Single Living Cost Calculator

Single Living Cost Calculator helps Estimate one-time and recurring household costs over a selected planning period.

Utilities total
₩131,346
Rent tax credit estimate
₩1,020,000

Monthly total

₩1,591,346

Annual total

₩19,096,152

Monthly savings

₩908,654

36.3% savings rate

Expense-to-income

63.7%

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Single living cost calculator guide

This English page translates the Korean single-living cost calculator and calls calculateSingleLivingCost. It preserves monthly rent, jeonse interest, management fee, electricity, gas, water, internet, phone, living expenses, 50/30/20 analysis, emergency fund, and rent tax credit.

Housing and utility model

Housing cost is monthly rent for a monthly-rent home, monthly loan-interest equivalent for jeonse, or zero rent for owned housing, plus management fee. Jeonse monthly interest is deposit times annual rate divided by 12.

The 2026 electricity model uses progressive residential tiers. Summer tiers are 0 to 300 kWh, 300 to 450 kWh, and above 450 kWh, while other seasons use 0 to 200 kWh, 200 to 400 kWh, and above 400 kWh. Climate-environment and fuel adjustments, VAT, and the electricity fund are included.

Gas, water, living cost, and averages

Gas cost uses a base charge, MJ conversion per cubic meter, unit rate, and 10% VAT. Water uses Seoul-style base charge, usage tiers, and sewer charge. Phone and internet are included unless management fee already includes them.

The Korean average reference for a one-person household is KRW 1,850,000 per month with category references for housing, utilities, food, transport, household goods, personal care, entertainment, subscriptions, insurance, and other spending.

Budget optimization

The output includes monthly total, yearly total, savings amount, savings rate, income-to-expense ratio, category breakdown, comparison with average, monthly forecast, and saving suggestions.

The optimization section keeps the 50/30/20 rule: needs 50%, wants 30%, savings 20%. It also estimates emergency-fund targets for 3, 6, and 12 months and rent tax credit with a KRW 7,500,000 annual rent cap and a 17% credit-rate scenario.