with field-level diff
We migrate a representative slice — typically 50–200 records per object type covering edge cases (inactive clients, flat-fee projects, overtime time entries, paid and unpaid invoices). We generate a field-level diff CSV showing source value, mapped destination value, and pass/fail status for each field. You review the diff and approve or adjust the mapping before the full run commits. This step catches incorrect state_id country mappings, missing product configurations for expense types, and billing method edge cases.
Execute full migration with delta-pickup window
The full migration runs in ordered batches: Users → Clients → Projects → Time Entries → Invoices → Expenses. Foreign key dependencies are enforced by batch ordering. A delta-pickup window (24–48 hours) runs concurrently with your final Bill4Time use, capturing any records created or modified during the cutover. All operations are logged to an audit table with source record ID, destination record ID, operation type, and timestamp. One-click rollback reverts all destination records to pre-migration state if reconciliation fails.
Platform deep dives
Bill4Time
Source
Strengths
Weaknesses
Odoo CRM
Destination
Strengths
Weaknesses
Complexity grading
Standard CRM migration. 1 of 8 objects need a mapping; the rest are 1:1.
Overall complexity
Standard migration
Derived from compatibility, mapping clarity, API constraints, and data volume across Bill4Time and Odoo CRM.
Object compatibility
1 of 8 objects need a mapping; the rest are 1:1.
Field mapping clarity
Field mapping is derived from defaults — final spec confirmed during the sample migration.
Timeline complexity
8-object category — typical timelines run 2–7 days end-to-end.
API constraints
Bill4Time: Not publicly documented — confirm with Bill4Time support during scoping. The vendor's API reference does not publish per-minute or per-day request ceilings..
Data volume sensitivity
Bill4Time doesn't expose a bulk API — REST + parallelization used for high-volume runs.
Estimator
Rule-based pricing — no per-record fees, no manual quotes. Migrations over 2M records are scoped individually.
Step 1
Pick a category, then your source and destination platforms.
Category
FAQ
Answers to the questions buyers ask most during Bill4Time to Odoo CRM migration scoping. Not seeing yours? Book a call.
Walk through your Bill4Time to Odoo CRM migration with a real engineer — 30 minutes, free, written quote within 24 hours.
Book a free 30 minute consultationAdjacent paths
Other ways to leave Bill4Time
Other ways to arrive at Odoo CRM
Ready when you are
Tell us record counts and timeline. We'll come back with a written quote inside 1 business day — no commitment, no sales pitch.