CostOne household income stops — a job loss, an illness, anything — and the mortgage, property tax, and everything else tied to the home keeps coming due regardless.
What usually happens without a real plan
A general rule of thumb is that an emergency fund covering 3 to 6 months of full housing costs — not just the mortgage payment, but property tax, insurance, and condo fees if applicable — gives most households a real buffer to handle a job loss or income interruption without an immediate crisis. Many households, though, either have no dedicated reserve at all or have significantly underestimated what their full monthly housing cost actually adds up to when every category is included, not just the headline mortgage number.
Sizing a realistic reserve
$2,900/mo total housing cost (mortgage + tax + insurance)
| 3-month reserve | $8,700 |
| 6-month reserve | $17,400 |
Use your own full monthly total, calculated on the mortgage payment calculator, rather than the mortgage payment alone, since the smaller line items add up to a meaningful share of the real number.
Building toward a real number
- Start with your actual full monthly housing cost, not just principal and interest.
- Consider your household's specific income stability — a two-income household where both jobs are relatively stable needs less of a buffer than a single-income household or one with more variable income.
- Check what income protection you already have — employer disability coverage, EI eligibility, or a personal disability policy all reduce how large a self-funded reserve needs to be.
- Build it gradually rather than treating it as a precondition to buying — a partial reserve is still meaningfully better than none, and it's reasonable to build it up over the first couple of years of ownership if it isn't fully in place at closing.
Who to ask
A financial advisor can help size an emergency fund against your household's specific income stability and existing insurance coverage, rather than relying only on a generic rule of thumb. If a serious illness or disability is the scenario you're most concerned about, ask specifically about disability insurance alongside general savings, since it addresses a different and often longer-duration risk than a standard emergency fund alone.