What is BudgetDuo?

BudgetDuo is a web tool that calculates how much you and your partner should each contribute toward shared expenses. It is aimed at couples who split common costs and want a straightforward way to decide a fair contribution for each person. One practical condition to know up front: the site is a JavaScript app, so it will not run unless JavaScript is enabled in your browser.

What BudgetDuo does

Based on the site's own description, BudgetDuo's single stated purpose is to "calculate how much you and your partner should contribute towards shared expenses." That makes it a contribution-splitting calculator rather than a full budgeting, banking, or expense-tracking platform.

The core output is a per-person contribution figure for shared costs. In other words, instead of guessing at a 50/50 split, you use the tool to work out what each partner should put in.

Who it is for

BudgetDuo fits couples who:

• Have recurring or one-off shared expenses (for example rent, utilities, groceries, or household bills)
• Want to divide those costs between two people
• Prefer a calculated split over an arbitrary one

If you are budgeting solo, or looking for a tool that connects to bank accounts or tracks spending over time, this is not what the site describes itself as doing.

What to expect when you use it

The only technical detail available from the site is that JavaScript must be enabled for the app to run. If you open the page and see a message about enabling JavaScript, that is expected behavior, not a broken link — turn JavaScript on and reload.

Beyond that, the available page information does not specify input fields, pricing, account requirements, or login. Treat those as unknown rather than assuming the tool is free or requires no sign-up.

Quick summary

If your goal is simply to agree on a fair contribution for shared bills, BudgetDuo is built for exactly that task. Enable JavaScript, open the site, and use it to settle the split.