Buy Term and Invest the Difference
Also called BTID, buy term invest the rest, buy term and invest the rest
The classic counter-strategy to permanent insurance: buy cheap term life for protection and invest the premium savings separately, rather than in the policy.
Buy term and invest the difference (BTID) is the classic counter to being sold permanent insurance. Instead of paying a high premium for whole life or universal life that bundles protection with a savings account, you split the two jobs: buy cheap term life for the death benefit, and invest the money you saved on premiums in your own account — typically low-cost index funds.
The case for it is straightforward, and mostly correct: term coverage can cost a tenth of permanent coverage for the same death benefit, and a separate investment account tends to out-earn a policy’s cash value over decades, because it isn’t drained by cost of insurance, commissions, and fees. For most families protecting their income during their working years, BTID does more for less. Our Dossier 041 lays out a term-ladder version that matches coverage to the years you actually need it.
Being honest cuts both ways, though — this is a strategy, not a magic trick, and it has two genuine catches:
- You have to actually invest the difference. If the “difference” gets spent instead of invested, you end up with just cheap term and no savings — worse than if you’d been forced to save. Permanent insurance’s one real virtue is that it compels the saving; BTID leaves it to your discipline.
- Term expires. If you still need coverage in old age and haven’t accumulated enough to self-insure, you can be left uninsured or facing steep late-life premiums. The plan assumes you’ll be “self-insured” — mortgage paid, kids grown, nest egg built — by the time the term ends.
The agent’s stock rebuttal is “term expires and you get nothing back.” That’s technically true and mostly beside the point — the goal is to not need insurance by then. When you hear it (often alongside a return of premium or infinite banking pitch), do the arithmetic yourself: compare the term premium plus invested difference against the permanent policy’s guaranteed cash value, over the same years. For most buyers, the split wins — as long as you hold up your end and invest.
It's the argument permanent-insurance sellers most want to talk you out of, because for most families the math favors it. But it's not automatic — it only works if you actually invest the difference and keep the discipline for decades.
A 35-year-old is quoted $300/month for whole life or $30/month for 20-year term with the same death benefit. Buy term, invest the $270 monthly difference in low-cost index funds, and over 20 years the invested account can far exceed the whole life cash value — while the family stays fully protected the whole time.
Agents dismissing this with 'term expires and you get nothing' — technically true, but usually the point (you self-insure by then). The honest catch is on your side: BTID only wins if you actually invest the difference and don't spend it. See the term-ladder approach in Dossier 041.