The CMHC FTHBI 8% Cap Policy: Rules & Retroactivity
When the First-Time Home Buyer Incentive (FTHBI) launched in September 2019, it was designed to help buyers lower their monthly mortgage payments. However, in rapidly appreciating markets like Surrey, Langley, and Abbotsford, the shared-equity structure meant the government captured a significant portion of the equity growth. To resolve this, the CMHC implemented a major policy shift on June 1, 2022, introducing an 8% per annum limit on both shared gains and losses.
Why the 8% cap was introduced
Under the original 2019 program rules, if you received a 5% incentive on a $400,000 purchase ($20,000) and sold the property five years later for $650,000, you owed the government 5% of the sale price: $32,500. This represented a 62.5% return for the government, funded entirely by the buyer's home appreciation.
Critics pointed out that while the government contributed a small portion toward the down payment, it reaped a massive reward from the buyer's localized market growth, leaving first-time buyers with less equity to roll into their next home.
The June 1, 2022 update established a cap to protect homeowners. Under the current rules, the government's maximum shared return is limited to 8% simple interest per year on the incentive amount. In the scenario above, the maximum gain the government can claim is capped at 40% of the incentive ($8,000), meaning the buyer repays $28,000 instead of $32,500, keeping $4,500 of their own hard-earned equity.
Simple interest vs. Compound interest
One of the most common points of confusion we see is how the 8% limit is calculated. Many buyers assume the 8% cap compounds annually (like a mortgage rate or investment return).
The cap uses simple interest, not compounding interest.
This means the 8% limit is calculated strictly on the original principal amount advanced, and that dollar cap remains fixed for every year you hold the loan. It does not grow exponentially.
The Math: Simple vs. Compound (On a $20,000 Incentive)
- Simple Interest (FTHBI Cap): Every year you hold the loan, the maximum gain cap increases by exactly $1,600 ($20,000 × 8%).
- Compounding Interest (Not Used): The first year would cap at $1,600, the second at $3,328 (compounding the first year's growth), and the fifth at $9,387.
| Years Held | Simple Interest Cap (Actual) | Compounded Cap (Not Used) | The Difference |
|---|---|---|---|
| Year 1 | $1,600 | $1,600 | $0 |
| Year 2 | $3,200 | $3,328 | +$128 |
| Year 3 | $4,800 | $5,194 | +$394 |
| Year 4 | $6,400 | $7,210 | +$810 |
| Year 5 | $8,000 | $9,387 | +$1,387 |
Because the program uses simple interest, the dollar cap grows linearly, protecting you from exponential payout inflation the longer you hold the mortgage.
The retroactivity rules
The Program Administrator structured the 8% cap policy with two different retroactivity rules: one for appreciation gains, and one for depreciation losses.
1. Appreciation Gains (Retroactive)
The 8% cap on appreciation gains applies retroactively to all FTHBI agreements signed since the program launched in September 2019. If you bought your home in 2020 and are repaying it today, the Program Administrator will apply the 8% per annum limit to your gains. You get the full benefit of the cap even though it was not part of your original contract.
2. Depreciation Losses (Non-Retroactive)
The 8% cap on depreciation losses is not retroactive. It only applies to shared-equity mortgage agreements signed on or after June 1, 2022.
- For agreements signed on or after June 1, 2022: If your home value declines, the government's shared loss is limited to 8% per year. You must repay at least the original incentive minus 8% simple interest per year (the minimum floor).
- For agreements signed before June 1, 2022: The government's shared loss is uncapped. If your home value crashes, you simply repay the standard percentage (5% or 10%) of the lower market value, even if the value loss exceeds 8% per year. In this specific scenario, the lack of retroactivity actually benefits older buyers, as they have no floor protecting the government's loss share.
We have provided detailed scenarios and mathematical models of both gains and losses under these rules on our FTHBI Repayment Calculations page.
Frequently Asked Questions
These are the common policy-related questions we hear from Fraser Valley homeowners regarding the 8% cap rules.
If my home has appreciated, is there any reason not to use the 8% cap?
The Program Administrator applies the cap automatically. Your repayment is always the lesser of the standard percentage-based market value or the capped calculation. If your home has appreciated, the cap will only ever help you or have no effect, it will never increase your payoff balance.
Does the 8% cap mean my mortgage balance is growing by 8% every year?
No. The FTHBI is not an interest-bearing loan. Your balance does not automatically grow. The 8% per annum is simply a maximum ceiling on what the government can collect if your home value has gone up. If your home value has not changed, your repayment balance remains identical to the amount you originally received.
What if I repay after exactly 3.5 years?
The Program Administrator calculates the elapsed time to the day. For 3.5 years, the cap is exactly 28% of the original incentive ($20,000 × 8% × 3.5 = $5,600).
Does the cap apply if I sell my home or only if I pay it off early?
The 8% cap applies to both scenarios. Whether you are selling your home (mandatory repayment) or completing a voluntary repayment while keeping the home, the Program Administrator uses the same formula.
Is the 8% cap policy legally binding?
Yes, the 8% cap policy was formally implemented by the CMHC and is registered under the operational guidelines of the Shared Equity Mortgage Program. It is legally binding on the Program Administrator.
What happens if the appraiser's value is lower than my contract price?
For home sales, the Program Administrator typically uses the contract price of an arm's-length transaction to determine the market value. Appraisals are generally required only for voluntary early repayments where no sale is occurring.
Does the 8% cap protect me if I refinance?
The cap applies to the payoff calculation, but refinancing itself does not change the math. If you refinance your first mortgage and increase the principal, you must repay the FTHBI loan in full, and the payoff amount will be calculated using the 8% cap rules.
Are there any fees to calculate the 8% cap?
No, the Program Administrator does not charge fees to calculate your capped payoff amount. However, you will be responsible for standard legal and conveyancing fees to discharge the second mortgage from your title.
Does the cap apply to the provincial property transfer tax?
No, the 8% FTHBI cap is a federal program policy and does not affect the calculation of British Columbia's Property Transfer Tax (PTT) or any provincial tax exemptions.
Can I request a copy of my original FTHBI loan terms?
Yes, you can request your original agreement from the lawyer or notary who handled your purchase closing, or by contacting the Program Administrator directly with your mortgage account number.
Sources & Reference Documents
- CMHC FTHBI Repayment Hub Integrated program guidelines, calculations, and operational policies.
Frequently asked questions
The questions we hear most often from first-time buyers in actual FRIVE meetings.
- What was the purpose of the 8% cap on FTHBI repayments?
- The federal government introduced the 8% cap on June 1, 2022, to address criticisms that the program penalised buyers in rapidly rising markets. By capping the government's shared equity gain at 8% simple interest per annum, it helps owners retain more of their home's appreciation.
- Is the 8% FTHBI repayment cap retroactive for appreciation?
- Yes, the 8% cap on appreciation gains is retroactive. It applies to all repayment transactions closed since the program's inception in September 2019, ensuring early participants benefit from the cap when selling or paying off their loan.
Where these numbers come from
- 1First-Time Home Buyer Incentive Canada Mortgage and Housing Corporation. Accessed May 28, 2026.
- 2First-Time Home Buyer Incentive Repayment Factsheet Canada Mortgage and Housing Corporation. Accessed May 28, 2026.
Tax thresholds, program limits, and rates change. We update this page when we notice a change. Before signing anything, verify the current figure with the linked source, or ask your mortgage broker.
