You sat down to start a new job, hit the W-4, and went looking for the box where you write "0" or "1." It is not there. If you have been told your whole life that claiming 0 means a bigger refund and claiming 1 means more money per paycheck, the redesigned form looks like someone moved your furniture. So is it better to claim 0 or 1 on a W-4? The honest answer: that question no longer maps to the form. But the goal behind it absolutely still applies, and you can still dial your withholding up or down. Let me translate the old mindset into what the new form actually asks.
Why allowances are gone (and what replaced them)
The IRS overhauled Form W-4 starting in 2020. The old form ran on "allowances" — each one you claimed told your employer to hold back a little less tax. Zero allowances meant the most withholding (smallest paychecks, biggest refund). One or more meant less withholding (bigger paychecks, smaller refund). It was a crude dial, and it was tied to the personal exemption, which the 2017 tax law set to zero. With nothing to exempt, allowances stopped making sense.
The new W-4 no allowances design replaces that single dial with plain-English steps. Instead of guessing a number, you give your employer real inputs: whether you have a second job, dependents you can claim, other income, and any extra dollar amount you want withheld. The form does the translating. So when someone asks about claiming 0 vs 1 on taxes today, what they really mean is: do I want my paycheck withholding to run high (refund) or lean (more cash now)? You control that — just through different boxes.
What the new W-4 actually asks
The form has five steps. For most single people, two of them are mandatory and the rest are optional adjustments. Here is what each one does to your paycheck.
| Step | What it covers | Effect on withholding |
|---|---|---|
| Step 1 | Name, address, Social Security number, filing status | Required. Filing status sets your baseline. |
| Step 2 | Multiple jobs or a working spouse | Increases withholding to account for combined income. |
| Step 3 | Dependents and other credits | Decreases withholding (you owe less, so less is held). |
| Step 4(a) | Other income not from a job (interest, dividends) | Increases withholding. |
| Step 4(b) | Deductions beyond the standard deduction | Decreases withholding. |
| Step 4(c) | Extra withholding per pay period | Increases withholding by exactly that dollar amount. |
| Step 5 | Signature and date | Required. Form is invalid without it. |
Notice the pattern: Step 3 and Step 4(b) push your withholding down; Step 2, 4(a), and 4(c) push it up. That is your real dial. If your old instinct was "claim 0 to be safe," the modern version of safe is to skip the downward steps and, if you want a cushion, add a flat amount in Step 4(c).
How to fill out a W-4: single, no dependents
This is the most common beginner case, so let me walk it cleanly. If you are single, have one job, and no dependents, the entire process is short. Here is how to fill out a W-4 single no dependents in practice.
- Step 1: Personal infoEnter your name, address, SSN, and check "Single or Married filing separately."
- Step 2: Skip itOnly one job? Leave this blank. This is the default that matches the old "claim 1."
- Step 3: Enter $0 or leave blankNo dependents means nothing here. This keeps withholding from dropping.
- Step 4: OptionalWant a bigger refund? Add a dollar amount in 4(c). Otherwise leave blank.
- Step 5: Sign and dateUnsigned forms are invalid. Hand it to payroll, not the IRS.
That baseline — Steps 1 and 5 only — produces withholding roughly equivalent to the old "single, 1 allowance" or even "2 allowances," because the standard deduction is now baked into the IRS withholding tables. In other words, the new default leans toward bigger paychecks, not a big refund. If you specifically want the old "claim 0" feel, you have to take action: add extra withholding in Step 4(c).
Claiming 0 vs 1 on taxes, translated to real numbers
Let me show the math with a plausible example. Say you are single, earn $52,000 a year, and are paid twice a month (24 paychecks). The exact figures depend on the current year's IRS tables, so treat these as rounded estimates to illustrate the mechanics, not a quote of this year's numbers.
- Baseline (Steps 1 and 5 only): Federal income tax withheld might run around $260 per paycheck. Over the year that is roughly $6,240. If your actual tax bill lands near that, you break even — small refund or small amount owed.
- Old "claim 0" feel (add $50 in Step 4(c)): Now about $310 per paycheck, or roughly $7,440 a year. You have overpaid by about $1,200, which comes back as a refund.
- Old "claim 1" feel (baseline, nothing extra): You keep the larger paycheck and aim to break even, accepting that you might owe a little in April.
Here is the catch: a refund is not a bonus. It is your own money the government held interest-free for up to a year. A $1,200 refund is $100 a month you could have had in a high-yield savings account earning interest the whole time. That is the central trade behind claiming 0 vs 1 — psychological comfort versus cash flow.
How to use the W-4 to break even at tax time
For a lot of people, the smartest target is neither a big refund nor a surprise bill — it is roughly breaking even. To use your W-4 to break even at tax time, you want total withholding for the year to land close to your actual tax liability. The cleanest way to estimate that is the IRS Tax Withholding Estimator, a free tool that asks for your pay, withholding so far, and any other income, then tells you whether to adjust.
The workflow is simple. Grab a recent pay stub, run the estimator partway through the year, and if it says you are short, bump up Step 4(c) by the suggested per-paycheck amount. If it says you are over-withholding, you can submit a fresh W-4 reducing or removing that extra amount. You can file a new W-4 anytime — there is no annual limit, and a raise, a side gig, or a second job is a good trigger to redo it. If you are not sure how to read the withholding line on your stub, see how to read a pay stub.
What actually drives your withholding
Common mistakes that wreck your withholding
The redesigned form is clearer, but it creates a few new traps — mostly because people apply old habits to it.
- Forgetting Step 2 with two jobs. If you work two jobs and leave Step 2 blank on both, each employer withholds as if it is your only income. You can end up badly under-withheld and owing in April. Check the Step 2(c) box on both W-4s, or use the worksheet.
- Treating Step 3 as the old allowances box. Step 3 is a dollar amount for credits (like the child tax credit), not a number of people. Writing "1" there could cut your withholding by far more than you intend.
- Chasing the biggest refund on purpose. Over-withholding feels safe, but you are lending money for free. If you carry credit-card debt, that refund money would do more working against your balance — see how much extra to pay on a credit card.
- Never updating it. A mid-year raise or a new side hustle changes the math. Revisit the form when your income changes.
Run your own numbers before you sign
Abstract advice only goes so far. Before you hand the form to payroll, it helps to see how a given Step 4(c) amount actually changes your take-home pay, and what your overall tax picture looks like. Plug in your salary, pay frequency, and any extra withholding to compare the baseline against a refund-oriented setup side by side.
See exactly how your W-4 choices change your take-home pay before you commit.
Open the paycheck calculatorOnce you have a number you like, the form takes five minutes. And remember the underlying truth that survives the redesign: withholding is just a savings-and-cash-flow preference dressed up as a tax form. There is no objectively "correct" answer between a refund and a bigger paycheck — only the one that fits how you actually manage money. For the bigger picture on how withholding fits your gross-to-net pay, see gross vs net pay explained.