By what age do I have to convert my RRSP to a RRIF?

The Income Tax Act sets a mandatory age by which an RRSP must be converted, or "matured," into a retirement income vehicle, most commonly a RRIF, and this isn't an optional planning choice you can defer indefinitely. Because this mandatory age is a specific figure set out in the Act, it's worth confirming the current age directly rather than relying on an older source, since it's exactly the kind of detail that's easy to misremember or find outdated information about.

What matters more than the specific number is understanding that this deadline is firm and has serious consequences if missed: failing to convert your RRSP by the mandatory age can cause the plan to lose its registered status, generally resulting in the entire RRSP value becoming taxable income all at once, rather than being spread out the way a normal RRIF withdrawal schedule would allow. That's covered in more detail in a related question, but it's the reason this isn't a deadline to treat casually. As you approach the age in question, checking with your financial institution about the exact current deadline and beginning to plan your conversion well ahead of it is a sensible, low-cost step.