Overview
It systematically supports monthly, quarterly, and annual accounting closing tasks. It provides step-by-step guidance from creating closing checklists, the order of closing work by account, four major insurance and payroll settlement, K-IFRS-based closing journal entries, to preparing closing reports. It reflects the latest 2026 four major insurance rates, minimum wage, and labor law changes.
Disclaimer: This skill is AI-assisted analysis and does not replace professional advice from a certified public accountant or tax accountant.
Trigger Keywords
closing, month-end close, quarterly closing, annual closing, accounting close, payroll settlement, four major insurances, financial close, closing, closing checklist
Workflow
Step 1: Select Closing Type
- Monthly Closing (last day of each month)
- Quarterly Closing (3, 6, 9, 12월)
- Semi-Annual Closing (June, December) — mandatory for listed companies
- Annual Closing (December) — linked to corporate tax filing
Step 2: Check the Latest 2026 Standards
2026 Minimum Wage and Four Major Insurance Rates
For the 2026 minimum wage and four major insurance rate table,
moai-accountant:finance-tax-helperrefer to the single SSOT at references/2026-rates.md.
Key 2026 Changes:
- National Pension: first rate increase since 1998 (9% → 9.5%)
- Expansion of employment insurance coverage: scheduled to expand to platform workers and freelancers
- Yellow Envelope Act takes effect (2026.3.10.): expansion of subcontract workers' bargaining rights → risk for prime contractor employers
Step 3: Monthly Closing Checklist
Week 1 (Days 1-7): Close Previous Month's Transactions
- Confirm previous month's sales entries (verify tax invoice issuance)
- Verify receipt of purchase tax invoices and process accounting
- Reconcile card sales/expenses
- Collect and approve expense reports
Week 2 (Days 8-15): Payroll Settlement
- Prepare payroll ledger (verify minimum wage compliance)
- Calculate four major insurance deductions (apply 2026 rates)
- Withhold income tax and local income tax
- File and pay withholding tax — for previous month's payments, by the 10th of each month (Withholding Tax Payment Status Report, Income Tax Act Article 128; for businesses approved for semi-annual payment special case, the 10th of January and July)
- Submit simplified payment statement (business income and earned income, Income Tax Act Article 164-3)
- Transfer payroll and issue pay statements
- Report four major insurances (EDI or Four Major Insurance Information Link Center)
Week 3 (Days 15-20): Account Closing
- Record depreciation expense
- Adjust prepaid expenses and accrued expenses
- Physical inventory count (if necessary)
- Review accounts receivable and accounts payable balances
- Foreign currency asset/liability translation (applying month-end standard exchange rate)
Week 4 (Days 20-End of Month): Closing Report
- Trial balance review and error correction
- Draft income statement preparation
- Analysis of changes in key indicators compared to previous month
- Preparation of closing summary for management reporting
Step 4: Additional Annual Closing Tasks
Corporate tax filing preparation (for corporations with a December fiscal year-end: by March 31 of the following year)
- Review of tax adjustment items (entertainment expense limits, depreciation methods, etc.)
- Review of utilization of carryforward losses
- Confirmation of research and human resource development tax credits
Year-end payroll tax settlement (during January)
- Receipt of employee year-end tax settlement documents
- Confirmation of income deduction and tax credit items
- Issuance of withholding tax receipts (by end of February)
Review of early adoption of K-IFRS No. 1118 (2026)
- Preparation for classification of income statement into 5 categories
- Decision on whether to disclose MPM
Step 5: Generation of Closing Report
# [YYYY년 MM월] 결산 보고서
## 손익 요약
- 매출액: xxx원 (전월 대비 ▲▼ xx%)
- 영업이익: xxx원 (영업이익률 xx%)
- 당기순이익: xxx원
## 주요 비용 분석
## 4대보험 납부 현황
## 다음 달 주요 일정
Usage Examples
Example 1: "Create a March month-end closing checklist" → Confirm closing type → Weekly tasks → Apply 4 major insurance rates → Generate checklist
Example 2: "Tell me how to settle payroll for our company in 2026. We have 5 employees." → Payroll ledger format → 4 major insurance calculation → Withholding → Filing procedure
Example 3: "Draft an annual closing report" → Year-over-year analysis → Key indicators → Management summary → Improvement recommendations
Deliverables
- Monthly/quarterly/annual closing checklist
- Payroll ledger and 4 major insurance calculation details
- Closing report (including management summary)
- Tax filing schedule calendar
Precautions
Disclaimer: This is AI-assisted analysis and does not replace professional advice from a certified public accountant or tax accountant.
Major Filing Schedule (Based on December Fiscal Year-End for Corporate Tax)
| 월 | Filing/Payment Items |
|---|---|
| 1월 | VAT filing (2nd period final), year-end tax settlement |
| 2월 | Year-end tax settlement refund/additional payment, submission of payment statements |
| 3월 | Corporate tax filing/payment (by March 31) |
| 4월 | VAT preliminary filing (1st period) |
| 7월 | VAT filing (1st period final) |
| 8월 | Corporate tax interim prepayment (by August 31) |
| 10월 | VAT preliminary filing (2nd period) |
4 Major Insurance Filing Deadlines
- Acquisition/loss filing: within 14 days from the date the reason occurs
- Total remuneration filing: by March 15 each year
- Monthly insurance premium payment: by the 10th of each month
Troubleshooting
- Unable to confirm tax rate/rate changes: Please check the latest rates directly on the National Tax Service (nts.go.kr) or the 4 Major Insurance Information Link Center (4insure.or.kr). The figures provided by AI are for reference only, and official notices must be checked when actually filing.
- Past accounting data not provided: Without prior-period financial data, period-over-period analysis is impossible. Please provide the income statement and general ledger for the analysis period together.
- ERP integration error: If you paste CSV/Excel files exported from ERPs such as SAP, Douzone, or iCUBE directly, closing checklist automation becomes possible.
- Foreign currency translation date mismatch: Please check the month-end official exchange rate from the Bank of Korea base rate (ecos.bok.or.kr) and then enter it.
Related skills
- moai-accountant:finance-financial-statements: K-IFRS financial statement preparation
- moai-accountant:finance-variance-analysis: Budget vs. actual performance analysis
- moai-accountant:finance-tax-helper: Tax filing, HomeTax guidance
Post-processing chain (narrative outputs such as closing reports and executive summaries)
After writing sentence-based outputs such as closing reports, executive summaries, and expense analysis comments, always finish with the chain below.
finance-close-management → moai-coworker:ai-slop-reviewer → moai-writer:korean-humanize → 최종 검수
- moai-coworker:ai-slop-reviewer: Review and revise AI-sounding expressions, exaggeration, and clichés
- moai-writer:korean-humanize: Korean naturalness correction (limited to narrative outputs)
Table and numeric outputs such as payroll ledgers, four major insurance calculation details, and tax schedule calendars are not subject to the chain, and if Excel conversion is needed,
moai-officer:doc-xlsxroute to.
When not to use this skill
- Actual tax filing and payment: Do not submit an AI-written closing draft to the tax office as is. Request review from a tax accountant.
- Official preparation of financial statements: If financial statements for external audit or disclosure are needed,
moai-accountant:finance-financial-statementsuse the skill together with review by a certified public accountant. - Budget vs. actual performance analysis: For strategic cost and revenue variance analysis,
moai-accountant:finance-variance-analysisthe skill is more suitable. - Tax consultation: For consultation on how to file comprehensive income tax and value-added tax,
moai-accountant:finance-tax-helperuse the skill.
References
| File | load conditions |
|---|---|
| references/edi-tax-invoice.md | When electronic tax invoice HomeTax issuance, receipt, correction, or mandatory procedures are needed |