Participating vs non-participating: what's the real difference?

In a participating plan, yes — you get a base guaranteed amount plus a share of the insurer's declared profits, called bonuses, added on top. In a non-participating plan, no — you get a fixed number stated in the policy document, full stop, regardless of how the insurer's broader investment book performs.

What this means practically

• Participating plans have upside potential (and a small amount of downside risk on the "non-guaranteed" bonus portion) tied to the insurer's performance and how generously it chooses to distribute profits.
• Non-par plans are easier to evaluate on paper — what the brochure says is closer to what you'll get, because there's no bonus variable in the middle.
• Once a reversionary bonus is declared and added to a participating policy, it typically can't be taken away, even if a future year's bonus is lower or zero.
• A terminal bonus (paid only at maturity or death, on top of accumulated reversionary bonuses) is entirely at the insurer's discretion and isn't guaranteed until actually paid.

Neither structure is inherently better — a non-par guaranteed income plan and a participating endowment are solving the same broad savings job with different amounts of certainty. The trade-off is: more certainty (non-par) versus more potential upside tied to the insurer's performance (participating).