Debit and credit does not automatically mean: "plus" and "minus", "good" and "bad" or "increasing" and "decreasing".
Debit represents the addition of an asset or expense or the reduction to a liability or revenue.
- Assets
- Liabilities
- Shareholders (aka Owners) Equity
- Revenue
- Expenses
A debit (DR) isn't always increasing. A credit (CR) isn't always decreasing. Don't think of it in these terms, but rather in the context of the five categories above.
Debits will always increase for Assets and Expenses. Credits have the opposite effect.
Credits will always increase for Liabilities, Shareholders' Equity and Revenue. Debits will have the opposite effect.
- You could classify an account as either real, personal, or nominal.
- Real accounts represent your assets like cash, land, machinery, etc.
- Personal accounts represent persons (individuals, corporations, etc.) like suppliers, customers, bankers, borrowers, etc.
- Nominal accounts represent incomes and expenses like rent, salary, interest, etc.
When you have to deal with a transaction, think of the accounts that it will involve. Once you have identified which accounts will be involved, you classify them as above.
- Real accounts: Debit what comes in, credit what goes out
- Personal accounts: Debit the receiver, credit the giver
- Nominal accounts: Debit all expenses and losses, credit all incomes and gains.