Bookkeeping
Bookkeeping is the process of recording transactions in a systematic way.
For convenience, in the notes "you" refers to "the company"
Identifying transactions
There are 6 types of accounts:
- Asset - Stuff you own
- Liability - Stuff you owe 3rd parties
- Equity (Stockholders' Equity) - Stuff for owners
- Revenue - Money you earn from selling stuff
- Expense - Costs of doing business
- Dividend - Money given to owners
R,E,D all feed into Equity. This will be further explored in Financial Statements.
- Current A&L - Due within 1 year
- Non-current A&L - Stuff that stays with you for more than 1 year
- Operating - Central focus of business
- Non-operating - Not related to the main business
Contra accounts are accounts that have a normal balance opposite to the account type. The following is how we present them in a financial statement:
Account | Debit | Credit |
---|---|---|
Accounts receivable | 10 | |
Allowance for doubtful accounts | 1 |
Categorizing transactions
A | L | |
---|---|---|
C | Cash | Accounts Payable |
Short-Term Investments | Accrued Expenses Payable | |
Accounts Receivable | Notes Payable | |
Notes Receivable | Taxes Payable | |
Inventory (to be sold) | Unearned Revenue | |
Supplies | Bonds Payable (short-term) | |
Prepaid Expenses | Short term debts | |
Dividends payable | ||
NC | Long-Term Investments | Bonds Payable (long-term) |
Equipment | Long term debts | |
Buildings | ||
Land | ||
Intangibles | ||
Keywords | prepaid expense, accrued revenue | payable, prepaid revenue, accrued expenses |
Equity |
---|
Common Stock (CS) |
Retained Earnings (RE) |
Additional Paid-in Capital |
Treasury Stock |
Learn more about Stockholder's Equity.
Revenue | Expenses | |
---|---|---|
O | Sales Revenue | Cost of Goods Sold (COGS) |
Service Revenue | Depreciation expense | |
Wages expense | ||
Rent expense | ||
Insurance expense | ||
Repairs expense | ||
NO | Interest Revenue | Interest Expense |
Dividend Revenue | Tax Expense | |
Gain on Sale of Assets | ||
Tax Revenue |
The most liquid assets that can be quickly converted to cash. We usually group these into a single cash account.
The money you own / owe with an interest rate.
Example 1: You borrowed $1000 from a bank. (Payable)
Preparing journal entries
This equation is based on the principle that Stuff that you OWN = Stuff that you OWE.
From money to go to one account (source), it must come from another (destination). This is the duality of every transaction in accounting.
Debit (Dr) is the term to describe the destination of money flow, whereas Credit (Cr) is the term to describe the source of money flow.
We can categorize transactions as debits or credits by their accounts' type:
Dr - CrDEA LERDividend, Expense, Asset - Liability, Equity, RevenueThey would be a Dr / Cr if their value was positive. Otherwise, they would be the other way around.
This is based on rearranging the accounting equation and expanding its terms.
A record of a transaction in the journal during the accounting period. The following is the format:
- Date
- Account
- Description
Amounts credited are usually indented.
Date | Account | Debit | Credit |
---|---|---|---|
Jan 1, 2023 | Cash | 1 | |
Common Stock | 1 | ||
To record the issuance of common stock for cash |
Posting to general ledger
T-account is a way to visualize an account. Dr goes on the left, Cr goes on the right. The closing balance is displayed on the corresponding side.

A general ledger is a collection / database of accounts that store all transactions for you. Each account has their own general ledger.
Cash | ||||
---|---|---|---|---|
Date | Description | Debit | Credit | Balance |
Jan 1 | Issuance of stock | $1,000 | $1,000 | |
Ending Balance | $1,000 |
Common Stock | ||||
---|---|---|---|---|
Date | Description | Debit | Credit | Balance |
Jan 1 | Issuance of stock | $1,000 | $1,000 | |
Ending Balance | $1,000 |
Reporting and intepreting Stockholder's Equity
Corporate businesses has an advantage over proprietorships of the ease of participation in ownership. This is done through the issuance of common stock. Owners of common stock are known as stockholders / shareholders.
Dividends are the money paid to the shareholders from the company's profits, when the company decides to distribute them.
Benefits of stock ownership
Stockholders have the following benefits:
- Voice in management
- Dividends
- Claim of assets upon liquidation of company
Authorized, issue and outstanding shares
The following are the categorization of stocks:
- Authorized - Max. number that can be sold
- Issued - Sold to the public
- Common stock- Currently held by the public (Outstanding stock)
- Treasury stock- Bought back by the company from the public
- Preferred stock
- Unissued - Never been sold
- Issued - Sold to the public
The shares bought back by the company from the public. This is a contra-equity account, as can be thought of as being opposite to common stock.
- Par value - The minimum price of the stock
- Market value - The price of the stock in the market
A special category of stocks. They have a fixed dividend rate which is paid before common stockholders. However, they do not have voting rights.
The preferred stock holders offers two dividend options:
- Current - Paid in the current period, limits to before common stockholders
- Cummulative - Paid in the future if not paid in the current period. This amount is called dividends in arrears.
Preferred stock has a fixed dividend rate, which is given by:
They have a separate par value from common stock.
As their dividends are paid first:
"Preferred stock: $20 par value, 1% rate, 1000 shares. Common stock: $10 par value, 5000 shares." PD =
Consider a issurance of $3000 dividends, for current preference:
,
Consider a issurance of $10000 dividends, for cummulative preference, dividends in arrears for 2 years:
(first 2000 is the current year's),
Reporting stockholder's equity
When a stock is sold. Other than recording the stock issurance, we also need to record the
Common Stock = Stock Issurance = Number of shares Par value
APC = Value - Stock Issurance
"Issued 200m additional shares of $0.01 par value for $16m" APC = 14m, CS = 2m
Example entry:
Account | Debit | Credit |
---|---|---|
Cash | 16 | |
Common Stock | 2 | |
Additional Paid-in Capital | 14 |
When we declare a dividend, we allocate money to the owners from retained earnings.
"Declared dividends of $2m"
Example entry:
Account | Debit | Credit |
---|---|---|
Retained earnings | 2 | |
Dividends payable | 2 |
When we reissure stock, we need to credit treasury stock instead of common stock, as we pull from our own stock. We also need to record the additional paid-in capital when we sell the stock for more than its par value.
"Reacquired 10 shares of common stock when selling for $14 per share." Treasury = 140
Example entry:
Account | Debit | Credit |
---|---|---|
Treasury stock | 140 | |
Cash | 140 |
"Reissued 1 shares of treasury stock at $13 per share" APC = -1 (less than par value), Treasury = 14
Example entry:
Account | Debit | Credit |
---|---|---|
Cash | 13 | |
Additional paid-in capital | 1 | |
Treasury stock | 14 |
These concepts make up the statement of stockholder's equity.
Reporting inventories & COGS
The goods that you have for sale as a retailer, or the raw materials that you have for sale as a manufacturer.
As a retailer, you purchase the goods to sell as inventory from a supplier, and make a sale to a customer. We need to record this purchase, sale, COGS and the change in inventory.
There are two ways we can record COGS and inventory in an according period:
- As the goods are sold / purchased (Perpetual)
- Updates accounts in real-time
- More complex, more costly
- At the end of the period (Periodic)
- Does not update accounts in real-time
- Less complex, less costly
Perpetual System:
When we restock our inventory:
Date | Account | Debit | Credit |
---|---|---|---|
Jan 1, 2023 | Inventory | 1 | |
Cash | 1 |
When we make a sale:
Date | Account | Debit | Credit |
---|---|---|---|
Jan 2, 2023 | Cash | 2 | |
Sales Revenue | 2 | ||
To record the sale of goods | |||
Jan 2, 2023 | Cost of Goods Sold | 1 | |
Inventory | 1 | ||
Update real-time |
Periodic System:
When we restock our inventory:
Date | Account | Debit | Credit |
---|---|---|---|
Jan 1, 2023 | Purchases | 1 | |
Cash | 1 |
When we make a sale:
Date | Account | Debit | Credit |
---|---|---|---|
Jan 2, 2023 | Cash | 2 | |
Sales Revenue | 2 | ||
To record the sale of goods |
At the end of the period:
Date | Account | Debit | Credit |
---|---|---|---|
Dec 31, 2023 | Inventory | 1 | |
Purchases | 1 | ||
Update inventory restock first | |||
Dec 31, 2023 | Cost of Goods Sold | 1 | |
Inventory | 1 | ||
Update COGS after |
The difference between the COGS and the revenue will reflect the profit accordingly when we produce the income statement.
The above example assumes that the
Reflects the changes in inventory during an accounting period, with the total cost of good sold depending on cost flow assumptions.
During the period, the following transactions occurred:
- 1/1: First purchase of goods 100 units at $1 each
- 1/2: Restocked 200 units by $400
- 1/3: Sold 150 units for $450
Date | Action | Quantity | Unit cost | Total cost |
---|---|---|---|---|
Jan 1, 2023 | Opening | 100 | $1 | $100 |
Jan 2, 2023 | Purchase | 200 | $2 | $400 |
Goods available for sale | 300 | / | $500 | |
Jan 3, 2023 | Sale | (150) | / | ( ? ) COGS |
Ending inventory | 150 | / | $500 - ? |
To determine the COGS when we purchased the goods at different costs, we can use the following assumptions:
- FIFO - First In, First Out
- LIFO - Last In, First Out
- AVCO - Average cost of all units (Total cost / Available units)
- Specific Identification - Ratio / quantity specified They are assumptions because we do not know which physical units were sold.
- ?
- ?
- ?
We must take into account for the rise / drop in inventory prices during the period when considering which assumption is better.
In a period of rising prices:
- FIFO - Higher net income (less COGS expenses)
- LIFO - Lower net income (more COGS expenses) Note: Accounting rules require companies to apply their accounting methods on a consistent basis over time. (Can't change frequently)
Net realizable value of inventory
We need to report inventory at its minimum of the cost or NRV. This is to prevent overstating the value of inventory.
If , the company would make a “write-down” entry of to reduce the inventory balance to NRV. (As they are originally recorded at cost).
Example: The company has 1000 units of inventory at $10 each. The NRV is $8.
The valuation used at the end of this period would be . As , we need to make the following entry:
Account | Debit | Credit |
---|---|---|
COGS | 2000 | |
Inventory | 2000 |
Reporting equipments
We include the following acquisition costs in the value of an equipment upon acquisition:
- Purchase price
- Sales taxes
- Legal fees
- Transportation costs
- Installation and preparation costs The act of inclusion is also called capitalization.
Example: Soutwest Airlines purchased aircraft of $20, and paid $1 for transportation and $2 for installation.
Account | Debit | Credit |
---|---|---|
Equipment | 23 | |
Cash | 23 |
- Maintenance - Expense
- Improvements - Capitalized Some identifying characteristics of improvements are large sums of money, longer useful life, and increased efficiency.
- Record depreciation expense of the item for this period
- Calculate and write-off accumulated depreciation for this item
- Record the disposal of the asset by crediting it
- Record "gain on sale of assets" (revenue) or "loss on sale of assets" (expense) by balancing the entry
Example: Southwest Airlines sold flight equipment for $11 cash at the end of its 17th year of use. The flight equipment originally cost $30 and was depreciated using the straight-line method with zero residual value and a useful life of 25 years.
Date | Account | Debit | Credit |
---|---|---|---|
1. | Depreciation expense | 1.2 | |
Accumulated depreciation | 1.2 | ||
Depreciation expense for the period | |||
2. | Cash | 11 | |
Accumulated depreciation | 20.4 | ||
Equipment | 30 | ||
Gain on sale of assets | 1.4 | ||
Sale of equipment |
If we change the estimates of the useful life or residual value of an asset, we need to recalculate the net book value of the asset.
Example: Southwest Airlines spent $200 improving the flight equipment of $1000, changing the useful life of the flight equipment from 25 years to 30 years, with 0 residual value. It was in service for 2 years. Find the new net book value and calculate depreciation for this period.
Computation for change in estimates:
- Original cost: $1000
- Less: Accumulated depreciation: $
- Improvement capitalized cost: $200
- New cost: $1120
Depreciation expense: $
Reporting taxes
The tax that you pay on your income. It is calculated as a percentage of your income. We usually record it as tax payable until we actually pay the tax.
Example: Southwest Airlines has a tax rate of 30%. They earned $1000 in revenue. Record the tax expense.
Account | Debit | Credit |
---|---|---|
Income tax expense | 300 | |
Income tax payable | 300 |