Doctors Can’t Spend More Than Half Their Income

By Jimmy Turner, MD
The Physician Philosopher

Editor: People love rules of thumb.  It is one of the best ways to avoid analysis paralysis and move forward, because you have a guide that helps you do just that.  In this post, WCI discusses a helpful baseline rule of thumb based on your income to answer the question, how much of my income can I spend?

It turns out the answer isn’t complicated, but it is helpful.  Tag along to see why you should only spend half your income.  This post was originally written by and published on the White Coat Investor

I realized something recently. I’m not sure why it took so long. It seems simple and obvious now. You’ve probably already realized this, but if not, here’s a nugget of truth:

You Can’t Spend More Than Half Your Income

I’m not talking about net income. Physician on FIRE challenges those seeking FIRE to “live on half.” That’s not what we’re talking about here. I’m talking about the answer to this question:

How much of my gross income can I spend each year and expect to be able to sustain my standard of living throughout my life?

It turns out the answer to that, at least as a general rule of thumb for a high income professional, is “about half.” Why is that you ask? Because the other half has to go to taxes and savings. It has to. The taxes aren’t optional and they’re going to be fairly high for most of us during our peak earnings years. The retirement savings is optional, I suppose, but not if you wish to actually avoid eating Alpo.

Take a look at the math.

Taxes Eat Up Lots of Your Gross Income

First, let’s think about taxes for a bit. When I was making the average physician income, my effective tax rate was in the teens. But it turns out I was a fairly unusual case. Most docs pay an effective rate in the 20-30% range, some a little more, some a little less. So if you subtract out 30% of your gross income for taxes, that leaves you 70%.

Safe Savings Rate

Next, let’s look at what kind of a savings rate is needed to provide a reasonable retirement. Long term readers know I generally recommend docs use a 20% saving rate. Will they be okay with 15%? Probably. But 5-10% just isn’t going to cut it. Let’s demonstrate why it needs to be higher than that with a simple future value calculation.

Let’s take a doc making $200K who starts saving for retirement at 35 and hopes to retire at 60. She earns 5% real on her investments and saves 20% a year? How much will she have at age 60 and how much of her pre-retirement income will that replace? Plug this into your friendly spreadsheet:

=FV(5%,25,-40000) = $1,909,084

Spending more than half your income is riskier than rappelling

Multiply that by about 4% and it gives you an income from your portfolio of about $76K real per year. That’s about 38% of your pre-retirement income, which is smack dab in the middle of that 25-50% range that a typical doctor needs in addition to Social Security to maintain her standard of living in retirement, assuming the kids are launched and the house is paid off.

So subtract out another 20% from that 70% you had after taxes and that gets you to 50%. That’s what you can spend if you hope to avoid ever having to decrease your standard of living. Said another way, if you spend more than that regularly, you’re going to have a lower standard of living in retirement.

Higher Earners Have It Worse

The percentage gets even worse if you make and spend more than the typical doctor. That’s because the tax code is progressive. It is progressive during your earnings year and it is still progressive in your retirement years. In addition, the more you make and spend the lower your relative contribution from Social Security will be.

Consider another example:

How much peak earnings income does it take to create a sustainable $400K a year after-tax spending level? A lot more than you might imagine. Let’s start at the end and work back to the beginning.

In order to spend $400K a year in retirement, you need about 25 times that as a nest egg, or $10 Million. At that sort of spending level, Social Security can almost be ignored. But wait, you need $400K in after-tax money. At that sort of tax bracket, you’re probably looking at an effective tax rate of at least 24%, perhaps 32% even in retirement. So we’re really talking about perhaps a $13 Million nest egg.

How much do you need to put away each year at 5% real to have $13 Million after a 25-year career?

=PMT(5%,25,0,13000000) = $272,381.

So add that on to your $400K. Now we’re up to $672K you need to earn in order to sustain a $400K spending level. But wait, we haven’t considered the taxes as you’re earning the money. At that sort of income level, perhaps 35% of what you earn is going to be going to the tax man. That means you need a gross income of $1.04M during your career to sustain a $400K spending level throughout your life. That’s 38%, significantly less than the 50% for an “average doc.”

Sobering isn’t it. I’ve written before that you can never grow all the way into your income. If you’re smart, you’ll never grow into more than half of it and you’ll begin your career living like a resident on much less than that. And we’re not even talking about retiring early here. This is just regular old retirement.

What do you think? Did you imagine that you would only be able to spend 40-50% of your gross income when you applied to med school? How much of your gross income do you spend after taxes and savings? Do you think that is too little or too much? Comment below!



  1. Rikki Racela

    Nope, didn’t have the foresight to realize I would only be spending half my income as a doc when I was applying. Luckily didn’t go into medicine for the money! But to a certain expect I did expect a little bit of a bawler lifestyle, not hip-hop star but like typical American image of a doctor and was disappointed when I bought the big house living in NJ and getting duped into buying whole life insurance that I was suffering financially. Never thought that was possible as a doc! Luckily now me and the wife are at the 50% spending of our gross income, and actually happier than when we were hemorrhaging cash. I don’t think it’s the actual amount that you spend, but in our case actually having a financial plan to meet our goals for us now, our kids and our retirement matters.

  2. T

    Totally make sense.
    A 20 yo thinking about his future can become a barista for 50k annual salary, or a paper pusher for 100k annual salary, or a software engineer for 200k, or a doctor for 400k salary. There’s nothing intrinsically different about the person’s value. The only difference is the lifestyle he wants to lead. He can spend 400k, 200k, 100k, or 50k a year… and that’s entirely up to him. No one can force him to shop at a specific supermarket or drive a particular type or car. The earlier a child can recognize that, the better it’ll bode for his or her future.

  3. Kieran J Nicholson

    I realized early on that 1/3 went to taxes, that we should live on 1/3 and 1/3 was to be saved/invested. Not every year of course as there are years with big expenses e.g. a 20% house down payment. This allowed me to leave private practice in 2009 at age 50 and work recreationally. e.g. hospice medical director. Also a good idea to have the mortgage paid off when 1st kid goes to university although that may no longer be the case in an era of super low mortgage rates.

  4. Jordan

    Such an important concept to understand. If you don’t have a goal in terms of how much you need for retirement, you will never be able to figure out how to get there. And you will likely underestimate the amount you need!

    I was fortunate to learn this just before becoming an attending and create a financial plan that set me on the path to my goals. But I’ve still got a ways to go!



Submit a Comment

Your email address will not be published. Required fields are marked *

You might also be interested in…

Budgeting That You Won’t Hate: Backwards Budgeting

Budgeting That You Won’t Hate: Backwards Budgeting

Let’s be real. Most of us hate budgeting. I know that I do. That said, I am a big believer that unintentional plans lead to lots of people ending up broke. What if I told you that there is a way to budget that you won’t hate, and it will accomplish all of your goals automatically? Too good to be true? Read on to find out…

Tips for Moonlighting in Residency: Making Extra Cash

Tips for Moonlighting in Residency: Making Extra Cash

As a PGY-4 in my anesthesiology residency, I easily doubled my salary by moonlighting in residency. Many opportunities exist for moonlighting, and the pay usually ranges from $60/hour to $150/hour depending on the nature of the call.  Today, let's hammer out the...

Time is money, but money can’t buy time

Time is money, but money can’t buy time

Please, tell me I am not the only one who thinks like this?  My monetary mindset currently revolves around our biggest (current) financial goal: Paying off our student loans. I hope that some day I can truly learn that Time is Money and that money is a means to an end. It’s not an end in itself.

Are you ready to live a life you love?