question regarding W4
Yes. W4 determines how much your employer will withhold from your wages. Leaving everything at default would mean that your salary is your only taxable income, and you only take default deductions. Your employee will calculate your tax withholding based on that. But, if your salary is >200k, I assume that you have other income (investment/capital gains, interest on your bank account), which you will have to pay taxes on. You're probably going to have some deductible expenses (business/partnership expenses, mortgage interest, donations, college funds etc) as well. So it is very likely, unless you're really not smart about money, that you have more to do with your taxes than just the employers' withholding. There are still ways that the default values on the W4 can lead you to get a refund or owe the IRS. If there was a big delta in your paychecks, it can lead to problems. If you make 260,000 and get 26 paychecks that means each check had a gross of 10,000. Your company will withhold the same amount from each check. But If you earned a big bonus then the smaller regular paychecks may not have been withholding enough.  When bonus checks are involved the payroll office has to treat them as irregular pay to be able to make it work out. Some companies don't do this, so you may under or over pay during the year. If you changed companies during the year, this can lead to under or over payment. The lower paying company would not know about the higher rate of pay at the other company. so at one you would under pay, and the other you would over pay. There are also social security issues with more than one employer.
Real world case: IRS:  You owe us $x.  You didn't report your income from job y. My mother:  I didn't work for y.  I don't even know who y is. IRS:  If the W-2 is wrong, talk to them to get it fixed. My mother:  I can't find y.  Please give me an address or phone. IRS:  We can't.  You talk to them and get it fixed. I know this dragged on for more than a year, they never mentioned the final outcome and they're gone now so I can't ask. First, we need to be clear about what the allowances on your W-4 mean. The more allowances you claim, the lower tax liability it is assumed that you have, and they will take less tax out of your check. So claiming 2 allowances will result in a bigger paycheck and less tax withholding than claiming 0 allowances would.  If you claim 0 allowances, you are in no danger of having too little tax withheld; instead, that would result in the maximum tax withheld. So 0 allowances is certainly an option, if you want to play it safe.  This being your first year with these jobs, it's hard to know what to claim on your W-4. When you do your taxes next year, you can see if the withholding was too much or just right; if your refund is too big, you can increase your allowances for next year.  That having been said, I don't like getting big refunds; I'd rather have a bigger paycheck all year. If I were you, I'd probably claim 1 or 2 allowances at the new job, and adjust it next year if needed. At your income level, you aren't really in any danger of getting in trouble for having too little withheld.  Good luck with the new job. Game testing has always seemed like a dream job to me. :) I edited my W4 over several years, trying to get rid of my refund.  It's a balancing act, just be careful to not owe more than about $1000 each year.  They can hit you with a small penalty.  It's never been enough to concern me, but it's there. It's also a balancing act if you get a raise, a bonus, any kind of differences in pay... The IRS offers an online calculator to help you select the correct number of deductions on your W-4. The tricky part is that we're nearly half-way through the year, so if you add more deductions to offset the lower withholding during the first half of the year, you'll have to update the W-4 at the beginning of next year to correct that next year. "So after a great deal of clarification, it appears that your question is how to adjust your withholding such that you'll have neither a refund, or a balance due, when you do your 2016 taxes next year.  First, a little terminology. The more you have withheld, the more money will be taken out of your check to cover your estimated tax liability. Confusingly, the more allowances you select on your W-4, the less money you will have withheld (more allowances means more dependents/deductions/other reasons why you will owe less tax). When you go to file your 2015 tax return next year, you'll figure out exactly how much you owe. If you had too little tax withheld, you'll have to pay the difference. If you had too much tax withheld, you'll get a refund back.  Given your situation, simply following the instructions on the W-4 should work pretty well. If you want to be more precise, you can use the IRS Withholding Calculator to figure the number of allowances and submit a new W-4 to your employer.  It's a little hard to tell whether ""paying this much/year in taxes seem steep?"" because you've lumped all the taxes together in one big bucket. Does the $543.61 in taxes per paycheck include Social Security (OASDI) and Medicare taxes? Whatever you do, it's not going to be an exact science. Come tax time, you'll figure out exactly what you owe and either pay the balance or get a refund back. As long as you're relatively close, that's fine. You can always adjust your withholding again next year after you've done your taxes." I believe moving reimbursement has to be counted as income no matter when you get it. I'd just put it under miscellaneous income with an explanation. The reciprocity agreement in the Washington DC area means that you only pay income taxes where you live, not where you work. Because you live in Maryland you only need to pay income taxes to Maryland. You need to do the following things. Line 3. If you are not subject to Virginia withholding, check the box   on this line. You are not subject to withholding if you meet any one   of the conditions listed below. Form VA-4 must be filed with your   employer for each calendar year for which you claim exemption from   Virginia withholding.  (a) You had no liability for Virginia income tax   last year and you do not expect to have any liability for this year. ... (d) You are a domiciliary or legal resident of   Maryland, Pennsylvania or West Virginia whose only Virginia source   income is from salaries and wages and such salaries and wages are   subject to income taxation by your state of domicile. My company has its only office in Maryland, and conducts all of its   business there. Several of our employees are Virginia residents who   commute to work on a daily basis. Are we required to withhold Virginia   income tax from their wages? No. Because your company is not paying wages to employees for services   performed in Virginia, you are not required to withhold Virginia tax.   If you would like to withhold the tax as a courtesy to your employees,   you may register for a Virginia withholding tax account online or by   submitting a Registration Application. Additional withholding per pay period under agreement with employer.   If you are not having enough tax withheld, you may ask your employer   to withhold more by entering an additional amount on line 2. Here's an answer received elsewhere. Yes, it looks like you have a pretty good understanding the concept   and the process. Your wife's income will be so low - why? If she is a full-time student in any of those months, you may   attribute $250 x 2 children worth of income for each of those months. Incidentally, even if you do end up paying taxes on the extra $3000,   you won't be paying the employee's share of Social Security and   Medicare (7.65%) or state disability on those funds. So you still end   up saving some tax money. No doubt, there's no need to remind you to be sure that you submit all   the valid receipts to the administrator in time to get reimbursed.  And a must-have disclaimer:   Please be advised that, based on current IRS rules and standards, any advice contained herein is not intended to be used, nor can it be used, for the avoidance of any tax penalty that the IRS may assess related to this matter. Any information contained in this email, whether viewed or subsequently printed, cannot be relied upon as qualified tax and accounting advice. ... Any information contained in this email does not fall under the guidelines of IRS Circular 230. Since you worked as an RA, the university should send you a W2 form. The taxable wages line in that form would be the sum of both the direct salary and employer paid benefits that are taxable. As such you should not need to do anything than enter the numbers that they provide you. If you're correct that it's not taxable because it's non-taxable reimbursement (which is supported by your W-2), then it should not go on your 1040 at all.  If it is taxable, then it really should have appeared on your W-2 and would probably end up on Line 7 of your Form 1040. The purpose of making sure you met the safe harbor was to avoid the penalty. Having achieved that goal the tax law allows you to wait until April 15th to pay the balance. So do so.  Put enough money aside to make sure you can easily make that payment.  I was in this exact situation a few years ago. I planned my w4 to make the safe harbor, and then slept easy even though the house settlement was in May and I didn't have to make the IRS payment unti 11 months later in April. "The decision whether this test is or is not met seems to be highly dependent on the specific situation of the employer and the employee.  I think that you won't find a lot of general references meeting your needs. There is such a thing as a ""private ruling letter,"" where individuals provide specific information about their situation and request the IRS to rule in advance on how the situation falls with respect to the tax law.  I don't know a lot about that process or what you need to do to qualify to get a private ruling.  I do know that anonymized versions of at least some of the rulings are published.  You might look for such rulings that are close to your situation. I did a quick search and found two that are somewhat related: As regards your situation, my (non-expert) understanding is that you will not pass in this case unless either (a) the employer specifies that you must live on the West Coast or you'll be fired, (b) the employer would refuse to provide space for you if you moved to Boston (or another company location), or (c) you can show that you could not possibly do your job out of Boston.  For (c), that might mean, for example, you need to make visits to client locations in SF on short-notice to meet business requirements.  If you are only physically needed in SF occasionally and with ""reasonable"" notice, I don't think you could make it under (c), although if the employer doesn't want to pay travel costs, then you might still make it under (a) in this case." You are correct that W-4s are very confusing for multiple income homes, and even more so if you change salary significantly during the year.  There are just too many variables in those situations to provide an effective, simple form. Unfortunately, the best way to get accurate withholdings is trial-and-error.  Try and estimate how much tax you'll have to pay for the year.  There are several calculators out there, but essentially you can take your gross income, subtract the standard exemptions for you and all dependents, subtract the standard deductions (or estimate your itemized deductions), and compute your tax based on the federal tax tables.  Then subtract any tax credits you may be eligible for. Then estimate your withholdings for the year by multiplying your current withholdings by the number of pay periods left, and adding your YTD withholdings.  If your total withholdings are higher than your estimated tax, add one or two exemptions to reduce your withholdings (and vice versa).   If all that sounds like a lot of work (which it is), at a minimum make sure you withhold as much tax as you paid last year.  That way you avoid any tax penalties, but might have a tax bill when you file.  If you want to be conservative and withhold a little extra that's fine - you might even end up with a refund when you file.  The good news is it doesn't have to be exact; any difference will determine what you pay (or what refund you get) when you file. An update for anyone looking this up, I am still working through all the details but I can answer the question as far as Stack Exchange will go. In this situation the answer and processes involved greatly differs based on the personal circumstances of the person asking the question. Best to seek qualified tax advice than relying only on a forum as they are able to be more accurate and descriptive than any reply that you might receive. Follow the instructions on the W-4. It says exactly how you are supposed to calculate the number of allowances. You shouldn't have to figure out how to get the right number. Just follow the instructions. The only part at all complex is if you have large deductions. In that case you're supposed to subtract a standard amount from your actual deductions -- for 2017, $12,700 if married filing jointly -- divide by $4,050, and then add the result to the number of allowances. In general, following the instructions on the W-4 should result in slightly more tax being withheld from your paycheck than you actually owe, so that you get a modest refund next April 15. In the long run it doesn't matter if you have too much withheld, as you'll get it all back eventually anyway. I suppose the withholding could be so high that it doesn't leave you enough to live on while waiting for your refund, but that shouldn't normally be the case. If you pay too little, you could be subject to penalties and interest, so you really want to avoid that.