A survivorship policy insures two people on one contract and pays nothing when the first one dies. The death benefit arrives at the second death. Carriers also call it second-to-die, and for a couple building a banking system it's a specialized tool rather than a starting point.
The pricing is the appeal. Because the carrier isn't paying until both insureds are gone, the odds of an early claim fall sharply and the premium reflects that. A survivorship policy can run meaningfully less than two individual policies carrying the same total death benefit, and sometimes less than a single individual policy on the healthier spouse. Underwriting is easier too. A spouse who'd be heavily rated or declined on their own can often get covered on a survivorship contract. The carrier is pricing joint mortality, and the healthy spouse carries most of it.
What it's built for is a bill that arrives at the second death. Estate tax is the classic one, because anything left to a spouse passes free of estate tax under the marital deduction and the tax lands when the survivor dies. A family holding land, a farm, or a business the heirs want to keep needs cash at exactly that moment, and a survivorship policy is designed to show up then. Special needs planning is the other common use, where a trust for an adult child gets funded once both parents are gone.
Now the part that matters if you're building a line of credit against cash value. A survivorship policy is a poor fit for most of what this site is about, for three reasons.
Nothing happens at the first death. The surviving spouse receives no death benefit, at the exact moment half the household income disappeared. If the reason you're buying life insurance is income replacement, a survivorship contract does not do that job at all.
The cash value is usually an afterthought. Survivorship contracts are typically designed for death benefit efficiency, which means the smallest premium buying the largest guaranteed payout. That's the opposite of a design built for cash value, where you want a small death benefit and a large premium pushed right up against the tax limits. Base premium vs. paid-up additions covers the mix that actually builds usable cash value. A survivorship policy can be funded for cash value, and almost none of them are, and you'd have to ask for it by name.
The contract is tied to a marriage. Divorce doesn't dissolve the policy. It stays a joint contract with two insureds who no longer share a plan. Splitting it usually means surrendering it, or exchanging it for two individual contracts at current ages and current health. Some contracts carry a split option rider that allows that exchange with no new underwriting. It usually requires a triggering event, like a divorce or a change in the estate tax law. If you're looking at one, ask whether that rider is available and what triggers it.
So the case for a survivorship policy is narrow and it's real. A couple with an estate tax problem. A business or a piece of property the heirs intend to keep. A dependent who'll need money after both parents are gone. It gets stronger when one spouse's health makes individual coverage expensive. Outside of that, two individual policies do more. Each one pays when that person dies. Each one builds cash value you can borrow against while you're both still here. Whether to own one policy or several is a question I answered on camera, and the reasoning runs straight into a couple choosing between one joint contract and two separate ones. The case for a policy on both spouses lays out how that pairing usually gets built.
Whatever proposal you're looking at, the cash value columns on it are a projection and not a promise, and the same is true of any survivorship illustration you'll ever be handed. I'm a licensed insurance broker and not a CPA or an attorney, and the estate tax half of this belongs to both of them.
If somebody has put a survivorship proposal in front of you, ask three questions before anything else. What happens to our income if one of us dies first. What does the cash value column look like at years five, ten, and twenty. And what does this contract say if we divorce.