Invoice Builder
Builds a 거래명세서, 견적서 or 청구서 from line items with VAT separate, included or none, validates business numbers, and prints to PDF or saves XLSX.
A 거래명세서 or 견적서 with the VAT calculated the way Hometax calculates it: 10% of each line’s supply amount truncated to the won, with the document total as the sum of the line taxes. Doing it the other way round — 10% of the document total — is how an invoice ends up a won out.
Document
The unit price carries no tax and the tax is calculated separately, truncated to the won.
Supplier (공급자)
Customer (공급받는자)
Items
| Item | Specification | Quantity | Unit price | Supply amount | Tax | |
|---|---|---|---|---|---|---|
Supply amount
0 won
Tax
0 won
Total
0 won
Export
The print button opens an A4-laid-out page in a new window and raises the browser’s print dialog. Choosing “Save as PDF” there produces the PDF.
How to use it
Choose the document type and the VAT mode
Excluded, included or none. “Included” splits the unit price back into supply and tax rather than adding to it.
Fill in both parties
The business registration number is checked as you type — by its check digit, which catches a typo. Your own details can be remembered in this browser so you do not retype them.
Add the line items
Quantity and unit price per row; the supply, tax and total are computed per line and shown as you go.
Print to PDF, or save the XLSX
The print button opens the A4 page in a new window and raises the print dialog; “Save as PDF” there produces the file.
Common questions
Is this a 세금계산서?
No. A tax invoice is issued through Hometax or an approved provider and has legal effect; this is a statement of what was traded, which is what most transactions actually exchange. Issue the 세금계산서 separately.
Does it check whether the business number is real?
Only the check digit, which is arithmetic on the number itself. Whether that business is registered and active is a lookup at the NTS, and this page makes no network requests at all.
Why does it not export a PDF directly?
Because laying out a page needs a text engine this site does not have. The browser already has one, and its print-to-PDF produces a better document than a hand-rolled layout would — with your fonts, at your paper size.
Feed it from
Currency Converter
Converts between about thirty currencies at the ECB’s daily reference rates, crossed through the euro, or at a rate you type in.
Time Tracker
Starts and stops one timer at a time per task, then exports a CSV timesheet totalled by task and by day, with optional billing increments.
Freelance Withholding Calculator
Computes the 3.3% withholding on freelance income both ways — from gross and from the amount received.
VAT Calculator
Adds or removes the 10% VAT and splits a total into supply value and tax for invoice lines.
Next
These accept what this tool produces, so the result can go straight in.
Currency Converter
Converts between about thirty currencies at the ECB’s daily reference rates, crossed through the euro, or at a rate you type in.
VAT Calculator
Adds or removes the 10% VAT and splits a total into supply value and tax for invoice lines.
PDF Fill & Sign
Fills in a received PDF for submission: tick checkboxes, type text and dates, place a signature or stamp, then flatten.
Time Tracker
Starts and stops one timer at a time per task, then exports a CSV timesheet totalled by task and by day, with optional billing increments.
CSV to Excel
Writes one or many CSV files into an .xlsx workbook with typed columns, a header row and filters.
Workbook Merger
Combines many workbooks or sheets into one, stacking rows or adding each source as its own sheet.