How can an estate reduce or avoid paying Ontario's estate administration tax?

Several planning tools can legitimately reduce the value subject to Ontario's estate administration tax, though none should be adopted without understanding the trade-offs.

The most common is keeping assets outside the estate altogether: property held in joint tenancy with right of survivorship passes directly to the survivor, and RRSPs, RRIFs, TFSAs, and life insurance with a named beneficiary pass by designation rather than through the will. None of these are included in the taxable estate value.

For larger or business estates, a "multiple wills" structure is widely used: one will covers assets that require probate, such as real estate and most bank accounts, and a second, separate will covers assets that do not, most commonly private company shares and personal property, so the tax is calculated only on the assets that actually needed the probate certificate to transfer.

These strategies carry real trade-offs. Adding a child to title as a joint owner to avoid the tax can expose the property to that child's creditors or a marriage breakdown, and can trigger capital gains consequences the will would not have. A multiple wills structure must be drafted correctly, or it risks failing entirely.

Because these strategies interact with tax, family law, and creditor exposure, plan them with a lawyer rather than retrofitting them after the fact.