Be honest with yourself: If your needs take up more than 50%, that's okay — most SA workers are in the same position. The goal is to know your numbers, not to be perfect on day one.
Quick tip: If you get paid weekly or fortnightly, the same system works — just split your pay into needs, wants, and savings each time money comes in.
Remember: A budget isn't about restricting yourself. It's about giving every Rand a job, so you stop wondering where your money went.