Free Mini Banking System Project – Google Sheets Apps Script

FREE002 is a mini banking model: open an account, pay money in, take money out, and read back the history of what happened. Four operations, built end to end on Google Sheets so you can see exactly how each one works.

The four operations

Creating an account sets up the holder and their starting position. A deposit adds to the balance and records the movement. A withdrawal takes from it and records that too. The transaction history then shows the account's movements in order, which is the part that turns a balance into something you can actually check — a number on its own tells you nothing about how it got there.

Built to be understood

The emphasis here is on simplicity rather than coverage. Each feature is walked through on screen so the logic behind it is visible: where the balance lives, what a deposit changes, how a withdrawal is recorded. That makes it a working reference for how banking operations are modelled, and a sound starting point if you are building something larger of your own.

Who it suits

Students building a web application project of this kind, and anyone who wants to understand account and transaction handling in Apps Script before committing to a bigger build. It runs as a deployed web app on a link, with the sheet behind it as the store.

Be clear about the scope

This is a model of banking operations, not banking software. There are no service charges, no interest calculation, no branches, no statements and no security layer suitable for real money. Treat it as the concept and the code behind it. If you want the fuller version — account holders, deposits, withdrawals with a charge applied, transaction IDs and per-holder totals — FREE038 in this catalogue is the file that carries those.