When are payroll taxes due in the US?
It depends on the size of the payroll, not on the number of employees.  Probably you need to file Form 941 quarterly under this scenario.  You may or may not need to deposit taxes more frequently.  If you must deposit, then you need to do it electronically. I excerpted this from the instructions for Form 941: If your total taxes (line 10) are less than $2,500 for   the current quarter or the preceding quarter, and you   did not incur a $100,000 next-day deposit obligation   during the current quarter. You do not have to make a deposit. To avoid a penalty, you must pay the amount in full with a timely filed return or you must deposit the amount timely. ... If you are not sure your total tax liability for the current quarter will be less than $2,500 (and your liability for the preceding quarter was not less than $2,500), make deposits using the semiweekly or monthly rules so you won't be subject to failure to deposit penalties. If your total taxes (line 10) are $2,500 or more for the   current quarter and the preceding quarter.  You must   make deposits according to your deposit schedule. See   section 11 of Pub. 15 (Circular E) for information and rules   about federal tax deposits. I would say that probably for two employees, you need to deposit by the 15th of each month for the prior month, but you really need to check the limits above and the deposit schedule in Pub 15 (as referenced above) based on your actual payroll size. Note that if you have a requirement to deposit, that must be done either through EFTPS or by wire-transfer.  The former is free but requires registration in advance of your first payment (they snail-mail you a PIN that you need to log-in) and it requires that you get your payment in by the night before.  The latter does not incur a charge from the IRS, but your bank will likely charge you a fee.  You can do the wire-transfer on the due date, however, so it's handy if don't get into ETFPS in time. This is all for federal.  You may also need to deposit for your state, and then you'll need to check the state's rules.
This is bullshit. The US government requires taxes to be paid in USD. There's your intrinsic value. If you want to be compliant with the federal law, your business and you as an individual are required to convert assets or labor into USD to pay them. "How/when does my employer find out? Do they get a report from their   bank stating that ""check 1234 for $1212.12 paid to John Doe was never   deposited"" or does it manifest itself as an eventual accounting   discrepancy that somebody has to work to hunt down? The accounting department or the payroll company they use will report that the check was not deposited. The bank has no idea that a check was written, but the accounting deportment will know.  The bank reports on all the checks that were cashed. Accounting cares because the un-cashed check for $1212.12 is a liability. They have to keep enough money in the bank to pay all the liabilities. It shouldn't be hard for them to track down the discrepancy, they will know what checks are outstanding. Can my employer punish me for refusing the money in this way? Do they   have any means to force me to take what I am ""owed?"" They can't punish you. But at some time in the future they will will tell their bank not to honor the check. They will assume that it was lost or misplaced, and they will issue a new one to you.  When tax time comes, and I still have not accepted the money, would it   be appropriate to adjust my reported income down by the refused   amount? You can't decide not to report it. The company knows that in year X they gave you a check for the money. They are required to report it, since they also withheld money for Federal taxes, state taxes, payroll taxes, 401K, insurance. They also count your pay as a business expense.  If you try and adjust the numbers on the W-2  the IRS will note the discrepancy and want more information. Remember the IRS get a copy of every W-2.  The employer has to report it because some people who aren't organized may not have cashed a December check before the company has to generate the W-2 in late January. It would confuse everything if they could skip reporting income just because a check wasn't cashed by the time they had to generate the W-2." In the US there is no set date. If all goes well there are multiple dates of importance. If it doesn't go well the budget process also may include continuing resolutions, shutdowns, and sequestrations. "You are on the right track, for tax purposes its all ordinary income at the end of 2016. If the free lance ""employer"" will withhold fed,state and local tax, then that takes care of your estimated tax. If they can't or won't, you will need to make those estimates and make payments quarterly for the fed and state tax at your projected tax liability.  Or, you can bump up withholding by your day job employer and cover your expected tax liability at year end without making estimated tax payments." As others have said, make sure you can and do file your taxes on a cash basis (not accrual). It sounds like it's very unlikely the company is going to issue you a 1099 for invoices they never paid you. So you just file last year's taxes based on your income, which is the money you actually received. If they do pay you later, in the new year, you'll include that income on next year's tax return, and you would expect a 1099 at that time. Side note: not getting paid is unfortunately common for consultants and contractors. Take the first unpaid invoice and sue them in small claims court. After you win (and collect!), tell them you'll sue them for each unpaid invoice in turn until they pay you in full. (You might need to break up the lawsuits like that to remain under the small claims limit.) To the best of my knowledge, there's no firm date requirement. The fiscal year for the US Federal Government starts on October 01, but if my memory serves me right, last time a budget was approved before the fiscal year started was during the Clinton administration. You should be receiving monthly P&amp;L statements at the very least. Who did you have filing taxes, doing payroll, performing audits? It seems that many restaurants and bars have a slippery cash issue where profits seem to just slide out the doors. Everyone touching cash might be skimming and if the manager is doing all the totals and reconciling the tills and filing taxes then that single point of failure is going to KILL you. "Do I understand correctly, that we still can file as ""Married filing   jointly"", just add Schedule C and Schedule SE for her? Yes. Business registration information letter she got once registered   mentions that her due date for filing tax return is January 31, 2016.   Does this prevent us from filing jointly (as far as I understand, I   can't file my income before that date)? IRS sends no such letters. IRS also doesn't require any registration. Be careful, you might be a victim to a phishing attack here. In any case, sole proprietor files a regular individual tax return with the regular April 15th deadline. Do I understand correctly that we do not qualify as ""Family   partnership"" (I do not participate in her business in any way other   than giving her money for initial tools/materials purchase)? Yes. Do I understand correctly that she did not have to do regular   estimated tax payments as business was not expected to generate income   this year? You're asking or saying? How would we know what she expected? In any case, you can use your withholding (adjust the W4) to compensate." Here's an answer copied from  https://www.quora.com/Why-is-the-second-quarter-of-estimated-quarterly-taxes-only-two-months Estimated taxes used to be paid based on a calendar quarter, but in   the 60's the Oct due date was moved back to Sept to pull the third   quarter cash receipts into the previous federal budget year which   begins on Oct 1 every year, allowing the federal government to begin   the year with a current influx of cash. That left an extra month that   had to be accounted for in the schedule somewhere.  Since individuals   and most businesses report taxes on a calendar year, the fourth   quarter needed to continue to end on Dec 31 which meant the Jan 15 due   date could not be changed, that left April and July 15 dues dates that   could change.  April 15 was already widely known as the tax deadline,   so the logical choice was the second quarter which had its due date   changed from July 15 to June 15. I few years ago my company in the Washington DC area allowed employees to contribute their own pre-tax funds. The system at the time wasn't sophisticated enough to prevent what you are suggesting. The money each month was put on a special credit card that could only be used at certain types of locations. You could load it onto the Metro smart trip card, and use it for many months. Many people did this, even though the IRS says you shouldn't. But eventually the program for the federal employees changed, their employer provided funds were put directly onto their Smart Trip card. In fact there were two buckets on the card: one to pay for commuting, and the other to pay for parking. There was no way to transfer money between buckets. The first day of the new month all the excess funds were automatically removed from the card;and the new funds were put onto the card. If your employer has a similar program it may work the same way. HR will know. It would be quite the trick for (a) the government to run all year and get all its revenue in April when taxes are due and (b) for people to actually save the right amount to be able to cut that check each year. W2 employers withhold the estimated federal and state taxes along with the payroll (social security) tax from each paycheck. Since the employer doesn't know how many kids you have, or how much mortgage interest, etc you will take deductions for, you can submit a W4 form to adjust withholdings.   The annual Form 1040 in April is to reconcile exact numbers, some people get a refund of some of what they paid in, others owe some money.  If one is self-employed, they are required to pay quarterly estimated taxes. And they, too, reconcile exact numbers in April. Years ago I mailed my personal tax return one day after the due date, and my check was deposited as normal, and I never heard anything about it. As an employer, I once sent in my employee's withheld federal taxes one day after the due date, and I later received a letter stating my penalty for being late worked out to be around $600. The letter stated that since this was my first time being late they would waive the fee. In both cases, they could have charged me a late fee if they wanted to. I do NOT know the full answer but I know here are some important factors that you need to consider : Do you have a physical location in the United States? Are you working directly from Canada? With a office/business location in the United States your tax obligation to the US is much higher. Most likely you will owe some to the state in which your business is located in Payroll Tax : your employer will likely want to look into Payroll tax, because in most states the payroll tax threshold is very low, they will need to file payroll tax on their full-time, part-time employees, as well as contractor soon as the total amount in a fiscal year exceeds the threshold Related to No.1 do you have a social security number and are you legally entitled to working in the States as an individual. You will be receiving the appropriate forms and tax withholding info Related to No.3 if you don't have that already, you may want to look into how to obtain permissions to conduct business within the United States. Technically, you are a one person consulting service provider. You may need to register with a particular state to obtain the permit. The agency will also be able to provide you with ample tax documentations.  Chances are you will really need to piece together multiple information from various sources to resolve this one as the situation is specific. To start, look into consulting service / contractor work permit and tax info for the state your client is located in. Work from state level up to kick start your research then research federal level, which can be more complex as it is technically international business service for Canada-US "If one looks at the ""Guide to Information Returns"" in the Form 1099 General Instructions (the instructions that the IRS provides to companies on how to fill out 1099 and other forms), it says that the 1099-B is due to recipient by February 15, with a footnote that says ""The due date is March 15 for reporting by trustees and middlemen of WHFITs."" I doubt that exception applies, though it may. There's also a section in the instructions on ""Extension of time to furnish statements to recipients"" which says that a company can apply to the IRS to get an extension to this deadline if needed. I'm guessing that if you were told that there were ""complications"" that they may have applied for and been given this extension, though that's just a guess. While you could try calling the IRS if you want (and in fact, their web site does suggest calling them if you don't receive a W-2 or 1099-R by the end of February), my honest opinion is that they won't do much until mid-March anyway. Unfortunately, you're probably out of luck being able to file as early as you want to." You pay it this tax year.  Whether that's now due to W-2 withholding, or later with your 1040 next year, or with your 1040-ES all depends on your particular situation.