Step 1: Turn on the calculator and press the AC (All Clear) button to reset any pending operations.
Step 2: Press and hold the TAX SET button (sometimes labeled RATE SET) for about 2-3 seconds. The display may show "0" or "SET" flashing.
If nothing happens, look for a small recessed button labeled 'TAX SET' near the top right. You will need a ballpoint pen to press it.
Step 3: When the display changes (e.g., shows "TAX %" or a blinking number), type your tax rate using the number keys. Example: type 8 . 5 for 8.5%.
Step 4: Press the TAX SET button again. The calculator will beep or flash, confirming the rate is stored.
Step 5: To check the stored rate, simply press TAX SET once without holding it. The display will temporarily show the current tax rate.
To change the tax rate, simply repeat the Procedure for Setting the Tax Rate (Section 4). The new rate overwrites the old one.
To reset to 0% (no tax):
Arthur held his breath. He pressed the SET button again (or sometimes the % button, depending on the model) to lock the number in.
The screen flashed, beeped, and returned to 0.
Arthur wasn't sure if it had worked. He typed a simple number: 100.
Then, with a trembling finger, he pressed the TAX+ button.
Magic.
The screen instantly changed to 108. The calculator had automatically added the 8% tax. He pressed the TAX- button, and it showed him the tax amount (8).
Arthur smiled, leaned back in his chair, and finished his work in half the time. how to set tax rate in casio calculator
Mr. Ito picked up his Casio (model MS-80B). He looked for a button labeled SET (sometimes written above the AC or TAX RATE key). On many Casios, the SET function is accessed by pressing and holding the AC button for 2–3 seconds, or by pressing a RATE SET key.
His model: He pressed and held the AC button until the screen showed “SET” or a blinking “0.”
Tip: If your Casio has a TAX RATE key, press and hold it instead.
Follow these steps carefully. The process typically takes less than 30 seconds.
| Step | Action | Key(s) to Press | Display / Result |
|------|--------|----------------|------------------|
| 1 | Turn on the calculator or clear any existing entries. | AC or CA | Display shows 0. |
| 2 | Enter the desired tax rate (e.g., 10%). | 1 0 | Display shows 10. |
| 3 | Press the Set Tax key sequence. | RATE (or TAX SET) then TAX+ | Confirm – some models beep or show TAX %. |
| 4 | Verify the new rate. | Press RATE then TAX- | Display shows the newly stored rate. |
| 5 | Exit setup mode. | AC or CA | Returns to calculation mode. |
Example (for 10% tax):
Arthur picked up his calculator. He knew that to talk to the machine, he had to speak its language. He pressed the AC button to clear the mind of the machine. The screen read 0. Step 1: Turn on the calculator and press
He looked at the SET button. It was usually printed in a different color (often orange or blue) above the RATE or TAX button.
"Ah," Arthur whispered. "I need the Shift key."
He pressed the SET button (sometimes labeled as RATE SET on the face of the calculator, often located above the TAX+ key or on the top left).
On some older models, there isn't a shift key. Instead, you have to press AC and hold the % key for two seconds until the screen blinks or shows Tax %.
Suddenly, the screen blinked. It was waiting for input.
If you own a Casio calculator—particularly a desktop printing calculator like the HR-100TM, DR-210TM, FR-2650RC, or a non-printing model like the MS-80F—you have likely noticed the TAX+, TAX-, and TAX SET keys. These buttons are incredibly useful for quickly adding or subtracting sales tax (VAT/GST) from a transaction.
However, many users never touch these features because they don't know how to set the tax rate originally. By default, most Casio calculators come with a tax rate of 0%. This article will walk you through the exact process, covering different Casio series, troubleshooting tips, and practical examples. Tip: If your Casio has a TAX RATE
To confirm the tax rate is set correctly: