When to Pay Your Business's Estimated Taxes
You need to pay your business's estimated taxes on specific dates every year. If your business is anything but a corporation, the estimated tax due dates are April 15, June 15, September 15, and January 15. Corporate estimated taxes are due on the fifteenth day of the 4th, 6th, 9th, and 12th month after the end of the company’s fiscal year.
Keep in mind that these are due dates, not postmark dates, so plan to send tax payments several days in advance.
The rules for paying estimated taxes are different for the different forms of business. Here’s a brief summary:
Sole proprietors, partners, and S corporation shareholders: If you expect to owe taxes of $1,000 or more when you file your income tax return, you probably need to make estimated payments to the federal government. Use Form 1040-ES — Estimated Tax for Individuals — to determine how much to pay and when to submit your payment.
Corporations: If you expect to owe taxes of $500 or more when you file your tax return, you probably need to make estimated payments to the federal government. Use Form 1120-W — Estimated Tax for Corporations — to determine how much to pay.
Of course, the day of reckoning for most small businesses (if they aren't corporations) comes each year on the same day as it does for individual taxpayers: April 15. (Corporations have a slightly different arrangement; corporate federal tax returns are due on the fifteenth day of the third month after the close of the company’s fiscal year, or March 15 for a fiscal year that ends on December 31.) On this day, you submit your tax return for the preceding calendar year and write out one more check to pay the IRS for tax shortfalls that your estimated payments didn't cover.

Accounting Glossary
accounting equation
The equation Assets = Liabilities + Equity, which demonstrates the two-sided nature of accounting and is useful for explaining the concept of double-entry accounting (or double-entry bookkeeping).

Accounting Glossary
accounting period
The time period for which financial information is being tracked in a business, such as monthly, quarterly, or annually.

Accounting Glossary
accounts receivable
An account that records the amounts that customers owe to a business.

Accounting Glossary
adjusting entry
A correction made to a bookkeeping account that adjusts for accounting errors or other necessary changes at the end of the accounting period.

Accounting Glossary
cash flows
Used to describe the source or sources of cash or how cash is used.

Accounting Glossary
Chart of Accounts
A list of all the accounts used by a business, including what types of transactions go into each account.

Accounting Glossary
debit
An accounting entry that increases an asset or expense account, and decreases a liability or income account.

Accounting Glossary
dividends
A portion of a company’s profits paid by share of common stock on a quarterly or annual basis.

Accounting Glossary
FASB
Financial Accounting Standards Board. FASB is the highest-ranking authority in the private (non-government) sector of the U.S. for making pronouncements on GAAP and for keeping accounting standards up-to-date.

Accounting Glossary
Federal Unemployment Tax
In the U.S., the fund that used to be known simply as Unemployment. Employers contribute to the fund, and states also collect taxes to fill their unemployment fund reserves. (The acronym FUTA means Federal Unemployment Tax Act.)

Accounting Glossary
fidelity bonds
A type of insurance — typically carried by employers for their employees — that helps guard against theft and reduce the risk of loss.

Accounting Glossary
FIFO
First-in, first-out. A method for costs of goods sold in which a business charges out product costs to cost of goods sold expense in the chronological order in which the goods were acquired.

Accounting Glossary
fungible
Describes a product that is interchangeable and virtually indistinguishable from another product.

Accounting Glossary
General Ledger
A summary of all of a business’s accounts and transactions.

Accounting Glossary
IASB
International Accounting Standards Board. The IASB (based in London) is the main authoritative accounting standards setter outside the U.S.

Accounting Glossary
Journals
The location in which bookkeepers keep records (in chronological order) of daily company transactions.

Accounting Glossary
LIFO
Last-in, first-out. A method for costs of goods sold that selects the last item you purchased first, and then works backward until you have the total cost for the total number of units sold during the period.

Accounting Glossary
LLP
Limited liability partnership. A legal structure that state laws offer to qualified professionals in which all the partners have limited liability.

Accounting Glossary
PC
Professional corporation. A legal structure that state laws offer to qualified professionals who otherwise would have to operate as an unlimited partnership liability.

Accounting Glossary
petty cash
A cash account that businesses keep on hand for unexpected expenses.

Accounting Glossary
revenue
Monies that are collected in the process of selling a company’s goods and services.

Accounting Glossary
salvage value
The amount that an asset is worth after it has been fully depreciated.

Accounting Glossary
statement of cash flows
A financial statement that summarizes a business’s cash inflows and outflows during an accounting period.

Accounting Glossary
transactions
Economic exchanges between a business or other entity and the parties with which the entity interacts and makes deals.

Accounting Glossary
worker’s compensation insurance
A type of insurance carried by employers that covers its employees in case they are injured on the job.