A lot of people who say they're "bad at budgeting" aren't actually bad at math or discipline — they've just tried systems that demand more upkeep than they're willing to sustain. Detailed category budgets, percentage rules, spreadsheets with formulas: all of it works for some people and creates friction for everyone else, and friction is what makes a budget get abandoned.
The minimum version that still works
At its simplest, budgeting is answering one question accurately: how much do I have left to spend right now? That requires knowing your income, your recurring costs, and what you've already spent — nothing more elaborate than that. Categories, percentages, and detailed tracking are optional layers on top, useful for some people, unnecessary for the core question to be answered.
Why simple systems last longer
A system you'll actually maintain for a year beats a more sophisticated one you abandon after three weeks, every time. If a detailed category budget has failed for you more than once, that's not a personal failing — it's a signal to try a simpler version of the same underlying question, not to give up on the question itself.
The goal isn't a perfect system. It's an honest, low-effort answer to "what do I have left," checked often enough that it stays useful.