I still remember my first accounting class. It was the fall of 2019, right before everything went online due to COVID. Like most first-term students, I was used to thinking of debits as decreases and credits as increases. That is how banks usually present it on your accounts, after all. But it turns out that debits and credits are a bit more complicated than that. Some account categories increase with debits and decrease with credits, while others are the reverse. It's enough to leave a first-term student pulling their hair out in frustration.
The DEALER Acronym
In my initial push to understand and get a grasp on the rules of debits and credits, I discovered the DEALER acronym:
Dividends, Expenses, Assets, Liabilities, Equity, Revenue

The first three account types are normal debit accounts. These are increased by debits and decreased by credits.
- D- Dividends (or Draws)
- E- Expenses
- A- Assets
The next three account types are normal credit accounts. These are increased by credits and decreased by debits.
- L- Liabilities
- E- Equity
- R- Revenue
But this still left me with the question, "Why does it work that way?" With some accounting issues, "because XYZ authority says so" is a perfectly valid explanation. GAAP and taxes, for instance. But not here. This is mostly a math issue.
The Accounting Equation
Eventually I came across the accounting equation. Like most students, I first learned it as:
Assets = Liabilities + Equity
This is a good start, but the equation can be fleshed out a bit more. Since revenues increase equity while expenses and dividends decrease equity, we can expand the equation to show those relationships explicitly:
Assets = Liabilities + Equity + Revenue - Expenses - Dividends
With a basic understanding of what those accounts are, this seems pretty logical, right? But we are going to rearrange this equation so that there are no subtraction symbols. To do this, we will add Expenses and Dividends to both sides, cancelling out the negative on the right and moving them to the left.
Dividends + Expenses + Assets = Liabilities + Equity + Revenue
And there we have the DEALER acronym again. Accounts to the left of the equals sign are normal debit accounts and accounts to the right are normal credit accounts. The accounting equation is just that--an equation. As such, it must always be kept equal. An increase to one account must always be balanced by either an increase to an account on the opposite side of the equation or a decrease to another account on the same side. This is the basis for double-entry bookkeeping. This is how T-accounts work.
Final Thoughts
Mnemonics like DEALER are useful—they help you remember the rules. But understanding where those rules come from makes them much harder to forget. Once I saw how the accounting equation and double-entry bookkeeping fit together, debits and credits stopped feeling like six unrelated rules to memorize and started feeling like one logical system. With that understanding, I was able to turn around after each class and tutor one of my classmates on the day's material rather than struggling to just remember how debits and credits work. Even now, nearly seven years later, I can't forget the rules of debits and credits.
This was immensely helpful when I was completing my bank reconciliation project for my accounting portfolio. Understanding the fundamentals let me recognize when something didn't look right. I was able to question ChatGPT's reasoning about the solution and the steps to get there. I'm not saying that the AI wasn't useful (it was great for generating the scenario and providing feedback to improve the writing), but I do not expect it to get everything right on its own. Remember that AI, especially those like ChatGPT which are prone to hallucinations, are a tool, not a replacement for knowing the material.
Recommended Reading
Journal of Accountancy - How Will Accountants Learn New Skills when AI Does the Work?
Bonus Question: Why Do Banks Do It "Backwards"?
So why on earth do banks present your cash accounts (assets) as increasing with credits and decreasing with debits? Is there any internal logic to this? Yes. Yes, there is.
From your perspective, the account is an asset because it represents money you own. But banks consider users' cash accounts liabilities. They are just holding onto the money for you and are obligated to give it back. That's why, from the bank's perspective, the account increases with credits and decreases with debits. So no, banks don't do debits and credits "backwards." They just have a different perspective of the account.
That's all I have for you today. Never stop learning, friends.
Disclaimer: This explanation focuses on the normal balances of the major account categories and ignores some of the more advanced aspects of accounting, such as contra-accounts. Remember that any information on this blog is for educational purposes only and should not be construed as any type of legal advice.
- Sunday, July 26, 2026
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