Tax Basics for Startups

Per Diem Rates from the U.S. General Services Administration

Search by city, state or ZIP code, or by clicking on the map. You can also use the new per diem tool to calculate trip allowances

Rates are set by fiscal year, effective October 1 each year. Find current rates in the continental United States ("CONUS Rates").

Reporting Income for a Retail Business


Reporting income for a retail business is a bit more involved than for a service business.

For a service business, you simply determine gross receipts then subtract business expenses from gross receipts to arrive at net income.

However, since a retail business carries inventory, an additional element of complexity is added that a service business does not have to deal with.

The following steps are typically performed to arrive at net income or loss for a retail business.
  1. Determine gross sales
  2. Subtract sales returns and allowances (if any) from gross sales to arrive at net sales
  3. Subtract cost of goods sold from net sales to arrive at gross profit
  4. Subtract operating expenses (and all other expenses) from gross profit to arrive at net income or loss

Cost of Goods Sold for a Retail Business

A retail business purchases items for resale. To make a profit, the cost of all items purchased must be marked up to arrive at a selling price. The selling price of all items sold for the year must be sufficient enough to cover costs and produce a profit.

For example, if unit A is purchased for $10 and marked up 50%, the selling price would be $15 $10 plus (50% x $10). When unit A is sold for the $15, the $15 is called Gross Sales. Of the $15, $10 represents the cost of goods sold.

Cost of goods sold if figured as follows:
  • Beginning Inventory, plus
  • Net Purchases (purchases minus purchase returns), equals
  • Cost of Goods Available for Sale, minus
  • Ending Inventory, equals
  • Cost of Goods Sold
Beginning inventory:

Beginning inventory cost should match the ending inventory cost of the prior year. If your business is less than one year old, then your beginning inventory is zero.

Net purchases equals:
  • The total invoice cost for all items purchased, including shipping costs, installation costs, taxes, etc., minus
  • Purchase discounts and purchase returns
Cost of goods available for sale:

This is the beginning inventory plus net purchases for the year.

Ending inventory:

This is generally determined by taking a physical count of goods on hand at the end of the year. Each item on hand is assigned a value in order to determine the dollar amount of the inventory on hand. Various cost methods are used to assign a value units of inventory, such as FIFO, LIFO and Average Cost.

Avoid costly penalties!

Use the IRS Online Tax Calendar
to check filing and deposit deadlines.