A train does not decide where to go.

It follows the rails it is on, mile after mile, for as long as they run.

When the train changes direction, the change happens somewhere ahead of it. A railroad switch moves the rails. The wheels follow. The train can’t do that part from the inside.

Someone has to throw the switch.

I keep coming back to that picture because of three answers readers sent me this year.

I periodically ask readers what they’re trying to figure out for themselves, at least once when they join and again later in a survey. Some of them tell me. A few wrote something I haven’t stopped thinking about.

They sounded like people who had done the saving part well.

Now they were trying to figure out how to use what they saved.

For most of a working life, saving runs on a schedule. A slice of every paycheck goes into a retirement account before you see it. A transfer leaves on the first of the month. You set it up years ago. You adjust it now and then, when a raise comes or a goal changes. In between, it runs on its own.

Most paydays, you don’t decide to save.

It just happens.

Payday after payday.

That’s a big part of why it worked. If you had to decide to save every payday, something else would usually win. The roof. The car. The dentist. The tuition bill.

Saving on a schedule doesn’t ask.

The other direction, spending what you had saved, works differently.

It has no schedule at all. Nothing moves on its own. Every withdrawal, every trip, every larger purchase is a decision you make on purpose, in the moment, with the balance right in front of you.

So the saving was automatic, and the spending is manual.

For decades, the money moved one way without asking you.

Now it’s supposed to move the other way, and it waits for your permission every single time.

I suspect this is where a lot of people get stuck.

For many of them, the math may be fine.

What’s missing is the switch.

One reader, semi-retired, described being “adept at saving and investing, but not so adept at spending for personal growth and enjoyment.”

Then came the sentence that stayed with me:

“I’m learning how to prioritize myself and spend in ways for no better reason than it brings me joy.”

I read the word “learning” twice.

That’s a person standing at the switch, working on it.

Another reader asked, “Do I have enough investment to retire comfortably?”

In the next box, this reader wrote out the life: “I’d like to travel, work on a classic car, play more golf, fly fish, and continue to enjoy my life each day!”

The plans were already specific.

Travel. A classic car. Golf. Fly fishing. Daily life.

The question in front of those plans was whether the money would say yes.

A third reader wanted a way to think about “living the lifestyle we want and not taking our net worth to zero or leaving too much for the kids,” and added, “I know that’s a wide spread.”

It is a wide spread.

Somewhere inside it is the point where the money stops only growing and starts getting used.

Three readers is a small group. I wouldn’t call it a pattern by itself.

But a larger survey points in the same direction.

In June, Corebridge Financial released a survey done by Greenwald Research. It asked 2,210 adults aged 45 to 79, each with at least $100,000 to invest. Only 28% said they were comfortable with the idea of their savings going down to cover living costs in retirement.

And 38% of retirees said they had spent less than they wanted, to keep their nest egg the same size.

Two cautions matter here.

A floor of $100,000 is likely below most people reading this, so the survey describes a broader group. And Corebridge sells retirement income products, which is worth knowing when its survey finds that people struggle to spend.

Still, I suspect the discomfort is familiar.

An older study looked at what people actually did, rather than what they said.

The Employee Benefit Research Institute used the Health and Retirement Study and found that retirees with at least $500,000 just before retirement had spent down only 11.8% of it within the first 20 years. About a third of all retirees in the study had more assets at the end of that stretch than at the start.

That research came out in 2018, so the people in it retired a long time ago.

But the behavior is still worth sitting with.

In that study, people who saved well used very little of what they saved.

That doesn’t automatically mean they were wrong.

A slow spend-down doesn’t prove anyone is stuck.

Some of those retirees probably didn’t want more than they had. Some were likely holding money back for care later in life. Some may have wanted to leave money to children or grandchildren. Some may have felt secure precisely because they didn’t spend much.

The numbers can’t tell you which.

That distinction matters.

Because sometimes a no is good judgment.

I’ve had my own no.

About a year ago, I saw a very expensive bracelet that I really liked.

We had the money.

I didn’t think I needed another bracelet. I didn’t think the brand name made it worth the price. I liked it, looked at it, and skipped it.

Around the same time, I bought a bunch of things for my kids.

That felt like joy.

To me, the bracelet was a decision.

I was not depriving myself. I was not afraid to use the money. I simply did not want that bracelet enough at that price.

From the outside, my no and a stuck no, the kind where the money is there and you can’t let yourself use it, can look exactly the same.

The money stays in the account.

The purchase doesn’t happen.

Nothing moves.

But on the inside, they can be completely different.

One no says, “I looked at this and decided it is not worth it to me.”

The other says, “The money is there, the plan says I can, and I still cannot let myself.”

That’s the question I keep coming back to:

When I say no to something I can afford, is it because I don’t want it, or because I can’t let myself?

The first kind of no is a choice.

The second kind is a switch that never got thrown.

There are plenty of rules for how much someone living on savings can take out each year and still be okay. I’m not going to argue for one here.

Those rules are useful for one question:

Could I spend this and still be fine?

That’s a real question. A good planner can help answer it.

But there’s another question the rule can’t answer for you.

Will I actually let myself use the money?

Say the trip is priced. The rule says yes. The money for it is sitting in an account that has done its job for years.

You still book the cheaper flight.

Or you leave the tab with the flight open in the browser for a week and then close it.

The rule told you that you could.

It couldn’t make you.

I think that is what the first reader meant by “learning.” The math can be settled for years before the person is.

Saving got easier once it had a schedule.

I’ve wondered whether spending could work the same way for some people.

Something small and deliberate.

A planned permission.

A date on the calendar when the switch is thrown on purpose instead of waiting to feel ready.

I’m honestly not sure.

It might help.

It might also turn a no you chose into a yes you didn’t want. That’s the risk.

The goal is to know the difference between restraint and fear.

A train will keep running down the rails it is on for as long as they last. That’s what it was built to do.

For decades, on the saving side, that was exactly right.

The saving probably worked. You likely did it well, and for a long time.

What’s left is a smaller question, and only you can answer it.

The next time you say no to something you can afford, consider asking which kind of no it is.

Is it the bracelet kind, where you looked, liked it, and decided it wasn’t worth it to you?

Or is it the kind where the money is there, the plan is there, and you still can’t make yourself throw the switch?

Either answer is useful.

Only one of them is a choice.

If someone came to mind while you were reading this, send it to them. That’s how most people find this letter.

This is not financial advice. This material is for educational purposes only and not financial, legal, or investment advice. Private investments may be risky. Do your own research and consult licensed professionals before acting on anything specific to your situation.

Until Monday.

Alina

The Long Arithmetic Review

A few times a year I work with one reader on one decision. Ninety minutes to open it up, a written review, a call to close it out. Thinking rather than advice.

If a decision has been sitting on your desk for a while, write back and tell me what it is. If it is a fit I will say so. If not, I will say that too.