March 22, 2021 – It’s tax season in the U.S. right now! Even though that deadline has just been pushed back to May 17, taxes are on everybody’s mind, so this is a good time to write about the topic in the context of the Safe Withdrawal Rate Series. Until now, I haven’t written all that much about taxes and the main reasons are:
- While I do have a combined 6 letters behind my name (Ph.D. & CFA), I’m missing the three letters “CPA” to write anything truly authoritative about the topic.
- My primary focus is on getting the Safe Withdrawal Rate right. It’s the first issue everyone should worry about. I did some case studies years ago for early retirees and some of them could actually raise their SWR to more than 5% if they do their accounting for future cash flows right. That’s 25% better than the naïve 4% Rule. If you start with a tax plan that’s already somewhat OK and close to optimal, I doubt that you can squeeze out another 25% in after-tax withdrawals through a truly “optimal” tax plan. Hence my approach: get your SWR right and factor in the tax optimization plan afterward to make sure you squeeze maybe another percent or two in the after-tax numbers! (And likewise, if you have a 60-year horizon and not much in the way of supplemental cash flows and you’re looking at a 3.25%, maybe a 3.5% withdrawal rate, you’re not going to “tax-hack” yourself to a 4% withdrawal rate either!)
- Taxes are very personal and it’s difficult to give any generalized advice. As much as I would like to create a spreadsheet like the Google Sheet to simulate safe withdrawal rates (See Part 28 for the details) where you plug in your numbers and the sheet spits out a detailed plan, it’s not so trivial. Very likely, the tax analysis would have to be more custom-tailored! And just to be sure, my Google SWR simulation sheet isn’t trivial either! 🙂
But of course, even if you first do your SWR analysis in before-tax terms, you will want to know how much of a haircut you need to apply to calculate your after-tax retirement budget. Some retirees can indeed make over $110,000 a year and don’t owe any federal tax as I showed in my post in 2019 (“How much can we earn in retirement without paying federal income taxes?“). And in the same post, I showed that to get to a 5% average tax you’ll likely need a $150k annual retirement budget. So, it’s a fair assumption that most of us in the FIRE community will likely get away paying less than 5% of our retirement budget in federal taxes. Add another 0-5% or so for most state tax formulas, and you will likely stay below 10% effective/average tax rate.
But I get the message: because we can’t completely ignore taxes, I wrote today’s post to talk about the general ideas and principles in retirement tax planning. In at least one additional future post (maybe two, maybe three) I will also do a few case studies to see the general principles in action. At that point, I will also include the Excel Sheet I use to perform the tax planning analysis because a lot of readers asked for that tool when I published the Case Studies 3+ years ago! And as I warned before: it’s not as simple as just putting your parameters and Excel automatically spits out your plan. It involves a bit more human input and analysis, stay tuned!
But before we even get to the messy parts, let’s take a look at some general principles…
Continue reading “Principles of Retirement Tax-Planning – SWR Series Part 44”