Recovering over-contribution to Social Security between two employers?
This is a common occurrence when somebody has multiple jobs in one year. The employer can't know if you have reached the annual limit. They know to stop when you have hit the maximum for their company, but don't have information on the other jobs. In fact the IRS doesn't let them factor in the other jobs. They have to keep making their payment until you hit the max for their company. When you fill out the 1040 there will be a line that checks that the total social security amount for each person was not over the annual limit. The extra will be refunded when you file your taxes. In the future if this happens again you can adjust your withholding to minimize the overage. For the example given in the question to get the 4K extra sooner, increase the number of allowances on the W-4.  You can under withhold federal income tax because you will over withhold social security tax.
For Federal Return, Schedule H and its Instructions are a great start.  You are the nanny's employer, and are responsible for FICA (social security and medicare) withholding, and also paying the employer portion.  You will offer her a W4 so she can tell you how much federal and state tax to withhold. You'll use Circular E the employer's tax guide to calculate withholding. In January, you'll give her a W-2, and file the information with your own tax return.  For State, some of the above applies, but as I recall, in my state, I had to submit withholding quarterly separate from my return. As compared to Federal, where I adjusted my own withholding so at year end the tax paid was correct. Unemployment insurance also needs to be paid, I believe this is state.  This issue is non-political - I told my friends at the IRS that (a) the disparity between state and federal to handle the nanny tax was confusing for those of us trying to comply, and (b) even though we are treated as an employer, a 'guide to the nanny tax' would be helpful, a single IRS doc that doesn't mix non-nanny type issues into the mix.  In the end, if a service is cost effective, go for it, your time is valuable, and thi is something that only lasts a few years. "Employers withhold at rates specified in Circular E issued by the IR. You can request that  additional money be withheld (not an issue here) or you can have  reduced withholding by claiming additional allowances on a W-4 (i.e.,  more than just for you and spouse and dependents) if you believe that  this will result in withholding that will more closely match the tax due.  (Note added in edit):Page 2 of the W-4 form has worksheets that can be used to figure out how many additional allowances to request. Also, I wonder if your withholding will be 37% or final tax bill be  26% of your adjusted gross income.  The tax brackets are the tax  on marginal income. If you are in the 28% tax bracket, you owe 28 cents in tax for each additional dollar of income, not 28 cents in tax for every dollar of income.  Your overall tax might well be less than 20% of your income.  As a specific example, in 2011 a married taxpayer filing jointly would be in the  (highest) 35% tax bracket if the taxable income was $379,150 or more (marginal tax rate of 35% is applicable to every dollar more than $379,150) but the tax on  $379,150 itself works out to be $102,574 or 27.05% of the taxable income. So if you do expect to be earning around $350K or more in salary between now and December 31 to hit that 26% that you expect you will owe, you might want to consider paying a tax accountant for advice on how to fill out your W-4 form for your new employer rather than relying on an Internet forum such as this for free advice. Note added in edit:  Your comment ""... it is a cocktail of ... federal taxes, state taxes, local taxes, health care ..."" on the earlier version of my answer does raise the question of whether you want your employer to withhold 26% instead of 37% and have the money go to meet all these obligations or just 26% towards your Federal income tax liability only. The Federal W-4 form affects only how much money is withheld from your paycheck and sent to the US Treasury.  Some of the money that each of your employers withholds (Social Security and Medicare taxes) is not affected by what you put down on  the W-4 form.  Now, if you hold two jobs and the total income shown on your W-2s is larger than the SS limit, you will  have had too much Social Security taxes withheld, and the excess will be a credit towards your Federal income tax liability.  You have self-employment income too on which you owe Social Security and Medicare taxes and you are making estimated tax payments. The excess Social Security tax payment can count towards this too (as well as income tax on your Schedule C income).  Thus, if your new employer is withholding too much, you might be able to skip making the fourth quarterly payment of estimated tax or make a reduced payment (there is no requirement that the four installments  must be equal).  In short, there are lots of ramifications that you need to take into account before deciding that 26% is the right number. Instead of filling out a W-4  all by yourself right away, I strongly recommend  reading up a lot on income taxes, or play with a tax preparation program (last year's version will do a pretty good job of at least getting you in the right ballpark), or consult with a tax accountant." Here are the advantages to the HDHP/HSA option over the PPO option, some of which you've already mentioned: Lower premiums, saving $240 annually. Your employer is contributing $1500 to your HSA.  As you mentioned, this covers your deductible if you need it, and if you don't, the $1500 is yours to keep inside your HSA. The ability to contribute more to your HSA.  You will be able to contribute additional funds to your HSA and take a tax deduction. Besides the medical expenses applied to your deductible, HSA funds can be spent on medical expenses that are not covered by your insurance, such as dental, vision, chiropractic, etc.  Anything left in your HSA at age 65 can be withdrawn just like with a traditional IRA, with tax due (but no penalty) on anything not spent on medical expenses. With the information that you've provided about your two options, I can't think of any scenario where you'd be better off with the PPO.  However, you definitely want to look at all the rest of the details to ensure that it is indeed the same coverage between the two options.  If you find differences, I wrote an answer on another question that walks you through comparing insurance options under different scenarios. "The limit on SEP IRA is 25%, not 20%.  If you're self-employed (filing on Schedule C), then it's taken on net earning, which in your example would be 25% of $90,000. (https://www.irs.gov/retirement-plans/retirement-plans-for-self-employed-people) JoeTaxpayer is correct as regards the 401(k) limits.  The elective deferrals are per person - That's a cap in sum across multiple plans and across both traditional and Roth if you have those.  In general, it's actually across other retirement plan types too - See below. If you're self-employed and set-up a 401(k) for your own business, the elective deferral is still aggregated with any other 401(k) plans in which you participate that year, but you can still make the employer contribution on your own plan. This IRS page is current a pretty good one on this topic:  https://www.irs.gov/retirement-plans/one-participant-401k-plans Key quotes that are relevant: The business owner wears two hats in a 401(k) plan: employee and employer. Contributions can be made to the plan in both capacities. The owner can contribute both: •Elective deferrals up to 100% of compensation (“earned income” in the case of a self-employed individual) up to the annual contribution limit:  ◦$18,000 in 2015 and 2016, or $24,000 in 2015 and 2016 if age 50 or over; plus •Employer nonelective contributions up to:  ◦25% of compensation as defined by the plan, or ◦for self-employed individuals, see discussion below It continues with this example: The amount you can defer (including pre-tax and Roth contributions) to all your plans (not including 457(b) plans) is $18,000 in 2015 and 2016. Although a plan's terms may place lower limits on contributions, the total amount allowed under the tax law doesn’t depend on how many plans you belong to or who sponsors those plans. EXAMPLE Ben, age 51, earned $50,000 in W-2 wages from his S Corporation in 2015. He deferred $18,000 in regular elective deferrals plus $6,000 in catch-up contributions to the 401(k) plan. His business contributed 25% of his compensation to the plan, $12,500. Total contributions to the plan for 2015 were $36,500. This is the maximum that can be contributed to the plan for Ben for 2015. A business owner who is also employed by a second company and participating in its 401(k) plan should bear in mind that his limits on elective deferrals are by person, not by plan. He must consider the limit for all elective deferrals he makes during a year. Notice in the example that Ben contributed more that than his elective limit in total (his was $24,000 in the example because he was old enough for the $6,000 catch-up in addition to the $18,000 that applies to everyone else).  He did this by declaring an employer contribution of $12,500, which was limited by his compensation but not by any of his elective contributions. Beyond the 401(k), keep in mind that elective contributions are capped across different types of retirement plans as well, so if you have a SEP IRA and a solo 401(k), your total contributions across those plans are also capped.  That's also mentioned in the example. Now to the extent that you're considering different types of plans, that's a whole question in itself - One that might be worth consulting a dedicated tax advisor.  A few things to consider (not extensive list): As for payroll / self-employment tax: Looks like you will end up paying Medicare, including the new ""Additional Medicare"" tax that came with the ACA, but not SS: If you have wages, as well as self-employment   earnings, the tax on your wages is paid first.   But this rule only applies if your total earnings   are more than $118,500. For example, if you   will have $30,000 in wages and $40,000 in selfemployment   income in 2016, you will pay the   appropriate Social Security taxes on both your   wages and business earnings. In 2016, however,   if your wages are $78,000, and you have $40,700   in net earnings from a business, you don’t pay   dual Social Security taxes on earnings more   than $118,500. Your employer will withhold   7.65 percent in Social Security and Medicare   taxes on your $78,000 in earnings. You must   pay 15.3 percent in Social Security and Medicare   taxes on your first $40,500 in self-employment   earnings and 2.9 percent in Medicare tax on the   remaining $200 in net earnings. https://www.ssa.gov/pubs/EN-05-10022.pdf Other good IRS resources:" That's about right.  I know a friend of mine who took a redundancy package after working at a firm for forty years. He got four weeks pay for every year he worked, and then a lump sum along with his finally salary pension, as he was two years from preretirement age anyway.  He walked away with about £250,000 by the end of it all I think. "Having dealt with with Social Security, state agencies, and banks more than I'd care to, I would urge you to do the following: 1) Get a 100% clear answer on whether or not you are listed as ""joint"" or ""authorized user/signer"" for an account. This will probably require a call to the bank, but for less than an hour of you and your friend's time you will save yourself a whole lot of hassle. The difference is like this: if you worked at a business that added you as an authorized user for a credit or debit card, this would allow you to use the card to buy things. But that doesn't make the money in the bank yours! On the other hand if you are listed as ""joint"", this regards ownership, and it could become tricky to establish whether its your money or not to any governmental satisfaction. 2) You are completely correct in being honest with the agency, but that's not enough - if you don't know what the facts are, you can't really be honest with them. If the form is unclear it's ok to ask, ""on having a bank account, does being listed as an authorized user on someone else's account count if it isn't my money or bank account?"" But if you are listed as holding the account jointly, that changes the question to: ""I am listed as joint on someone else's checking account, but it isn't my money - how is that considered?"" To Social Security it might mean generating an extra form, or it might mean you need to have the status on the account changed, or they might not care. But if you don't get the facts first, they won't give you the right answers or help you need. And from personal experience, it's a heck of a lot easier to get a straight and clear answer from a bank than it is from a federal government agency. Have the facts with you when you contact them and you'll be ok - but trust me, you don't want them guessing!" Don't panic this happens all the time. I looked online for a form that can be used to redeposit funds back into the HSA. This form can be used to redeposit funds withdrawn in error and cannot   be used to correct an Excess Contribution Return. Funds will be posted   as a correction and not as a contribution. The deposit will be entered   for the year the distribution occurred. It allows you to specify the year the incorrect distribution occurred. I authorize Optum Bank to make the withdrawal correction indicated   above. I have enclosed a check made payable to Optum Bank for the   amount I’d like redeposited to my account. I understand that this can   result in a possible corrected 1099-SA for the tax year indicated   above. Of course you need to get the forms for your account. "You definitely need more information. This could be a number of things. First of all I don't understand the reason for the 48 hours. I would definitely ask them to clarify why this is the case. Why are they noticing this a year later?  You are indeed a participant in the company 401k. the plan is theirs, and you are agreeing to play by their rules when you enroll. I would call HR and get more info. This could be excess contribution or a ""bank error in your favor"" that they have found. It sounds like they over matched your 401k sense they want the money back."