Counting gross pay backwards — negotiating a salary for ₩3M take-home
Say ₩3M take-home in a salary negotiation and the company offers ₩36M, ₩3M × 12, but that salary puts ₩2,626,693 in your account, ₩370,000 short. For ₩3M take-home the salary must be ₩41,664,000, over ₩5.6M more. Converting take-home to gross is not multiplication. Social insurance is a rate and income tax a table, so gross must be set before take-home appears; take-home does not yield gross directly.
Conditions used in the calculation
- Case
- take-home targets ₩2.5M · ₩3M · ₩4M · single · no tax-free items · 100% withholding · 2026 rates
- Step ①
- direction · gross → take-home is one pass · the table cannot be inverted, so the reverse is repeated trials
- Step ②
- three numbers · gross and annual salary for ₩2.5M · ₩3M · ₩4M
- Step ③
- what the gap is made of · ₩472,000 into social insurance and tax
- Step ④
- conditions · tax-free items · dependents · part-time hours · withholding ratio
- Rounding
- gross rounded up to the thousand
Results
- ₩3M take-home
- gross ₩3,472,000 · salary ₩41,664,000
- ₩36M salary (₩3M × 12)
- take-home ₩2,626,693 · ₩370,000 a month · over ₩4.4M a year short
- ₩2.5M take-home
- gross ₩2,843,000 · salary ₩34,116,000 · 1.14×
- ₩4M take-home
- gross ₩4,806,000 · salary ₩57,672,000 · 1.2×
- The ₩472,000 gap
- social insurance ₩337,388 + income and local tax ₩134,563 (premiums 2.5× the tax)
- Over ₩5.6M
- ₩41,664,000 − ₩36M
- Part-time threshold
- 15 hours a week as of 2026-09-05 · employment insurance income-based from 2027-01-01
At a glance
1.14× at ₩2.5M, 1.157× at ₩3M, 1.2× at ₩4M.
- ₩2.5M take-home → gross₩2,843,000
- ₩3M take-home → gross₩3,472,000
- ₩4M take-home → gross₩4,806,000
Why it works this way
In a salary negotiation you asked for ₩3M take-home. The company offers ₩36M, ₩3M times twelve. But the money that salary puts in your account is ₩2,626,693, ₩370,000 short. For ₩3M take-home the salary must be ₩41,664,000, over ₩5.6M more. Converting take-home to gross is not multiplication. Social insurance is a rate and income tax is a table, so gross must be set before take-home appears; take-home does not yield gross directly. Most people sit down without knowing this direction and lose ₩370,000 a month. The rough ×1.2 is common, but the multiple grows as pay rises.
The withholding table is written per gross band and cannot be inverted.
- Gross → take-homeapply the rates · find the cell · done (one pass)
- Reversetry a gross · raise if short, lower if over (repeat)
- Suikbangautomatic to the thousand · by hand, one missed rate throws it off
Most people get confused here: a percentage holds only at that gross, and not knowing, you name a multiple and lose every month.
Step ② Three numbers. Single, no tax-free items, 100% withholding: ₩2.5M take-home needs ₩2,843,000 gross and ₩34,116,000 a year; ₩3M needs ₩3,472,000 and ₩41,664,000; ₩4M needs ₩4,806,000 and ₩57,672,000. The multiple is 1.14 at ₩2.5M and 1.2 at ₩4M, growing with pay. The ₩36M in the opening is a salary worth ₩2.62M take-home, and signing it costs over ₩4.4M a year. In reverse, ₩41.66M gives ₩3.47M gross and ₩3M take-home, so retrace in the order salary ÷ 12 → gross → take-home.
The gap between ₩3M and ₩3,472,000.
- Social insurance₩337,388 (proportional)
- Income and local tax₩134,563 (stepped)
- Ratiopremiums 2.5× the tax. At this pay level, premiums outweigh tax
Raise gross a little and take-home rises less; for the same money, a tax-free meal allowance or employer-paid items leave more in the account. Premiums come back to you and differ in nature from tax, but this month they look the same, so keep them on separate lines of the negotiation sheet.
Step ④ What the conditions change. The three numbers assume single with no tax-free items. ① A tax-free ₩200,000 meal allowance stays in the account free of premiums and tax; ② more dependents cut income tax and lower the gross needed; ③ a part-timer under 15 hours a week is outside social insurance, so the distance is short, and as of 2026-09-05 the test is hours, and for employment insurance it switches to income from 1 January 2027. Conditions move the figure by millions, so not knowing means naming a gross on a basis that does not exist. The withholding ratio is a condition too: 80% is money returned in February, and the negotiation sheet uses 100%. The sheet is three lines: ① the take-home you want and your conditions (family, tax-free items, ratio), ② the retraced gross and salary, ₩41,664,000 for ₩3M, ③ whether bonuses are included, per the contract's definition of salary. With three lines the preparation is done; check the company's salary ÷ 12 down to take-home with the four payslip lines.
All four steps are passed: climb the table, ₩41,664,000 for ₩3M, ₩337,388 of premiums and ₩134,563 of tax, and conditions that change the figure. Name ×12 and you lose ₩370,000 a month, over ₩4.4M a year. Two things to do now: write the take-home you want as gross and salary, and retrace the company's salary ÷ 12 to take-home to compare. Rates and tables change yearly and salary definitions vary by company, so check with payroll. Gross does not come from multiplication. Count backwards from take-home to get the contract figure.
The legal basis
Drawn from government announcements and the statutes themselves as primary sources, covering only the relevant part.
Income Tax Act Article 134 · Enforcement Decree Article 194 (Withholding table · Withholding ratio)
In force Current · 2026 table (checked 2026-09-05)
Income tax is withheld monthly according to the simplified table, and the employee may elect 80%, 100% or 120%.
What this means
The table is written per gross band and cannot be inverted. Counting backwards means trying gross figures repeatedly.
National Pension, Health Insurance, Long-Term Care and Employment Insurance Acts (2026 rates)
In force Current (checked 2026-09-05)
Pension 4.75% · health 3.595% · long-term care 13.14% of health · employment 0.9%. All proportional to monthly pay.
What this means
Raising gross raises premiums too, so take-home rises less than gross. ₩337,388 of the ₩472,000 sits here.
Income Tax Act Article 12(3)(r) (Tax-free meal allowance)
In force Current (checked 2026-09-05)
Meal allowances of ₩200,000 or less a month are tax-free.
What this means
The first condition that lowers the gross for the same take-home.
Employment Insurance Act Article 10 (amended 2026-03-17 · effective 2027-01-01)
In force Effective 2027-01-01
The exclusion test changes from hours (under 60 a month) to an income test.
What this means
From 2027 a part-timer's distance to social insurance is measured by income. The same provision as the upcoming-law page news-ei-income-threshold.
Run it on your own numbers
The calculator opens with these conditions already filled in. Change the figures and your own case comes straight out.
Open the Gross Salary from Take-Home Pay
Frequently asked
What salary should I ask for to take home ₩3M?
Single, no tax-free items, 100% withholding: ₩3,472,000 gross, ₩41,664,000 a year. ₩3M × 12 = ₩36M gives take-home of ₩2,626,693, ₩370,000 short each month.
Can I just multiply by 1.2?
The multiple differs by pay: 1.14 at ₩2.5M and 1.2 at ₩4M, growing with pay. You have to climb the table by trying gross figures.
Is most of the ₩472,000 tax?
No. Social insurance of ₩337,388 is 2.5 times the ₩134,563 of tax. At this pay level premiums outweigh tax.
Does a tax-free meal allowance lower the gross needed?
Yes. A ₩200,000 meal allowance stays in the account free of premiums and tax, lowering the gross for the same take-home. More dependents cut income tax and lower it too.
Is it the same for a part-timer under 15 hours?
Outside social insurance, the distance between gross and take-home is short. As of 5 September 2026 the test is hours; from 1 January 2027 employment insurance switches to an income test.
Are bonuses part of the salary?
It varies by company. Check the contract's definition of salary for whether bonuses and incentives are included, and put it on the third line of the sheet.
Results are estimates based on the inputs and on the rules as at the stated date. They may differ from a lender's actual assessment, and the rules change often. Take professional advice before any decision that matters.