Immediate vs Deferred Income Annuities: When Should Your Income Start?

Two Ways to Turn Savings Into a Paycheck

At some point in retirement planning, the conversation shifts from "how do I grow my money?" to "how do I make my money last?" For most people, that pivot is uncomfortable — for 30 years the goal has been a bigger number, and now the goal becomes a steady one. That's the point where income annuities tend to enter the picture.

Income annuities do something no other financial product can guarantee: they convert a pile of savings into a monthly check that lasts as long as you do. It's the closest thing to a personal pension that exists today — and most people only have to assemble their own because their employer stopped offering one somewhere around 1995.

There are two main options for when that paycheck begins. A SPIA starts income right away. A DIA schedules it for later. Same general concept, different timing — and that timing has an outsized impact on how much income actually shows up.

How Each One Works

SPIA: Income Starts Now

A Single Premium Immediate Annuity is about as straightforward as financial products get. A lump sum — say $200,000 — goes to the insurance company. Within 30 days, a monthly check starts arriving. The check continues for the rest of your life (or for a period you choose).

The size of the payment depends on age at purchase, current interest rates, gender, and the payout option selected. Older buyers receive larger payments because the carrier expects to make fewer of them. Higher interest rates also produce larger payments.

Once payments begin, the amount is fixed. No inflation adjustments (unless a COLA rider is specifically added), no market fluctuations, no surprises. It's a fixed, guaranteed paycheck.

DIA: Income Starts Later

A Deferred Income Annuity works the same way but with a waiting period built in. A lump sum goes to the insurance company today, and payments start at a future date selected at purchase — perhaps 5, 10, or even 20 years out.

Why wait? Because the math rewards patience. During the deferral period, the insurance company invests the premium and also benefits from mortality credits — the actuarial reality that some policyholders won't survive to begin collecting, and their forfeited premiums help fund larger payments for those who do. It sounds a little grim, but it's exactly how pensions and Social Security work too.

The result is significantly higher monthly payments compared to a SPIA bought at the same age.

Side-by-Side Comparison

The Pricing Advantage of Waiting

This is where DIAs really demonstrate their value. A simple example shows what deferral can do.

Assume: 60-year-old, $200,000 premium, life with 20-year period certain:

• SPIA (income starts at 60): ~$1,050/month
• DIA (income starts at 65): ~$1,450/month
• DIA (income starts at 70): ~$2,050/month
• DIA (income starts at 75): ~$3,000/month

The pattern is striking. Deferring income from age 60 to age 70 nearly doubles the monthly payment. Deferring to 75 nearly triples it. The carrier can offer those higher payments for three reasons:

1. The premium grows during the deferral period. The insurance company earns investment income on the deposit before sending any payments out.
2. Mortality credits accumulate. Some DIA buyers won't survive to the income start date; their forfeited premiums help fund larger payments for those who do.
3. Fewer expected payments. Starting income at 75 instead of 60 means the carrier expects 10–15 fewer years of payments overall.

The Flexibility Trade-Off

Here's the part that gives people pause with both products: once purchased, you're committed. The lump sum is gone. There's no calling the insurance company in three years and asking for it back.

SPIAs are almost always fully irrevocable once payments begin. You traded the lump sum for the paycheck, and the lump sum is now part of the insurance company's general account. With a "life only" payout and an early death, the carrier keeps the remaining balance. (For that reason, a period certain or cash refund option is usually worth considering.)

DIAs are slightly more flexible during the deferral window. Some newer DIA contracts include a return-of-premium feature — if circumstances change and the money is needed before income starts, the premium can be returned (though any growth is forfeited). Some also allow the income start date to be adjusted within a window. Once income payments actually begin, however, a DIA becomes just as irrevocable as a SPIA.

Who Should Choose a SPIA?

A SPIA generally fits if you:

• Are already retired and need income now — within the next 30 days
• Want to create a pension-like paycheck immediately to cover essential expenses
• Are between 65 and 80 — old enough to access attractive payout rates
• Have already worked out your retirement income plan and know exactly how much monthly income is needed
• Are comfortable with the irrevocable commitment because there are other liquid assets in place

Who Should Choose a DIA?

A DIA generally fits if you:

• Are 50–65 and planning ahead for future retirement income
• Want to lock in future income at today's rates and today's pricing
• Are specifically concerned about longevity risk — outliving savings in your 80s and 90s
• Want the maximum possible monthly payment for each invested dollar
• Don't need access to the money during the deferral period and have other resources for that window

The Longevity Insurance Approach

One of the more strategic uses of a DIA is as "longevity insurance." Instead of deferring 5–10 years, some buyers purchase a DIA at 60 with income starting at 80 or 85. Monthly payments at those starting ages can be enormous — partly because relatively few buyers survive to claim them, and partly because the money has decades to compound.

That structure means other savings only need to last until 80 or 85, with the knowledge that a substantial guaranteed income stream kicks in if you live longer. It's an efficient way to hedge against a very long life without committing a huge sum upfront.

A related product, the Qualified Longevity Annuity Contract (QLAC), does this same thing inside an IRA. Worth exploring if this approach is appealing.

A Framework for the Decision

Two questions usually settle it:

1. When do I need the income? If the answer is "now" or "within the next year," a SPIA is the right tool. There's nothing to agonize over — the SPIA delivers income immediately.

If the answer is "in 5, 10, or 15 years," a DIA is almost certainly the better choice. The pricing advantage of deferral is significant enough that it shouldn't be ignored.

2. How much of my savings am I comfortable making irrevocable? Income annuities work best as a part of a retirement plan — not the entire thing. A common approach: use an income annuity to cover essential monthly expenses (housing, food, healthcare, utilities), and keep the rest of the money in flexible accounts for everything else.

If essential expenses come to $4,000/month, Social Security covers $2,500, and the remaining gap is $1,500, that's the amount to target with an annuity. Over-annuitizing is rarely the right move.

The Bottom Line

SPIAs and DIAs are two solutions to the same problem: turning savings into guaranteed income. The SPIA handles right now. The DIA handles later — and rewards patience with significantly higher payments.

Neither is "better" in the abstract. The right choice depends entirely on timeline. For someone in their 50s or early 60s who knows they'll need more income in retirement, a DIA bought today can be one of the more impactful financial moves available. For someone already retired with the clock ticking, a SPIA delivers from day one.