Foreign Worker Take-Home Pay Calculator

This calculator works out what a foreign employee in Korea actually takes home after income tax and the four social insurances. Enter your annual gross pay, whether you elect the flat tax rate, how your national pension is treated, whether health and employment insurance apply, and the number of dependants, and it shows annual and monthly net pay, the share of gross pay that is deducted, and each deduction line by line.

What sets it apart from other net pay calculators is that it treats the national pension three ways. Depending on your country, you may not join at all, you may join but get nothing back when you leave, or you may get back what you paid plus the employer's contribution. Each case changes both the monthly deduction and the lump sum on departure, so the calculator runs all three.

Foreign nationals weighing a job offer in Korea who want to know what the salary means after deductions. It also serves as a check against the pay slip once it arrives. Employers hiring foreign staff can use it to budget the full labour cost including the employer share, and advisers who support foreign workers can use it to explain what the pension refund would be.

It also helps decide whether to elect the flat rate. Foreign employees may give up every deduction in exchange for a single rate on gross pay; that is favourable at high salaries and unfavourable at low ones. Entering the same salary under both methods shows immediately which is better.

Income tax follows one of two methods. Under ordinary taxation, the same as for Koreans, gross pay less the earned income deduction, basic personal deductions and other deductions gives the taxable base, progressive rates are applied, and the earned income tax credit is subtracted. Under the flat rate in 조세특례제한법 제18조의2, no deductions are used and income tax is simply 19% of gross pay. Either way, local income tax adds 10% of the income tax.

The national pension applies to foreigners under 국민연금법 제126조제1항, unless the worker's home country does not extend its pension to Korean nationals, in which case there is no enrolment. Those enrolled pay 9.5% of the standard monthly income, split equally between worker and employer. That standard income has a floor and a ceiling: pay below the floor is assessed at the floor, and pay above the ceiling stops there. The lump-sum refund is in principle unavailable to foreigners under 제126조제5항, but nationals of countries that pay a lump sum to Koreans, workers under the Employment Permit System and some others are exceptions. Where it applies, 제77조제2항 refunds the worker's contributions plus the employer's contributions plus interest; the calculator shows the principal only.

Health insurance under 국민건강보험법 제109조제2항 covers foreign employees who have registered as residents, at 7.19% of pay split equally, with long-term care insurance of 0.9448% also split equally. Employment insurance under 고용보험법 제10조의2 applies in full or in part depending on visa status, and where it applies the worker pays half of the 1.8% unemployment benefit rate. Industrial accident insurance is paid entirely by the employer and does not affect net pay. The calculator adds income tax, local tax and the worker's share of each insurance, subtracts the total from gross pay, and divides by twelve for the monthly figure.

Take a foreign employee on ₩50,000,000 a year under ordinary taxation, claiming only the personal deduction, eligible for the pension refund, and covered by both health and employment insurance. Income tax is ₩3,517,500 and local tax ₩351,750. The worker's pension contribution is ₩2,375,000 a year, matched by the employer. Health insurance of ₩1,797,500, long-term care of ₩236,200 and employment insurance of ₩450,000 bring the worker's insurance total to ₩4,858,700. Total deductions of ₩8,727,950 leave ₩41,272,050 for the year, or ₩3,439,338 a month, with 17.5% of gross pay going out. After five years, the pension refund principal, worker and employer contributions combined, is ₩23,750,000, with interest on top.

Elect the flat rate on the same salary and income tax jumps to 19% of gross pay, ₩9,500,000; monthly net pay falls to ₩2,890,942 and the deduction rate rises to 30.6%. At this salary level, ordinary taxation is the better choice. Conversely, a national of a country whose law keeps them out of the Korean pension altogether pays no pension contribution and takes home ₩3,637,254 a month, but has nothing to reclaim on departure.

The most common one is writing the pension off as money you will never see. Depending on your country and visa, you may get back your own contributions plus the employer's, which is twice what you paid each month, with interest. The opposite assumption is also a mistake: some countries' nationals are enrolled but cannot claim the refund. Which group you fall into is set by treaty and the other country's law, so confirm it directly with the National Pension Service.

The second is assuming the flat rate is always better. It trades away every deduction for a fixed percentage of gross pay, so at a lower salary or with several dependants it costs more than ordinary taxation. Run both and then choose. The third is including tax-free allowances in gross pay. Allowances such as meal money that carry no tax should be left out for the result to be right.

The fourth is relying on old rates. The pension and health insurance rates and the standard income floor and ceiling change every year, and this calculator uses the values as of the date shown on the page. Finally, part-time workers on short hours sometimes see a surprisingly high deduction rate. Pay below the standard income floor is assessed at the floor, but with short hours you may not be subject to enrolment at all, so check with the National Pension Service.