How property tax works in Canada
Property tax is calculated in two steps:
- Assessment: A provincial agency determines your property’s assessed (market) value.
- Tax rate: Your municipality applies a tax rate (mill rate) to the assessed value.
Property tax = Assessed value × Municipal tax rate
You cannot appeal the tax rate — that’s set by your municipal council. But you can appeal the assessed value if you believe it’s inaccurate.
Who assesses your property?
| Province | Assessment body | Assessment cycle |
|---|---|---|
| Ontario | Municipal Property Assessment Corporation (MPAC) | Every 4 years (currently frozen at 2016 values, review pending) |
| British Columbia | BC Assessment | Annual (based on July 1 market value) |
| Alberta | Municipal assessors | Annual |
| Quebec | Municipal evaluation roll | Every 3 years |
| Manitoba | Provincial Municipal Assessor | Every 2 years |
| Saskatchewan | Saskatchewan Assessment Management Agency (SAMA) | Every 4 years |
| Nova Scotia | Property Valuation Services Corporation (PVSC) | Annual |
| New Brunswick | Service New Brunswick | Annual |
| PEI | Provincial Tax Commission | Annual |
| Newfoundland & Labrador | Municipal Assessment Agency | Varies |
When to appeal: the decision framework
Signs your assessment may be too high
| Red flag | What to check |
|---|---|
| Assessed value exceeds comparable sale prices | Compare 3–5 similar homes that sold in the past 12 months within 1 km |
| Factual errors on the assessment | Check square footage, lot size, bedrooms, bathrooms, finished basement, garage, pool |
| Property condition not reflected | Major defects (foundation issues, environmental contamination, flood damage) not captured |
| Neighbourhood factors | Proximity to highways, commercial properties, or nuisances not accounted for |
| Recent decline in local market | If market dropped since the assessment date, values may be overstated |
| Major renovation assumed but not done | Assessment may include upgrades you haven’t made |
When NOT to appeal
| Situation | Why |
|---|---|
| Your assessed value matches comparable sales | You’ll lose — the assessment is correct |
| You just want lower taxes | If the value is fair, the appeal will fail |
| Your neighbourhood is appreciating | Rising values justify a higher assessment |
| The difference is minor ($5,000–$10,000) | Tax savings may not justify the effort |
Is it worth the effort?
Quick math: If your assessment is $50,000 too high and your municipal tax rate is 1.0%:
- Annual tax savings: $500/year
- Over a 4-year assessment cycle (Ontario): $2,000 total
- Time investment: 5–15 hours of research and appeals
For larger discrepancies, the savings compound significantly:
| Over-assessment | Tax rate 0.8% | Tax rate 1.0% | Tax rate 1.2% |
|---|---|---|---|
| $25,000 | $200/year | $250/year | $300/year |
| $50,000 | $400/year | $500/year | $600/year |
| $100,000 | $800/year | $1,000/year | $1,200/year |
| $200,000 | $1,600/year | $2,000/year | $2,400/year |
Province-by-province appeal process
Ontario (MPAC)
Step 1 — Request for Reconsideration (RfR)
- Free — no cost to file.
- Submit within the deadline shown on your Property Assessment Notice (typically March 31 of the tax year).
- MPAC reviews your property record and comparable sales.
- Decision within 180 days.
- Approximately 50% of RfRs result in some adjustment.
Step 2 — Assessment Review Board (ARB)
- File if the RfR doesn’t resolve the issue.
- Filing fee: $125.50 for residential properties (under $1M assessed value).
- Formal hearing — you present evidence, MPAC presents their case.
- Success rate: approximately 25–30% of hearings result in a reduction.
- You can hire a property tax consultant or lawyer to represent you.
Key evidence to prepare:
- 3–5 comparable sales near the assessment date (January 1 of the assessment cycle year).
- Document any factual errors in MPAC’s property record.
- Photos showing condition issues that affect value.
- Independent appraisal (optional but strengthens your case).
Ontario note: MPAC assessments are currently frozen at 2016 values. A province-wide reassessment has been delayed multiple times. When it occurs, expect significant value changes in many markets.
British Columbia
Step 1 — Complaint to Property Assessment Review Panel
- Deadline: January 31 (31 days after assessment notice).
- Filing fee: $30 for residential.
- Panel hearing is relatively informal — present evidence of market value as of July 1 of the assessment year.
- Success rate: 45–55% result in some change.
Step 2 — Appeal to Property Assessment Appeal Board (PAAB)
- File within 21 days of the Panel decision.
- Filing fee: $50 for residential.
- More formal hearing.
- Can hire a representative.
Key evidence:
- Comparable sales close to July 1 valuation date.
- Property errors (finished area, lot size, building age).
- Recent MLS listing data if property was listed and received lower offers.
Alberta
Step 1 — Complaint to municipal Assessment Review Board (ARB)
- Deadline: Varies by municipality — typically 60 days after assessment notice (often March–April).
- Filing fee: $50–$100 (varies by municipality).
- Hearings are relatively informal.
- Success rate varies — larger discrepancies have better outcomes.
Key evidence:
- Comparable sales for the assessment period.
- Equity comparisons — if similar properties nearby are assessed lower.
- Condition evidence (photos, inspection reports).
Quebec
Step 1 — Request for Review (Demande de révision)
- File with the municipal assessor within May 1 of the first year of the new assessment roll (rolls are updated every 3 years).
- No filing fee for the initial request.
- Municipal assessor reviews and responds.
Step 2 — Tribunal administratif du Québec (TAQ)
- File within 60 days of the assessor’s response if unsatisfied.
- Filing fee: $105 for residential.
- Formal tribunal hearing.
Nova Scotia
Step 1 — Appeal to Property Valuation Services Corporation (PVSC)
- Deadline: Varies — check assessment notice (typically about 30 days).
- Contact PVSC to discuss your concerns first (informal resolution may be possible).
Step 2 — Nova Scotia Utility and Review Board (NSUARB)
- Formal appeal if PVSC informal resolution fails.
- Filing fee applies.
Building your appeal case
Step 1 — Get your property record
Request your full property record from the assessment authority. This shows what information they used to assess your property.
Check for errors in:
| Detail | Common errors |
|---|---|
| Lot size | Incorrect dimensions — compare to your survey |
| Finished living area | Includes unfinished space, or underestimates finished space |
| Number of bedrooms/bathrooms | Incorrect count |
| Basement status | Listed as finished when it’s not (or vice versa) |
| Building age | Incorrect construction year |
| Garage | Listed as attached when it’s detached, or wrong size |
| Pool / hot tub | Listed when removed |
| Property class | Listed as commercial/mixed when residential |
| Renovations | Listed that don’t exist, or unlisted ones that reduce value (e.g., removed a bathroom) |
Factual errors are the easiest wins — the assessment body will correct them without dispute.
Step 2 — Gather comparable sales
The strongest appeal evidence is comparable sales that prove your assessment is higher than fair market value.
Criteria for strong comparables:
- Sold within 6–12 months of the assessment date.
- Within 1 km of your property (closer is better).
- Similar size, lot, age, and style.
- 3–5 sales minimum — one outlier sale won’t be convincing.
Where to find comparable sales:
| Source | Access |
|---|---|
| HouseSigma | Free — Ontario sold prices |
| Zolo | Free — sold prices in many provinces |
| Realtor.ca | Limited sold data |
| Your city’s property assessment website | Some publish recent sales |
| Land registry / title search | Paid — $10–$30 per search |
| A REALTOR (or past agent) | Can pull sold MLS data |
Step 3 — Document property condition
If your property has issues that reduce market value, document them:
- Dated photos of structural problems, water damage, needed repairs.
- Inspection reports from a licensed home inspector.
- Contractor quotes for required repairs.
- Environmental reports (soil contamination, radon, UFFI).
Step 4 — Consider professional help
| Professional | Cost | When to use |
|---|---|---|
| Property tax consultant | $500–$2,500 (or contingency: 30–50% of first-year savings) | Assessments over $50K above market |
| Appraisal | $300–$500 | Strong evidence that’s hard to dismiss |
| Real estate lawyer | $200–$500/hour | Complex appeals or tribunal hearings |
Contingency providers only charge if they win a reduction — no savings, no fee. This is a good option for larger discrepancies.
What to expect at a hearing
Assessment Review Board / Panel hearing
| Element | What happens |
|---|---|
| Format | Semi-formal — you present, the assessor presents, panel asks questions |
| Length | 30–90 minutes typically |
| Who attends | You (or your representative) + the assessment body’s representative |
| Your presentation | State your case, present comparable sales, point out errors, show condition evidence |
| Cross-examination | The assessor may question your evidence; you can question theirs |
| Decision | Panel issues a written decision (sometimes immediately, sometimes in 2–4 weeks) |
Tips for a successful hearing
- Be prepared, not emotional. Stick to data — panels decide on evidence, not sympathy.
- Lead with factual errors — these are undeniable and often resolve the case immediately.
- Organize comparable sales in a clear table: address, sale date, sale price, and key features compared to your property.
- Bring extra copies of all evidence for the panel and the assessor.
- Know the assessment date — comparables must be relevant to that valuation date, not today’s market.
- Be realistic — asking for a 30% reduction when the evidence supports 8% undermines your credibility.
After a successful appeal
- Your assessed value is reduced — this flows through to a lower property tax bill.
- In some provinces, the reduction applies retroactively to the current tax year, resulting in a refund or credit.
- The new value stands until the next assessment cycle, unless the assessment body initiates a new assessment.
- Significant renovations or additions may trigger a supplementary assessment that increases your value mid-cycle.