How To Set Tax Rate In Casio Calculator [better] May 2026

How to Set the Tax Rate on a Casio Calculator: A Complete Guide (For All Major Models)

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.

How to Set the Tax Rate on a Casio Calculator

Follow these steps to program the tax rate so the calculator can quickly add or remove tax.

1. Turn the calculator on.
2. Enter the desired tax rate as a number (e.g., for 8.25% type 8.25).
3. Press the [SHIFT] key, then press [TAX+] (often labeled with % or TAX+ above a key).
   • This stores the entered percentage as the tax rate.
4. To add tax to a price, enter the price and press [TAX+].
5. To remove tax (calculate pre-tax price), enter the taxed price and press [TAX-].

Notes:

• Some Casio models label the tax function as [GT/TAX], [TAX+]/[TAX-], or use a dedicated [%TAX] key—look just above the keys for the TAX+ and TAX- labels.
• If you need to change the rate, simply repeat steps 2–3 with the new percentage.

Example:

• Set 8.25%: 8.25 → [SHIFT] → [TAX+]
• Add tax to 100.00: 100 → [TAX+] → displays 108.25
• Remove tax from 108.25: 108.25 → [TAX-] → displays 100.00

If you tell me your Casio model (e.g., fx-991ES, MS-80B), I can give exact key labels.

(Invoking related search suggestions.)

To set the tax rate on a Casio calculator, you typically use a combination of the

. While the exact steps vary slightly by model—such as the MS-80TV desktop series or HR-8TE printing models—the fundamental logic of holding a "Set" key and entering a numeric value remains consistent. Core Steps for Standard Desktop Models

For many common desktop and portable Casio models (e.g., MS, SL, or HL series), the process follows these steps: Clear the Memory : Press the

key to ensure no previous calculations interfere with the setting. Enter Setup Mode : Hold down the

key (often labeled with "SET" above it) for approximately two seconds until the display clears and "SET" or "0" reappears. Select the Function : Press the key to indicate you are programming a tax rate. Input the Rate

: Type the desired percentage (e.g., for an 8% tax rate, press Save the Setting : Press the how to set tax rate in casio calculator

key again to lock the rate into the calculator’s permanent memory. Variation for Specific Models Print-Above Models

: If your calculator has "Rate set" printed directly above the key, you can often skip the [TAX+] step. Simply hold , input the rate, and press Printing Calculators (HR Series)

: These often require the device to be in "Print" mode before holding the key for three seconds to begin programming. Cash Registers

: Commercial Casio registers require turning a physical key to the

(Programming) position and using specific numeric codes like 3 [SUBTOTAL] followed by a tax table index (e.g., 0125 for Tax 1). Verifying and Using Your Rate CASIO【How to use calculator Tax calculations】

Here’s a useful, practical story that walks through setting a tax rate on a standard Casio calculator (like the popular Casio HL-815L, MS-80B, or similar “tax” models). How to Set the Tax Rate on a

Title: Mr. Ito’s Bakery and the 10% Tamago Tax

Mr. Ito ran a small bakery in Osaka. Every day, customers bought his famous tamago (egg) bread. But Mr. Ito had a problem: Japan’s consumption tax had just changed to 10%, and he was tired of fumbling with his phone’s calculator. “I need the tax added instantly,” he sighed.

His old Casio desktop calculator had two mysterious keys: TAX+ and TAX−. He’d never used them. “Time to learn,” he said.

6.2 Subtracting Tax (Finding net price from gross price)

• Enter the gross price (including tax) (e.g., 1 1 0 for $110).
• Press TAX–.
• Display shows: Tax amount briefly, then Net price (price before tax).

Example with 10% tax: 110 TAX– → Shows 10 (tax), then 100 (net price).

6. Using the Set Tax Rate

Part 6: Which Casio Models Support Tax Rate Setting?

Here is a quick reference for compatibility:

Yes (Tax function available):

• HR-100TM, HR-150TM, HR-200RC
• DR-210TM, DR-270TM, DR-320TE
• FR-2650RC, FR-2650RT
• MS-80F, MS-100F, MS-120F
• DJ-120D, DJ-240D
• MX-12B, MX-8B

No (No tax function):

• Basic 8-digit calculators (e.g., HL-820LV)
• Scientific calculators (e.g., FX-991EX)
• Financial calculators (e.g., FC-200V, which uses a different TVM system)