If you run a company, then you aren’t going to be able to avoid book­keep­ing. Com­mer­cial ac­count­ing is an essential part of the ac­count­ing system and required is for all reg­is­tered traders. After all, apart from the tax de­c­la­ra­tion, the revenue de­part­ment still needs your annual balance sheet to determine the amount of type of your taxation. It’s also in your own interest as a business to keep your input and ex­pen­di­ture records in order to be able to determine your profits in the annual financial state­ments. You can only plan future projects over the next year, or several years, if you have an accurate overview of the numbers.

Double-entry ac­count­ing (also referred to as double-entry book­keep­ing) makes it possible for you to keep your business processes man­age­able. But from when and for whom is double-entry ac­count­ing rec­om­mend­ed? And how exactly do the in­di­vid­ual invoice processes work? Double-entry ac­count­ing really isn’t as com­pli­cat­ed as it looks at first glance. This guide will explain the basics of double-entry book­keep­ing step by step, as well as point out exactly what you should pay attention to.

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De­f­i­n­i­tion: What is double-entry ac­count­ing?

Double-entry ac­count­ing refers to the system of com­mer­cial book­keep­ing where all of a company’s business trans­ac­tions are sys­tem­at­i­cal­ly listed. The annual account balance, or in other words, the con­sol­i­da­tion of all business trans­ac­tions within one fiscal year, has to be filed with the IRS at the end of the tax year. These annual report state­ments include a balance sheet as well as a profit and loss account (P&L). Using these, you can take your balance sheet at the end of the year and see how much revenue your company has earned you, taking into account all costs accrued and revenues generated.

Double-entry ac­count­ing, in the technical sense, is also un­der­stood twice: business trans­ac­tions are booked to at least two accounts, that is to say, an account and a counter-account.

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Fact

Double-entry book­keep­ing is par­tic­u­lar­ly suited to large cor­po­ra­tions that have to enter a huge range of costs and revenues. Simple ac­count­ing, on the other hand, records the revenue and ex­pen­di­ture of a company in a single com­par­i­son, or a so-called net revenue. There are no legal re­quire­ments detailing when a company must use either method in the U.S., though double-entry is rec­om­mend­ed for larger busi­ness­es.

How does double-entry ac­count­ing work?

Anyone who deals with numbers can clearly see the benefit here. With double-entry ac­count­ing, two ac­count­ing methods must be present. The balance sheet is the basis for the profit and loss account (P&L).

Tip

Make sure that you have your books in order and fully filled out in a timely manner. You need to enter all business trans­ac­tions, aka all revenue and ex­pen­di­tures of your company. A small error along the way can make it so that your numbers don’t add up in the end.

The balance sheet is the foun­da­tion of the double-entry system. This works with real accounts - that means that you record the current financial state of your company according to various plans, at both the beginning and the end of each fiscal year. These can later be merged and compared with one another. This way, you can keep track of where, when, and what you spend your money on, as well as where your money comes from.

1. Basics: The division of assets and li­a­bil­i­ties

The balance is divided into assets and li­a­bil­i­ties. The assets describe all business trans­ac­tions that comprise what you spend your money on, e.g., for fixed assets (technical equipment, machinery, etc.), in­ven­to­ries (raw materials and supplies), se­cu­ri­ties, etc. The li­a­bil­i­ties, on the other hand, have to do with all trans­ac­tions con­cern­ing the origin of your assets, i.e., where your money comes from - such as from capital, loans, profits, etc. The com­par­i­son helps you keep track of the areas in which your money is spent and gained.

A detailed overview of the in­di­vid­ual asset uti­liza­tion and revenue can be found in the following graph (Table 1):

Fact

On LII you can find a full breakdown of all balance sheet re­quire­ments for the U.S. and which persons they apply to.

2. Fun­da­men­tals: The division of debit and credit

Once you have an overview of the in­di­vid­ual areas, you can look at the in­di­vid­ual inventory accounts. These are divided into a debit side (left) and a credit side (right). The ins and outs, or inflows and outflows of payments, are recorded in the cor­re­spond­ing areas.

Important note for the invoice: For inventory accounts on the assets side (see table 1), the payment inflows are posted in the debit and payment outflows are in the credit. On the li­a­bil­i­ties side, it works the opposite way: Account balances are reduced in the debit and increased in the credit. This is the basic principle of double-entry book­keep­ing.

There must always be a balance between the assets and li­a­bil­i­ties: each trans­ac­tion needs to be debited in one account and credited in the other. At the end of the day, it’s important that the total balance sheet has the same value on both sides. With this list, you can then determine the exact initial stock, final stock, and profit that your company had in a certain period.

Fact

The debit side is always on the left, and the credit side is always on the right.

3. Example of double-entry ac­count­ing: The balance sheet

Account balancing takes place within in­di­vid­ual inventory accounts (or so-called T-accounts). The results are then trans­ferred to the overall balance (ALM table). This provides you with a detailed list of all trans­ac­tions as well as the total revenue and expenses of your company.

Now apply the basic prin­ci­ples from above. The cal­cu­la­tion of in­di­vid­ual inventory account is carried out within the T-accounts, which you build according to the following pattern:

Depending on whether the relevant account is on the asset side or the liability side of the balance sheet, you’ll apply the cor­re­spond­ing basic rules for the cal­cu­la­tion.

  • Inventory accounts on the assets side (e.g., Fixed Assets): Payment inflows are listed in the debit, outflows are listed in the credit.
  • Inventory accounts on the li­a­bil­i­ties side (e.g., Capital): Payment inflows are listed in the credit, outflows are listed in the debit.
  • The balance sheet must have the same value on both sides.

The following video shows in detail how the cal­cu­la­tion process looks, and how the results are then listed in the overall balance sheet:

Profit and loss report (P&L)

The profit and loss report (P&L) is part of the balance sheet that you can use to determine your company’s success over a certain time span. The revenue and expenses are compared here: if the revenue outweighs the expenses, you make a profit. But if the expenses are pre­dom­i­nant, then you record a loss.

The cal­cu­la­tion process works similarly to the balance sheet cal­cu­la­tion. The only dif­fer­ence: the P&L doesn’t work with inventory accounts, but with expense and revenue accounts. These are divided between the debit side (left) and the credit side (right), re­spec­tive­ly. Then the results of the in­di­vid­ual accounts are trans­ferred to the P&L report.

Example of a P&L report

The following graphic (Table 2) shows how to group your P&L report according to the in­di­vid­ual expense and revenue accounts:

The profit and loss report is based on the same pattern as the balance sheet. The results are entered in the in­di­vid­ual expense and revenue accounts (T-accounts) in the P&L account. To make sure you don’t lose track, you should lose the following template:

Example of a P&L report:

In this example, you can see the total costs (debit) on the left, divided according to in­di­vid­ual cost types, and the revenue (credit) on the right. The credit side denotes your assets (plus-value). Add all of the values together to get a sum of $108,000. The debit side shows your use of assets (minus-value). If you deduct the de­ter­mined debit amount of $90,000 from the credit value it shows your profit of $18,000.

Fact

The P&L account is es­sen­tial­ly the equity account, and so is on the li­a­bil­i­ties side. With P&L accounts, make sure that you post the revenue in the credit and the expenses in the debit. At the end of the year, the values de­ter­mined by the P&L account are trans­ferred to the equity account.

Another visual example is given in this video:

Tip

There are, of course, a number of other ways for per­fect­ing your ac­count­ing methods. To save yourself time so you’re not spending your entire day computing, there are special tools that will do it for you. Above all, large companies with cor­re­spond­ing­ly large revenue and expense amounts can use these tools to make their daily work easier.

Click here for important legal dis­claimers.

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