How To Reset Financial Calculator

Your instant interactive guide to clearing and resetting popular financial calculators.

Interactive Reset Guide

Reset Instructions:

Select a model to see the reset procedure.

What Does Resetting a Financial Calculator Do?

Learning how to reset a financial calculator is a crucial skill for students, finance professionals, and anyone preparing for certification exams like the CFA or CFP. A reset, often called a “hard reset,” restores your calculator to its original factory settings. This action erases all stored data, including cash flow worksheets, statistical data, and any custom settings you may have configured.

Essentially, it gives you a clean slate. This is vital for ensuring accuracy in new calculations and is often a mandatory step before proctored exams to prevent the use of stored formulas or answers. It can also resolve unexpected errors or strange calculation results. For more info on basic operations, see our guide on financial calculator basics.

Why and When You Should Reset Your Calculator

There is no single formula for when to reset, but several situations call for it. Understanding these scenarios is key to avoiding errors in your financial modeling. A common mistake is not clearing previous work, which can lead to incorrect inputs in a new problem.

Common Scenarios for a Calculator Reset

Scenario	Reasoning	Action
Before an Exam (e.g., CFA, FRM)	Testing policies require memory to be cleared to ensure academic integrity.	Perform a full reset.
Unexpected Calculation Errors	Lingering data in memory (especially TVM registers) can corrupt new calculations.	First, try clearing the specific worksheet (e.g., CLR WORK), then perform a full reset if issues persist.
Lending/Borrowing a Calculator	Clears the previous user’s settings (like payments per year, P/Y) and data.	Perform a full reset.
Calculator Behaves Unpredictably	A reset can resolve software glitches or “frozen” states.	Perform a full reset.

Practical Examples

Example 1: Pre-Exam Preparation

A student is about to enter a finance exam. The proctor requires all calculators to be reset. The student has a TI BA II Plus. Using our guide, they select their model and see the instruction: “Press [2nd] then [+/-] for RESET, then press [ENTER] to confirm.” The calculator displays ‘RST 0.00’, confirming it’s cleared and ready for the exam.

Example 2: Troubleshooting a Faulty Calculation

An analyst is using an HP 12C to calculate a bond’s yield but gets a “Pr Error” message. They suspect a data entry error corrupted the memory. They turn the calculator off, hold the [-] key, and turn it on again. The calculator memory is cleared, and they can restart the calculation, which may be related to a complex IRR guide they were following.

How to Use This Financial Calculator Reset Guide

Using our interactive tool is simple and ensures you know exactly how to reset a financial calculator model correctly and efficiently.

1. Identify Your Calculator: Look at the make and model number on the face of your financial calculator (e.g., Texas Instruments BA II Plus).
2. Select from the Dropdown: Choose your specific model from the list in the calculator above.
3. Follow Instructions: The reset procedure will be instantly displayed in the “Reset Instructions” box. Follow the key presses exactly as shown.
4. Confirm the Reset: Most calculators provide a confirmation message (like “RST 0.00” or “Pr Error”) to indicate a successful reset.

After a reset, it is often necessary to re-enter your preferred settings, such as the number of decimal places. To understand the underlying calculations that your calculator performs, you might want to review the Time Value of Money (TVM) formula.

Key Factors and Precautions

While a reset is a powerful tool, it’s important to be aware of what it affects.

• Loss of Data: A reset is permanent and will erase all stored numbers and cash flow data. There is no ‘undo’ button.
• Payments Per Year (P/Y): Most financial calculators default to 12 payments per year after a reset. If you are doing annual calculations, you must change this setting to 1. This is a common source of errors.
• Decimal Places: The default display for decimal places (often 2) will be restored. You may need to increase this for more precision in your calculations, for instance, when working on a detailed amortization schedule.
• Calculation Mode: Some calculators have different modes (e.g., Chain vs. Algebraic Operating System). A reset will return this to the default, which may affect how you enter formulas.
• Hard vs. Soft Resets: Our guide covers the most common “hard” resets. Some models also have “soft” resets or specific worksheet-clearing functions (like `CLR TVM` or `CLR WORK`) which are less drastic and should be tried first for minor errors.
• Physical Reset Button: Some models, like the TI BA II Plus, also have a tiny physical reset button on the back that can be pressed with a paperclip for a full hardware reset.

Frequently Asked Questions (FAQ)

1. Will resetting my calculator delete its operating system?

No, resetting only clears user data and settings. The calculator’s core operating system remains intact.

2. How do I reset a Texas Instruments BA II Plus?

The primary method is to press [2nd] and then [+/-] (which has RESET printed above it). The screen will ask “RST?”. Press [ENTER] to confirm the reset.

3. How do I perform a reset on an HP 12C?

Turn the calculator off. Then, press and hold the [-] (minus) key while turning the calculator back on. Release the minus key when you see “Pr Error”.

4. What’s the difference between CLR TVM and a full reset?

CLR TVM (or a similar command) only clears the Time Value of Money worksheet registers (N, I/Y, PV, PMT, FV). A full reset clears these *and* all other memory slots and custom settings.

5. I reset my calculator, but my answers only have two decimal places. How do I fix this?

On a TI BA II Plus, for example, you can set the decimal places by pressing [2nd] then [.] (FORMAT), entering a number (e.g., 9 for nine decimal places), and pressing [ENTER].

6. Is there a way to undo a reset?

No, a reset is an irreversible action. It permanently deletes the stored data.

7. My calculator is frozen and won’t respond. Will a reset help?

Yes, a hard reset is often the best solution for an unresponsive calculator. If the key sequence doesn’t work, try the physical reset button on the back (if available) or temporarily removing the batteries.

8. How do you reset a Casio FC-100V or FC-200V?

Press [SHIFT] then to access the clear menu. Select for “All” to perform a full reset, press [EXE] to confirm, then [AC] to finish.