The W‑4 Breakdown: When Employees File and What Really Matters

When And How Do Employees Fill In The W-4 Form For Tax Withholdings?

Deadlines are creeping closer, but your tax withholding doesn’t have to feel like a black box. We break down a simple, reliable way to set up your W4, sanity-check your payroll, and avoid giving the IRS an interest-free loan. Whether you just started a new job, picked up a side gig, or went through a big life change like marriage or a new child, this conversation gives you a step-by-step path to get your numbers right and keep more predictable cash flow all year.

We start with timing and the key triggers for updating your W4, then show how to calculate your effective tax rate from last year’s 1040 and use a quick pay stub check to see if your current withholding is on track. You’ll learn why “simple first, adjust later” beats overcomplicating deductions, how to use the extra withholding line to fine-tune results, and why aiming for break-even is often the smartest goal. We also clear up common confusion by comparing W2, W4, and W9—what each form does, who uses it, and how mix-ups lead to under-withholding. For small business owners, we cover pitfalls to avoid, secure storage best practices, and why outsourcing payroll can prevent costly mistakes.

Expect practical examples, plain-English explanations, and a repeatable process you can reuse every year. Download the current W4 from IRS.gov, keep it basic, and let your pay stub math guide small tweaks through the year. If you’ve ever asked “Why did I owe so much?” or “Why is my refund huge again?”, this guide helps you fix the root cause with confidence. Enjoyed the episode? Subscribe, share it with a friend who just changed jobs, and leave a quick review to help others find the show.

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Transcript

SPEAKER_01 0:03

Welcome to My Pocket FP, the podcast where your wallet finally meets its financial planner and they actually get along. Join your host Jason Taylor, certified financial planner, money sensei, and your guide to financial freedom. Whether you're planning for retirement or just trying to figure out where all your money went last weekend, we've got you covered. Get ready to take control of your financial life with smart tips, surprising insights, and yes, an app that fits right in your pocket. This is My Pocket FP because your future deserves more than guesswork.

SPEAKER_00 0:46

Tax forms may not be glamorous, but understanding how they work can save employers and employees a lot of headaches down the road. Welcome back, everyone. I'm Julie Schwenzer, co-host and producer in the studio with Jason Taylor, certified financial planner and creator of My Pocket FP. Jason, thank you so much for joining us again.

SPEAKER_02 1:08

Thank you, Julie. Happy New Year.

When To Update Your W4

SPEAKER_00 1:10

Happy New Year. Oh boy, we need you today. Big question for you. When and how do employees fill in the W4 form for tax withholdings?

SPEAKER_02 1:21

Yes. Well, but before we get started, I want to mention that be prepared to uh pause this video and go step by step. Um it should be easier than actually going through the IRS instructions that have filled this out. Um I would also suggest going to the IRS website and actually downloading the W4 form. Um you can go to IRS.gov and just in the search type W4 form and it'll pop up and give you an option to click on the uh PDF version of the form. Um and that will help just go line by line rather than just listening to the podcast.

SPEAKER_00 1:56

And usually do employees receive something from their employer, a copy of the W4 to fill out or does that happen all the time?

SPEAKER_02 2:05

They usually only get it when they first apply for a job, and that doesn't always happen either. Sometimes they just get put in the default, and that's why it's important to always take a look at this. Um, you know, I tell clients to do it at least annually. Um, anytime there's a big change in life, um, you know, getting married, uh having uh kids, um, starting a side job with a 1099, or even having more than one job, it's good to take a look at this form.

Reviewing Withholding And Effective Tax Rate

SPEAKER_00 2:33

Yeah, those are good tips. Should we fill out a new W4 form each year? Does that make sense?

SPEAKER_02 2:39

Or it's always good to review it only because tax law changes all the time, and it could change the way you fill this form out. Um, you know, as with the you know, change in standard deduction every year can change how you fill this out. Um, you know, change in your donations and how you do your schedule A could change this form.

SPEAKER_00 2:59

Yeah, there's so many things um to consider. Thanks for mentioning all that. And then what does the employer do once it's submitted?

SPEAKER_02 3:09

Um most employers give it to the the payroll department and they plug into their hand it right off. Yeah. Um and you know, with that in mind, um, it's also important to know your effective tax rate. Um I bring that up because it's a good way to check whether you're having enough taxes taken out throughout the year. And in order to do this, you look at your previous year's tax return. Um, if you had it prepared by a uh professional, an accountant, it should have in your summary what your effective tax rate is. Uh, if not, you can go to your uh 1040 form from 2024 and just look at the lines you would divide your uh taxes divided by your taxable income to get that effective rate.

SPEAKER_00 3:55

Oh wow. And you mentioned big life changes that can happen that would prompt somebody to update their W4. Can you just do that in the middle of the year at any time?

SPEAKER_02 4:07

You can do that anytime, yes. Um, and that's also suggesting if there is a change, um change your W4 and then go back and look at your pay stub. So many people just, you know, one, they never you know review it. Um and and two, they never check their pay stuff to see if the right amount's taken out. Um a lot of times payroll will do it wrong, or the W4 won't calculate exactly how the right amount you want taken out. It's not a foolproof uh plan just to fill in the W4. Um, and so that's why you know they had that option of taking extra out on one of the lines of the W4. Uh and this is why you need to know your effective rate. Um, so when you look at your your pay stub, you can look at the federal withheld amount. Um, and every every pay stub is different, so I can't tell you line number or anything like that. Um, but look at your federal withholding and divide it by your taxable income. And that'll tell you the amount of tax withholding you're having taken out. That number should be higher than your effective tax rate if you don't want to owe taxes at tax time.

Common Payroll And Form Confusion

SPEAKER_00 5:17

Sure, sure. If you don't want to give them a loan, sure. Um I had a I had a question too. Like you mentioned a great point too, is about in the W4 making sure it's accurate when you are onboarding, you know, you're going to a new position with a job or something like that. And um have you seen this a lot with clients where there was possibly an issue when with the accuracy of their form when they did submit it to payroll?

SPEAKER_02 5:45

You know, there's very little support with with payroll on how to do this. Um, one, because I think it was like five years ago, they went and completely changed the form that they had for 20 years. So a lot of people in payroll and accounting were relearning the system themselves. You know, we had figured out how to do the W4 for the old system. Um, a lot of people didn't change their W4 W4 forms, and then they end up owing a lot of taxes. And that's when people come to us and say, Why did I owe them so many taxes? I didn't change anything. Um so it can be very confusing to fill these W4 forms out, and that's why we have actually a uh a booklet called Nichols and Newlyweds that we share with people. And we'll also share this video on um mypocketfp.com so people can review it. Um, just to do a simple version of the W4 and make adjustments as needed, not specifically the you know, tell them how many jobs you have, you know, tell them your withholdings. Um, just do the basic setup for W4 and then do the extra federal withholding as needed.

SPEAKER_00 6:55

And can you tell us too the difference between a W2 and a W4?

SPEAKER_02 7:02

Uh yes, uh a W4 is how you report to your employer slash their uh payroll department on what tax withholding you want taken out on your paycheck throughout the year to pay your taxes in advance. The W2 is at the end of the year, the employer slash payroll department report to the IRS how much actually was taken out for federal taxes, state taxes, and uh Social Security taxes.

W2 vs W4 vs W9 Explained

SPEAKER_00 7:37

And that that question was for the people who really don't like taxes and don't want to know about any of this, but it's really necessary. I mean, you're bringing up key points. And you know, in conversations we had uh before we started recording this session, you mentioned that this is one of the most common questions you get asked is about the W4. Is that has that been the case like throughout your career?

SPEAKER_02 8:01

You know, it's it has been a lot more since they changed the form. Um, because you know everybody kind of figured out how to fill it out. Um, and it the change of the form just changed the calculation altogether, and it it had additional questions which were supposed to make it more accurate, actually made it more confusing for a lot of people.

SPEAKER_00 8:22

Yeah, you definitely hit the nail on the head because it's like I remember you know anytime I saw a new position or it was with like, you know, you get hired in a group, and let's say you're at orientation and you have to do all those forms. I mean, how many times you heard that question? Wait, what should I check? What should I do? Because it it's amazing, it's a short form, but it's still confusing.

SPEAKER_02 8:42

Right. It's all the extra pages, you know, that say, well, look at this and fill this out to figure out this number. Um, and that's that's why, like I said, in our in our uh Nichols and Newlyweds booklet, it gives you a step-by-step simplified way to do this.

SPEAKER_00 8:56

Um where do you get the booklet? Is it just on your website?

SPEAKER_02 9:00

Uh we'll make it, we'll make it available on the mypocketfp.com, yes.

SPEAKER_00 9:03

Oh, awesome.

SPEAKER_02 9:04

It's currently in revision stage, so it's it has to get put back out there.

SPEAKER_00 9:08

Oh, we'll be waiting for that. We'll check in on the the next podcast session. Um for small business owners, what is a big mistake that you see when they're handling W4s?

Small Business Owner Pitfalls

SPEAKER_02 9:24

Uh well, uh I like you mentioned before, um, one of the biggest mistakes mistakes is not having their employees fill it out. Now, uh payroll companies are great about getting that initial paperwork to employees. Um, but a lot of small um business owners, um, they forget to have the employee fill out the W4, um, which you know legally they need you know certain forms, the I9 and W4 to work there. Um another uh thing to to mention because there's also the W9 form. And so the W9 is for when there's no taxes taken out. Where the W4 is if you're having taxes taken out. And that's important because a lot of people don't realize until the year in that there were no taxes taken out, and they actually filled a W9 versus W4. So that's another important thing to point out to people is if you're asked to fill a W9, to be prepared to hold taxes back yourself.

SPEAKER_00 10:23

Oh yeah, that's a that's a huge one. And and a nice, I mean that that's a nice kick in the pants at the I think, oh, I do owe. I do owe a lot more than I thought.

SPEAKER_02 10:32

That really catches a lot of people off guard.

SPEAKER_00 10:35

And what do you suggest to employers too to safely store and retain the W4s? Um, because it of course it you know contains also sensitive information along with that I9.

SPEAKER_02 10:48

Yeah, I'm I'm kind of old fashioned. I like the locked filing cabinet.

SPEAKER_00 10:52

Yes.

SPEAKER_02 10:53

It works. It works, yes. Um, but you know, it is good to have it, you know, in uh box.com or Dropbox or you know, some safe, secure online portal as well. Going back to the whole you know, payroll company thing, um, I tell all my clients with small businesses is a great idea to hire a payroll company.

Aim For Break Even With Simple Setup

SPEAKER_00 11:12

Because yeah, that's what they specialize in, and they have to do this all day. Exactly. Yes. You brought good tips about the W4 because I know for a lot of people too, they you know it's not fun. It's not fun to fill out all this information. They want to just get it over with, but making mistakes on it can cost a lot. And and if they make a mistake on it, let's say that they they got more money taken out than they should have, um, is there a good chance that they'll see that in their refunds? Will the IRS cash that, or does that take time for it to well no, yeah.

SPEAKER_02 11:46

If they have too much ta tax taken out, it will come out when they do their tax return. Yeah, they'll they'll get their money back. But like you said, you know, early in our conversation, that's like a free loan to the government.

SPEAKER_00 11:58

Yes.

SPEAKER_02 11:58

Um, so it's most of my clients break-even is the goal.

SPEAKER_00 12:03

Okay, and and on the W4, there is there any other questions that you see a lot from clients on it? Like what's the main question they ask about that they find that it's hard to, you know, how do I answer this one line?

SPEAKER_02 12:16

Because Yeah, and that's why I say keep it simple, um, fill it out, you know, basic, basic, basic. You know, don't worry about you know your deductions and all this stuff. Just go with the standard deduction. Um, and then look at your pay stub and to see if that effective tax rate and the amount you're having to withheld is close. And if it's way off, then you just make an adjustment with the the one line on the W4, the extra federal withholding.

SPEAKER_00 12:46

Oh, thank you so much, Jason, for breaking this down clearly. I think everybody, this is a great timing, too, for this episode. So we appreciate you wanting to talk about this subject. Thank you for walking us through.

SPEAKER_02 12:55

It is a good time to take a look at those uh W4s now as the a new year comes upon you.

SPEAKER_00 13:01

That's what we're seeing now is oh, the deadlines are starting to pop up everywhere. And like now, we're getting reminders, it's coming. All these deadlines are coming. So well, thanks again, Jason. We'll talk to you soon.

SPEAKER_01 13:12

Thank you, Julie. Thanks for tuning in to My Pocket FP, where we believe small monthly changes can make big positive changes in your financial end game. If you're ready to level up your money game, head over to mypocketfp.com and download the app today. Your financial planner is now officially pocket sized and doesn't charge by the hour. Until next time, keep your goals high, your debt low, and your pockets smart.