EazLink guide
How long does a BIR EIS integration project take?
A phase-based way to estimate BIR EIS work without promising a date before the taxpayer, data and certification path are known.
Updated 2026-09-06 by the EazLink team. Editorial review: EazLink Editorial Team.
Direct answer
There is no honest universal duration. A project with one clean source system and ready taxpayer documents can move much faster than a multi-entity retail group with several POS products. Estimate separate phases for scope confirmation, data mapping, connector development, internal testing, official certification work, production preparation and branch rollout.
What to remember
- Count systems, entities and exception types before estimating.
- Official access and review time are external dependencies.
- Data cleanup often starts later than it should.
- Pilot and rollout are different phases.
What changes the schedule
The largest delays usually come from scope and source data, not from writing an HTTP request.
| Factor | Faster case | Slower case |
|---|---|---|
| Systems | One supported ERP | Several custom POS and legacy systems |
| Data | Required fields already structured | Tax and branch data missing |
| Organization | One taxpayer and owner | Several entities and approval groups |
| Testing | Repeatable fixtures | Manual test data and changing scope |
| Rollout | One office | Many branches with weak networks |
Estimate by deliverable
Each phase needs an exit condition. Mapping finishes when required fields and ownership are approved, not when a workshop ends.
Connector development finishes when success and negative tests pass against a fixed contract. Certification support finishes according to the current official process, not an internal calendar date.
Expose external dependencies
List portal access, taxpayer documents, BIR environment availability, adviser decisions and source-vendor support as named dependencies.
Give each dependency an owner and escalation path. Hiding it inside a software estimate makes the plan look certain when it is not.
Use a small but real pilot
EazLink projects can start with one representative entity, source system and branch. The pilot should cover adjustments and service interruption as well as simple invoices.
Rollout planning begins after the pilot shows actual queue volume, error patterns and support effort.
Create a defensible estimate
- Count entities, branches and source systems.
- Score data readiness.
- List official and vendor dependencies.
- Define phase exit criteria.
- Separate pilot, certification and rollout dates.
Quick questions
Can a provider promise a fixed certification date?
A provider can estimate its own work but cannot control official review, portal availability or the BIR decision.
What should happen first?
Confirm taxpayer scope and inspect real source data before committing to a connector schedule.
Can all branches launch at once?
They can, but a phased rollout usually gives the team time to learn from real exceptions and connectivity conditions.
Continue the preparation
Sources and verification
Check the current BIR rules and portal notices before making a compliance decision.