Blog
Practical guides for money, contracts, health numbers, and product choices
Check a restored backup ZIP: damage that file counts miss
Test eight synthetic files with relative paths and SHA256 hashes. Reproduce missing and changed files, read the CSV results and understand what this restore test cannot prove.
Will switching to a Korean budget mobile plan save money? Compare 12 months of costs
Compare staying, switching now and waiting over 12 months of Korean mobile bills, including promotional prices, repayment charges, lost bundle discounts and device instalments.
September 2026 Korean property tax: checking a one-home bill and payment steps
Trace a qualifying KRW 500 million home's 44% ratio, principal tax, education and urban charges while separating a conditional subtotal from the actual September bill.
Korean brokerage fees: sale and rental ceilings versus agreed charges
Calculate rental-value thresholds, a KRW 700 million sale fee and negotiated charges while distinguishing jurisdiction, monetary caps, VAT and payment evidence.
Loan repayment calculations: equal payments, equal principal and interest-only
Compare a KRW 100 million, 4%, ten-year loan using formulas, first installments, total interest, final principal and the zero-rate boundary.
Choosing an AI laptop: app compatibility, memory and 3-year costs
Check actual app and peripheral compatibility, memory, battery and warranty instead of NPU numbers. Learn how to collect prices and cost inputs for a three-year comparison, including a scenario with zero resale proceeds.
Korean housing holding taxes in 2026: separate property tax and comprehensive tax
Separate per-home property tax from per-person comprehensive tax using official values, 2026 ratios and a transparent two-home example with pre-credit limits.
Calculating mortgage refinancing: outstanding principal, matching terms and cost recovery
Match current balances and remaining terms to calculate refinancing interest savings and recovery of initial costs. A hypothetical 300-month comparison distinguishes lower monthly payments from interest savings.
Comparing lump-sum and installment deposit interest: payment timing and after-tax returns
Calculate 260,000 South Korean won in interest and 219,960 after tax for 12 start-of-month payments of 1 million at 4% annual simple interest. Also compare the different cash flows of a lump-sum deposit and the costs of preferential conditions.
Daily calorie estimates: a resting-energy formula and activity-factor limits
Calculate resting energy for a 170 cm, 70 kg, 35-year-old adult and compare activity assumptions without mistaking an estimate for a personal diet prescription.
A weekly home exercise plan: strength, aerobic activity and recovery
Build a manageable home exercise week with two strength days, clearly counted walking time, a 28-minute session and practical recovery checks.
Compare Korean apartment transactions: area, dates and cancellations
Match official contract records, calculate price per square metre and median, and compare current listings without treating a price gap as a guaranteed discount.
Calculate protein intake: body-weight references and food labels
Distinguish general adult and exercise references, calculate a 70 kg example and use serving labels to total food protein without automatically adding supplements.
Korean one-home capital gains: exemption checks and taxable gain
Check household, ownership and residence conditions before allocating gains above Korea's KRW 1.2 billion threshold; distinguish taxable gain from final tax.
A seven-day sleep diary: wake times, caffeine and daytime sleepiness
Calculate estimated sleep and a seven-day average, record caffeine and daytime sleepiness, and distinguish personal observations from signs requiring medical care.
Euro travel exchange: compare EUR 500 and ATM fees
Compare total won costs for EUR 500, distinguish proportional and fixed fees, and understand DCC without assuming one travel payment mix is always cheapest.
External SSDs: USB 10 Gbps versus Thunderbolt 4
Separate link bandwidth from sustained file transfers, calculate 100 GB copy times and evaluate source, cable, thermal, capacity and backup constraints.
Choose a programming keyboard: layout, noise and connection tests
Use repeatable shortcut, typing, noise, wake and keymap tests, plus a weighted example and repair checklist, to compare keyboards for your own work.
Korean adult BMI: understand the 23 and 25 thresholds
Separate WHO international categories, Asian action points and Korean adult classification; check rounding boundaries, waist size and limits of BMI.
Korean overseas-shopping thresholds: USD 150, USD 200 and tax calculation
Distinguish Korea's list-clearance thresholds from taxable customs value and calculate duty and VAT using clearly labeled example inputs.
How to check national health-screening eligibility and prepare
Check Korean national health-screening eligibility, avoid duplicate private tests, prepare with your provider and follow up results safely.
A solo-living budget: monthly bills, delivery meals and move-in costs
Build a solo-living budget with worked examples for weekly meal costs, moving-cost payback, deposits and irregular expenses, without unsupported city averages.
Youth housing finance in Korea: rental deposits versus buying a home
Separate rental-deposit loans, home-purchase finance and subscription accounts, then calculate your funding gap and check current eligibility with the bank.
How to compare apartment management charges: consumption, shared costs and long-term repair reserves
Break down increases in management bills by item and compare matching areas and periods. Calculation examples explain South Korea's exclusion from the credit-card spending income deduction, long-term repair reserve settlements and the records to check.
Cash, installments or leasing: compare car costs over 60 months
Compare the same car over 60 months using complete cash flows, loan interest, refundable deposits and resale proceeds rather than the monthly payment alone.
How to verify rental-deposit return protection conditions
Verify published HUG and HF conditions and obtain SGI terms from the application-date provider documents. This guide does not assert a fixed ranking or unsupported SGI figures.
How to compare car-insurance quotes with identical inputs
Compare Korean car-insurance quotations with identical coverage and driver inputs, including deductible minimums, maximums and conditional discounts.
Fixed versus variable mortgage rates: calculating repayments on 300 million South Korean won over 30 years
Directly compare monthly payments and total interest at annual rates of 4%, 4.5% and 5% for 300 million South Korean won repaid over 30 years in equal principal-and-interest payments. Distinguish rate-reset timing, outstanding principal, early-repayment costs and South Korea's stress DSR.
Early severance settlement in Korea: reasons, evidence and calculations
Check statutory reasons, employer approval, supporting documents and the effect of early severance settlement on later benefits, with a worked gross-pay example.
How to choose air purifier capacity using room area and specifications
Choose an air purifier using measurable criteria: room area, certified coverage, CADR, noise, power consumption, replacement filters and safety information.
How to compare inheritance-tax and gift-tax calculation workflows
Understand Korean inheritance and gift tax through a complete gift-tax worked example, deduction checks, valuation records and the limits of comparing transfers.
Employee and local health-insurance premiums: a checking method
Check 2026 Korean health-insurance premiums using employee remuneration and NHIS assessment records, separating long-term care and other adjustments.