Why the 70% Rule Doesn't Work on Canadian Condo Flips

The rule every flipping book teaches was written for a different country

The 70% rule is the most quoted formula in house flipping:

Maximum offer = (After Repair Value × 0.70) − repair costs

On a condo you expect to sell at $676,500 with $23,000 of renovation, that gives a maximum offer of about $450,550. Inder bought at $535,000 — well over the limit — and it worked out.

That is not because he got lucky. It is because the rule is calibrated to American single-family houses and American tax treatment, and three of its assumptions do not survive the border.

What the 30% is supposed to cover

The 30% haircut is a bundled allowance for selling costs, holding costs, financing and profit. It is a rule of thumb that hides its own arithmetic, which is fine until the underlying costs change.

In Canada, they change in three specific ways.

Problem 1: it has no idea the flipping taxes exist

The rule predates both of them and was never designed to carry them.

The BC home flipping tax takes up to 20% of the profit on anything sold inside 730 days. The federal Residential Property Flipping Rule deems profit on anything sold inside 365 days to be business income — 100% included in taxable income rather than the 50% you would get on a capital gain, with no principal residence exemption.

Neither is in the 30%. They land on the profit that the 30% was supposed to protect.

Worse, the BC tax is calculated on proceeds minus purchase minus improvements. Your commission, legal fees and carrying costs are not deducted from that base. The province taxes a number larger than your actual profit.

Problem 2: property transfer tax is a Canadian line the rule never allowed for

B.C. charges property transfer tax on purchase — 1% up to $200,000, 2% from there to $2,000,000, 3% above that. On a $535,000 condo that is $8,700 on the buy side.

It is a fixed, knowable, unavoidable cost that arrives before you have done anything to the property. The 70% rule has no slot for it.

Problem 3: condos are not the houses the rule was built for

The 70% rule assumes you control the asset. In a strata you control the inside of one box.

• Renovation scope is limited — common property, plumbing stacks, windows and exteriors are usually not yours to touch
• Strata approval and restricted work hours stretch timelines, and timeline is money twice over in BC because the flipping tax rate is a function of days held
• A special levy approved while you hold generally becomes your bill
• Strata fees accrue monthly regardless of occupancy

Meanwhile the upside is narrower. You cannot add square footage or a suite. Your value-add is finish quality and layout inside a fixed envelope, which is exactly why Inder's ten-day, $23,000 renovation produced the result it did — condo flips reward speed and precision, not scope.

What to use instead

Stop working backwards from a percentage. Work backwards from the number you actually want to keep.

1. Start with a realistic ARV from genuine comparables, not the optimistic one.
2. Subtract every real cost: purchase, property transfer tax, legal, financing, renovation with a contingency, holding costs for the timeline you will actually take, commission and selling costs.
3. Subtract the BC home flipping tax at the rate for your planned day count — remembering its base is bigger than your profit.
4. Subtract federal tax on the remainder as business income at your marginal rate.
5. Is what's left worth the risk and the months? If yes, that is your deal. If not, no percentage rule will rescue it.

It is slower than multiplying by 0.70. It is also the only version that tells you the truth.

Why Inder's deal passes the real test and fails the rule

At $535,000 the purchase is $84,450 above what the 70% rule permits. Under the rule it is not a deal.

But the renovation was $23,000 and took ten days. The hold was about two months. The spread was $118,500 before costs. Low renovation risk, minimal holding cost, fast exit — the very profile the 30% buffer is over-provisioned for.

The rule rejected a deal that worked, because it was pricing renovation and timeline risk that a fast cosmetic condo flip does not carry. Applied strictly in a Canadian condo market, it will screen out most of the deals actually worth doing while doing nothing about the taxes that decide whether the rest are profitable.

A formula that both rejects good deals and misses the real costs is not a safety margin. It is a habit.

For the full cost stack on a real Vancouver deal, see what a Vancouver condo flip actually costs, line by line. For the tax rules themselves, see the two flipping taxes.

Sources

• Government of British Columbia — Property transfer tax and BC home flipping tax
• Canada Revenue Agency — Residential Property Flipping Rule

General information as at August 2026, not tax or financial advice. Red Academy is not a tax advisor and makes no income guarantees. Deal figures are one student's reported numbers, not a projection of your result.