Tax Levy & Rate Calculation
Calculate property tax levies across all 9 Ontario property classes with multi-tier rates, tax capping/clawback, exemptions, PILs, and special area charges — from council rate approval through individual property tax computation.
Batch Levy (50K)
Individual Calc
Rate Precision
Availability
Purpose-Built for Canadian Municipalities
Purpose & Scope
What this module owns
Clear ownership boundaries prevent duplication and ensure every capability has exactly one authoritative home.
Owns
8Delegated to
5Assessment values, property class
Rate table storage & versioning
Capping/clawback rules, exemption eligibility
Revenue GL posting
FIR Schedule 26 data
These capabilities are handled by dedicated modules and consumed via stable API contracts — keeping boundaries clean and ownership unambiguous.
Core Capabilities
What it does
3 capability groups comprising 9 discrete capabilities — each with API surface, business rules, and data ownership.
Maintain tax rates by year for all 9 Ontario property classes across multiple tiers with bylaw linkage and rate history.
9 Property Classes
Maintain rates for RT, MT, CT, IT, PT, FT, MF, R1, N1 — each with distinct mill rate.
Multi-Tier Rates
General municipal, special area (BIA), education, transit, and urban service area rate tiers per class.
Bylaw Linkage
Each rate year linked to authorizing council bylaw for legislative traceability.
Rate History
Full rate history with year-over-year comparison for council presentations.
Tax ratios per property class per Municipal Act s.308–310 with ratio range compliance and revenue-neutral analysis.
Ratios Per Class
Define tax ratios per property class as required by Municipal Act s.308–310.
Range Compliance
Validate ratios against provincially mandated ranges; alert on non-compliance.
Revenue-Neutral Analysis
Calculate revenue-neutral ratios when assessment values change between years.
Every module owns a single bounded context, exposes stable APIs, and can be composed into any Civic product — that's the architecture that scales.
Krutik Parikh
Creator of Civic
Data Model
Entity Architecture
4 entities with 4 relationships — the authoritative schema for this bounded context.
Entities
Select an entity to explore its fields and relationships
API Surface
Integration Endpoints
10 RESTful endpoints across 5 resource groups — plus 5 domain events for async integration.
/api/v1/tax-rates/{year}
Get all rates for a tax year
/api/v1/tax-rates/{year}
Set rates for a tax year
/api/v1/tax-rates/{year}/approve
Approve rates (link to bylaw)
Ecosystem
Products that depend on this module
2 Civic products consume Tax Levy & Rate Calculation — making it one of the most critical platform services in the ecosystem.
Technical Specifications
Performance, Compliance & Configuration
Batch Levy Calculation (50,000 properties)
Individual Levy Calculation
Rate Precision
Audit Trail
Availability
FAQ
Frequently Asked Questions
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