Why are estimated taxes due “early” for the 2nd and 3rd quarters only?
There are too many nuances to the question asked to explore fully but here are a few points to keep in mind. If you are a cash-basis taxpayer (most individuals are), then you are not required to pay taxes on the money that has been billed but not received as yet.  If you operate on an accrual basis, then the income accrues to you the day you perform the service and not on the day you bill the client. You can make four equal payments of estimated tax on the due dates, and if these (together with any income tax withholding from wage-paying jobs) are at least 90% of your tax liability for that year, then you owe no penalties for underpayment of tax regardless of how your income varied over the year. If your income does vary considerably over the year (even for people who only have wages but who invest in mutual funds, the income can  vary quite a bit since mutual funds typically declare dividends and capital gains in December), then you can pay different amounts in each quarterly installment of estimated tax. This is called the annualization method (a part of Form 2210 that is best avoided unless you really need to use it).  Your annualized income for the payment due on June 15 is 2.4 = 12/5 times your taxable income through May 31. Thus, on Form 2210, you are allowed to assume that your average monthly taxable income  through May 31 will continue for the rest of the year. You then compute the tax due on that annualized income and you are supposed to have paid at least 45% of that amount by June 15. Similarly for September 15 for which you look at income through August 31, you use a multiplier of 1.5 = 12/8 and need to pay 67.5% of the tax on the annualized income, and so on.  If you miscalculate these numbers and pay too little tax in any installment, then you owe penalties for that quarter.  Most people find that guesstimating the tax due for the entire year and paying it in equal installments is simpler than keeping track of nuances of the annualized method. Even simpler is to pay 100% of last year's tax in four equal installments (110% for high earners) and then no penalty is due at all. If your business is really taking off and your income is going to be substantially higher in one year, then this 100%/110% of last year's tax deal could allow you to postpone a significant chunk of your tax bill till April 15. 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 suspect that the payments were originally due near the end of each quarter (March 15, June 15, September 15, and December 15) but then the December payment was extended to January 15 to allow for end-of-year totals to be calculated, and then the March payment was extended to April 15 to coincide with Income Tax Return filing.
Estimated tax payments should be a reasonable estimate of what you owe for that time period. If it seems reasonable to you, it is probably reasonable. Sure, you can adjust for varying-length periods. As long as, in the end, you can and do pay what you owe, and don't underpay the estimated/withholding by enough that you owe a penalty, the IRS isn't all that picky about how the money is actually distributed through the year. "The forms get updated every year, and the software providers need to get approved by the IRS every year. ""Form is not yet finalized"" means that this year form hasn't been approved yet. IRS starts accepting returns on January 31st anyway, nothing to be worried about. Why are you nearing a deadline? The deadline for 1120 (corporate tax return) is 2 and 1/2 months after your corp year end, which if you're a calendar year corp is March 15th. If your year end is in November/December - you can use the prior year forms, those are finalized." You must pay your taxes at the quarterly intervals. For most people the withholding done by their employer satisfies this requirement. However, if your income does not have any withholding (or sufficient), then you must file quarterly estimated tax payments.  Note that if you have a second job that does withhold, then you can adjust your W4 to request further withholding there and possibly reduce the need for estimated payments.  Estimated tax payments also come into play with large investment earnings. The amount that you need to prepay the IRS is impacted by the safe harbor rule, which I am sure others will provide the exact details on. "Everything is fine.  If line 77 from last year is empty, you should leave this question blank. You made estimated tax payments in 2015.  But line 77 relates to a different way to pay the IRS.  When you filed your 2014 taxes, if you were owed a refund, and you expected to owe the IRS money for 2015, line 77 lets you say ""Hey IRS, instead of sending me a refund for 2014, just keep the money and apply it to my 2015 taxes.""  You can also ask them to keep a specified amount and refund the rest.  Either way this is completely optional. It sounds like you didn't do that, so you don't fill in anything here.  The software should ask you in a different question about your estimated tax payments." They are four quarterly estimated tax payments.   The IRS requires that you pay your taxes throughout the year (withholding in a W-2 job).  You'll need to estimate how much taxes you think you might be owing and then pay roughly 1/4 at each of the 4 deadlines. From the IRS: How To Figure Estimated Tax To figure your estimated tax, you must   figure your expected AGI, taxable   income, taxes, deductions, and credits   for the year. When figuring your 2011 estimated tax,   it may be helpful to use your income,   deductions, and credits for 2010 as a   starting point. Use your 2010 federal   tax return as a guide. You can use   Form 1040-ES to figure your estimated   tax. Nonresident aliens use Form   1040-ES (NR) to figure estimated tax. You must make adjustments both for   changes in your own situation and for   recent changes in the tax law. For   2011, there are several changes in the   law. Some of these changes are   discussed under What's New for 2011   beginning on page 2. For information   about these and other changes in the   law, visit the IRS website at IRS.gov. The instructions for Form 1040-ES   include a worksheet to help you figure   your estimated tax. Keep the worksheet   for your records. You may find some value from hiring a CPA to help you setup your estimated tax payments and amounts. Ultimately, you are the one that is responsible for your tax filings and your payments (It's all linked to your SSN, after all). If this fee/interest is the result of a filing error, and you went through a preparing company which assumes liability for their own errors, then you should speak to them. They will likely correct this and pay the fees.  On the other hand, if this is the result of not making quarterly payments, then you are responsible for it. (Source: Comptroller of Maryland Site) If you [...] do not have Maryland income taxes withheld by an employer, you can make quarterly estimated tax payments as part of a pay-as-you-go plan. If your employer does withhold Maryland taxes from your pay, you may still be required to make quarterly estimated income tax payments if you develop a tax liability that exceeds the amount withheld by your employer by more than $500. From this watered-down public-facing resource, it seems like you'll get hit with fees for not making quarterly payments if your tax liability exceeds $500 beyond what is withheld (currently: $0). If you're getting the same total amount of money every year, then the main issue is psychological. I mean, you may find it easier to manage your money if you get it on one schedule rather than another. It's generally better to get money sooner rather than later. If you can deposit it into an account that pays interest or invest it between now and when you need it, then you'll come out ahead. But realistically, if we're talking about getting money a few days or a week or two sooner, that's not going to make much difference. If you get a paycheck just before the end of the year versus just after the end of the year, there will be tax implications. If the paycheck is delayed until January, then you don't have to pay taxes on it this year. Of course you'll have to pay the taxes next year, so that could be another case of sooner vs later. But it can also change your total taxes, because, in the US and I think many other countries, taxes are not a flat percentage, but the more you make, the higher the tax rate. So if you can move income to a year when you have less total income, that can lower your total taxes. But really, the main issue would be how it affects your budgeting. Others have discussed this so I won't repeat. Usually you want two consecutive quarters before declaring a recession.   This blog doesn't reference any seasonal adjustment; a one or two month decline may be to any number of reasons. E.g. labor numbers dropped this month largely attributed to weather. I only see screen shots of excel sheets, I'm not willing to invest any time into parsing that out :( "From the IRS page on Estimated Taxes (emphasis added): Taxes must be paid as you earn or receive income during the year, either through withholding or estimated tax payments. If the amount of income tax withheld from your salary or pension is not enough, or if you receive income such as interest, dividends, alimony, self-employment income, capital gains, prizes and awards, you may have to make estimated tax payments. If you are in business for yourself, you generally need to make estimated tax payments. Estimated tax is used to pay not only income tax, but other taxes such as self-employment tax and alternative minimum tax. I think that is crystal clear that you're paying income tax as well as self-employment tax. To expand a bit, you seem to be confusing self-employment tax and estimated tax, which are not only two different things, but two different kinds of things.  One is a tax, and the other is just a means of paying your taxes. ""Self-employment tax"" refers to the Social Security and Medicare taxes that you must pay on your self-employment income.  This is an actual tax that you owe.  If you receive a W-2, half of it is ""invisibly"" paid by your employer, and half of it is paid by you in the form of visible deductions on your pay stub.  If you're self-employed, you have to pay all of it explicitly. ""Estimated tax"" does not refer to any actual tax levied on anyone.  A more pedantically correct phrasing would be ""estimated tax payment"".  Estimated taxes are just payments that you make to the IRS to pay tax you expect to owe.  Whether you have to make such payments depends on how much tax you owe and whether you've paid it by other means.  You may need to pay estimated tax even if you're not self-employed, although this would be unusual.  (It could happen, for instance, if you realized large capital gains over the year.)  You also may be self-employed but not need to pay estimated tax (if, for instance, you also have a W-2 job and you reduce your withholding allowances to have extra tax withheld). That said, if you earn significant income from self-employment, you'll likely have to make estimated tax payments.  These are prepayments of the income tax and Social Security/Medicare taxes you accrue based on your self-employment income. As Pete B. mentioned in his answer, a possible reason that your estiamtes are low is because some taxes have already been withheld from the paychecks you received so far during the year (while you were an employee).  These represent tax payments you've already made; you don't need to pay that money a second time, but you may need to make estimated tax payments for your income going forward." "You don't actually have to make four equal payments on US federal taxes; you can pay different amounts each quarter.  To avoid penalties, you must have paid ""enough"" at the end of each quarter.  If you pay too much in an early quarter, the surplus counts towards the amount due in later quarters.  If you have paid too little as of the end of a quarter, that deficit counts against you for interest and penalties until it is made up in later quarters (or at year-end settlement). How much is ""enough""?  There are a number of ways of figuring it.  You can see the list of exceptions to the penalty in the IRS documentation.  Using unequal payments may require more complicated calculation methods to avoid or reduce penalties at year-end.  If you have the stomach for it, you may want to study the Annualized Income Installment Method to see how uneven income might affect the penalty." Either make your best guess, or set it low and then file quarterly Estimated Tax payments to fill in what's missing, or set it high and plan on getting a refund, or adjust it repeatedly through the year, or... "The short answer is - ""Your employer should typically deduct enough every paycheck so you don't owe anything on April 15th, and no more."" The long answer is ""Your employer may make an error in how much to deduct, particularly if you have more than 1 job, or have any special deductions/income. Calculate your estimated total taxes for the year by estimating all your income and deductions on a paper copy of a tax return [I say paper copy so that you become familiar with what the income and deductions actually are, whereas plugging into an online spreadsheet makes you blind to what's actually going on]. Compare that with what your employer deducts every paycheck, * the number of paychecks in the year. This tells you how much extra you will pay / be refunded on April 15th, as accurately as you can estimate your income and deductions.""" "It's not quite as bad as the comments indicate. Form 1040ES has been available since January (and IME has been similarly for all past years). It mostly uses the prior year (currently 2016) as the basis, but it does have the updated (2017) figures for items that are automatically adjusted for inflation: bracket points (and thus filing threshhold), standard deductions, Social Security cap, and maybe another one or two I missed.  The forms making up the actual return cannot be prepared very far in advance because, as commented, Congress frequently makes changes to tax law well after the year begins, and in some cases right up to Dec. 31. The IRS must start preparing forms and pubs -- and equally important, setting the specifications for software providers like Intuit (TurboTax) and H&RBlock -- several months ahead in order to not seriously delay filing season, and with it refunds, which nearly everyone in the country considers (at least publicly) to be worse than World War Three and the destruction of the Earth by rogue asteroids. I have 1040 series from the last 4 years still on my computer, and the download dates mostly range from late September to mid January. Although one outlier shows the range of possibility: 2013 form 1040 and Schedule A were tweaked in April 2014 because Congress passed a law allowing charitable contributions for Typhoon Haiyan to be deducted in the prior year. Substantive, but relatively minor, changes happen every year, including many that keep recurring like the special (pre-AGI) teacher supplies deduction (""will they or won't they?""), section 179 expensing (changes slightly almost every year), and formerly the IRA-direct-to-charity option (finally made permanent last year).  As commented, the current Congress and President were elected on a platform with tax reform as an important element, and they are talking even more intensely than before about doing it, although whether they will actually do anything this year is still uncertain. However, if major reform is done it will almost certainly apply to future years only, and likely only start after a lag of some months to a year. They know it causes chaos for businesses and households alike to upend without advance warning the assumptions built in to current budgets and plans -- and IME as a political matter something that is enacted now and effective fairly soon but not now is just as good (but I think that part is offtopic)." If you have non-salary income, you might be required to file 1040ES estimated tax for the next year on a quarterly basis. You can instead pay some or all in advance from your previous year's refund. In theory, you lose the interest you might have made by holding that money for a few months. In practice it might be worth it to avoid needing to send forms and checks every quarter. For instance if you had a $1000 estimated tax requirement and the alternative was to get 1% taxable savings account interest for six months, you'd make about $3 from holding it for the year. I would choose to just pay in advance. If you had a very large estimation, or you could pay off a high-rate debt and get a different effective rate of return, the tradeoff may be different. There actually are legitimate reasons, but they don't apply to most people.  Here are a few that I know of: You're self-employed and have to pay quarterly estimated taxes.  Rather than wait for the refund when you already have to pay 1/4 of next year's taxes at the same time, you just have the IRS apply to refund forward.  (so you're not out the money you owe while waiting for your refund). You're filing an amended or late return, and so you're already into the next year, and have a similar situation as #1, where your next year's taxes have already come due. You're planning on declaring bankruptcy, and you're under the Tenth Circuit, those credits might be safe from creditors For almost any other situation, you're better off taking the money, and using it to pay down debt, or put it somewhere to make interest (although, at the current rates, that might not be very much).