Budget Planner

Most personal finance content focuses on stock picks, investment products, and complex tax strategies. Almost all of it is downstream of a simpler discipline: knowing where your money goes each month. People with no budget tend to lose 5-15% of their income to invisible drift — subscriptions they forgot, fees they don't notice, lifestyle creep that climbs faster than salary. People who maintain even a rough monthly budget close that leak — and over a 30-year working life, recovering that 5-15% is worth more than almost any single investment decision they'll make. Budgeting is boring, repetitive, and the single most leveraged financial habit there is.

50/30/20 — the rule that mostly works

The 50/30/20 framework was popularised by US Senator Elizabeth Warren in her 2005 book All Your Worth. The premise: divide your take-home income three ways — 50% to Needs (essentials you can't easily cut), 30% to Wants (lifestyle choices you could reduce), and 20% to Savings & Debt repayment beyond minimums. The numbers aren't precise — different financial situations call for different splits — but the structure forces you to categorise every expense, and the targets force you to confront overspending in any one category. For people earning median wages in major APAC cities, the rule is often aspirational rather than achievable (housing in Singapore, Hong Kong, Tokyo regularly exceeds 50% alone). The fix is to use the framework as a diagnostic — not a prescription. If Needs is at 65% of income, that's information: you're under-housed-flexibility-budget, you'll be slow to recover from any income shock, and you should treat 'lifestyle creep into Wants' as a serious risk.

The average Singaporean household spends 38% of income on housing (rent or mortgage). The average Hong Kong household: 47%. The 50/30/20 rule was written for US suburbs — adjust accordingly.

The APAC household budget landscape

Cost-of-living patterns shape budget reality across APAC. Singapore, Hong Kong, Tokyo, Seoul, Sydney are housing-heavy markets — rent or mortgage typically consumes 30-50% of net household income, before any "Needs" optimisation is possible. Kuala Lumpur, Bangkok, Manila, Jakarta, Ho Chi Minh City have lower housing costs (10-25%) but higher discretionary categories — dining out is more common, transportation costs more variable. Mumbai, Delhi, Bengaluru sit between the two — housing 20-35%, but food and transport much lower. Mainland China cities vary wildly — Tier 1 (Beijing, Shanghai, Shenzhen) is housing-dominated; Tier 2-3 cities have very different ratios. Auckland, Wellington, Brisbane follow a Sydney-like pattern. Savings rates across APAC tell the same story: Singapore (CPF), Malaysia (EPF), Hong Kong (MPF) have mandatory retirement savings of 15-37% of income on top of household savings. Indian, Indonesian, Philippine, Thai, Vietnamese households save heavily in cash and gold/property due to less developed pension systems. Japanese households historically save 20-30%; Korean households 8-12%; Australian 7-10%. The 50/30/20 framework is a useful starting point but always adjust to your local cost-of-living reality.

What this planner doesn't track (intentionally)

It doesn't connect to your bank. It doesn't auto-import transactions. It doesn't track every individual purchase. Those features come at a real cost — usually requiring you to give a third-party app access to your bank credentials, which crosses a security line many people aren't fully aware of. This tool is intentionally manual — you type the numbers, you see the categories, you make the decisions. The trade-off is that it doesn't keep itself up-to-date automatically; you need to come back and update each month. The benefit is that nothing about your finances ever leaves your laptop. For bank-connected automated tracking, look at YNAB, Mint, or the bank's own apps; just know what data you're sharing.