Retirement Education

Protecting Your Retirement · 7 min read

Income That Lasts vs. Purchasing Power That Lasts

Having income for life is important. But over a long retirement, another question matters too: what will that income still be able to buy?

One of the biggest goals in retirement planning is making sure your income can support you for as long as you need it.

But there's another part of that question that's easy to overlook.

An income amount can stay exactly the same while the cost of living around it changes.

That means there are really two different challenges:

Will the income continue?

and

Will that income continue to support the lifestyle you planned for?

Understanding the difference is an important part of building a retirement-income picture.

The number can stay the same while its buying power changes

Imagine you retire with $5,000 per month available to support your lifestyle.

At the beginning of retirement, that amount may comfortably cover the expenses you've planned for.

Years later, you could still be receiving the same $5,000.

But groceries may cost more.

Utilities may cost more.

Insurance may cost more.

Travel, home repairs and everyday services may cost more.

The income didn't necessarily go down.

Its purchasing power did.

That's the basic challenge inflation creates for retirees.

Retirement can give small changes a long time to matter

Inflation isn't only about a sudden jump in prices.

Over a retirement that could last 20 or 30 years, even gradual increases in expenses can accumulate.

Consider a simplified example.

If a household needs $5,000 per month today, and its overall expenses increased by an average of 3% per year, maintaining approximately the same purchasing power would require roughly:

These aren't predictions of what inflation will actually be.

They're simply an illustration of why time matters.

A retirement-income plan isn't funding only the first year of retirement.

It may need to support decades of changing expenses.

Approximate Monthly Amount to Maintain Purchasing Power

$5,000Today
$6,72010 years
$9,03020 years
$12,14030 years

Simplified hypothetical illustration assuming a 3% average annual increase in expenses. Not a prediction of future inflation.

Not every expense will increase at the same rate

It's tempting to think about inflation as though every household expense simply rises by the same percentage each year.

Real life isn't that orderly.

Some expenses may rise quickly.

Others may remain relatively stable.

Some could even disappear.

Your mortgage might eventually be paid off.

Travel spending might be higher during the early years of retirement and lower later.

Healthcare expenses could move in the opposite direction.

Property taxes, insurance, food, utilities and other costs can each behave differently.

So the goal isn't to perfectly forecast every future expense.

It's to recognize that your retirement budget probably won't remain frozen in time.

Some retirement income can change. Some may not.

Your retirement paycheck may eventually come from several places.

Social Security benefits, pensions, retirement accounts, cash savings, annuities and other resources can all play different roles.

And those income sources don't necessarily respond to inflation in the same way.

Some income may have the potential to increase.

Some may remain level.

Some may depend on account performance or withdrawals.

Some may be designed primarily to provide predictability rather than increasing purchasing power.

That's why simply asking:

“How much retirement income will I have?”

doesn't tell the entire story.

Another useful question is:

“Which parts of my income might change over time, and which parts might stay the same?”

Dependability and purchasing power solve different problems

This distinction is especially important.

Income that is designed to continue can help address one retirement concern:

What happens if I live a very long time?

Income with the ability to increase can help address another:

What happens if my expenses become more expensive over time?

Those are not identical problems.

And one source of retirement income doesn't necessarily need to solve both of them.

This connects to a principle we introduced in our first lesson:

Not every retirement dollar needs the same job.

Some resources may be positioned to help create dependable income.

Others may remain available for liquidity.

Others may have the opportunity for future growth.

The objective isn't to force every dollar to do everything.

It's to understand which jobs your retirement resources may need to perform.

The retirement paycheck may need room to change

Think about the retirement paycheck you expect to need when you first stop working.

Now imagine yourself 10, 20 or perhaps 30 years later.

Your life may look different.

Your spending may look different.

And the amount required to support that life may look different too.

That doesn't mean you need to know today exactly what your income should be in the year 2056.

You don't.

It means your retirement-income picture should acknowledge that tomorrow's paycheck may not need to look exactly like today's.

A useful way to think about the problem

Instead of trying to predict inflation perfectly, start with a few practical questions:

  • Which of our retirement expenses are likely to continue for life?
  • Which expenses might increase over time?
  • Which expenses might eventually decrease or disappear?
  • Which income sources are expected to remain level?
  • Which income sources may have the ability to increase?
  • What resources could provide flexibility if our expenses become higher than expected?
  • Would our retirement-income picture still work after many years of changing costs?

You don't need precise answers to every question today.

The purpose is to make sure purchasing power is part of the conversation.

Inflation can affect more than lifestyle

When people hear “inflation,” they often think about groceries, gasoline or restaurant prices.

But rising costs can affect more consequential parts of retirement too.

Healthcare.

Insurance.

Home maintenance.

Property-related expenses.

Long-term care.

Even modest changes in several categories can affect how much income a household ultimately needs.

That is why purchasing power isn't simply about whether you'll still be able to take the same vacation.

It's about whether the income supporting your retirement remains aligned with the expenses that matter to you.

Bringing It Together

Having income that lasts and having purchasing power that lasts are related—but they aren't the same thing.

A dependable stream of income can provide valuable certainty.

But if that income remains level while expenses rise, its ability to support your lifestyle can gradually change.

That doesn't mean every retirement-income source needs to increase.

It means a retirement-income plan should recognize that different resources may have different jobs—and that some flexibility may be important over a retirement that could last decades.

The goal isn't to predict exactly what everything will cost in the future.

It's to build a retirement-income picture that doesn't assume the future will cost exactly what today does.

See Your Retirement Income Picture

Your retirement isn't just an account balance. See how your income, savings and retirement priorities fit together.