How to Save on 4 Million Won Monthly Rent for Sole Proprietorships

Dual Tax Savings Structure for Monthly Rent and Principles for Expense Recognition

VAT Refunds Through Input Tax Credits

Monthly rent of 4 million won amounts to an annual scale of approximately 48 million won, representing a fixed expense for sole proprietors and a key means of reducing taxes. Operators registered as general taxpayers can enjoy dual tax savings benefits through input tax deductions and recognition as necessary expenses for rent payments. Since the paid monthly rent includes 1/10th VAT, the method involves deducting 400,000 won monthly, up to 4.8 million won annually, from the VAT payable.

Even during deficit periods where purchase tax exceeds sales tax, refunds should not be forfeited. According to one business owner's actual case, during the January VAT filing, sales of 43 million won and purchases of 67 million won were recorded, resulting in a refund of approximately 2 million won. This principle applies equally to global income tax filing. Since business deficits arising from high purchases relative to sales are taxed in aggregation with other global income, accurately reporting deficits helps reduce the overall tax burden.

Securing Evidence and Basic Principles of Expense Processing

To process rent as an expense, you must receive a cash receipt for expense purposes or a tax invoice from the landlord. Specifically, since building owners are often non-business individuals rather than sole proprietors, it is safest to state the business registration number in the lease agreement and issue a purchase tax invoice via HomeTax. Simply transferring monthly rent via a bank account without proof serves as a fatal cause for denying expense recognition during a tax audit.

Analyzing Tax Differences by Global Income Tax Filing Method

Limitations of Estimation Filing and the Necessity of Simplified Ledgers

The estimation filing method, which applies the National Tax Service's notified simple expense ratio without bookkeeping, is absolutely disadvantageous for business owners with high fixed expenses. This method, which recognizes a lump-sum expense by multiplying the annual revenue by the simple expense ratio, prevents the full 48 million won in annual rent from being reflected as an expense. Therefore, a strategy involving bookkeeping and filing using a simplified ledger is essential to reflect the entire rent actually paid as a deficit.

Risks of Improper Accounting Treatment

Cases often occur where the rent item is left blank in the ledger and no expense is claimed during global income tax filing to avoid friction with the building owner. This is not tax saving but a serious loss resulting in overpayment. Even if input tax credit benefits are unavailable due to missed VAT reporting or failure to issue tax invoices, the pure rent excluding VAT must be processed as other purchase expenses during global income tax filing. This lowers the taxable base, thereby reducing income tax liability.

Deep Tax Saving Strategies Through Depreciation and Spatial Separation

Utilizing Depreciation for Rental Business Owners

For general rental business owners who purchase and lease studios, rather than paying monthly rent, the approach differs. In situations where property must be sold at a low price relative to the purchase cost, depreciation processing should be actively utilized when filing global income tax. By capitalizing the acquisition cost over years as an expense, this system reduces book income to lower taxes and increases the likelihood of receiving a favorable assessment for capital gains tax calculations.

Clear Separation of Business and Residential Spaces

All rent expenditures must prove a direct relevance to the business to be processed as an expense. If the office and actual living space are mixed, the National Tax Service does not view the entire monthly rent as for business use. In this case, to avoid the risk of additional taxation, the rent must be apportioned and reported according to the actual area ratio used for business. Keeping lease agreements, transfer records, and VAT filing records consistent and thoroughly stored is the key task in preparing for a tax audit.

Practical Guide to Rent Expense Processing by Stage

Business Registration and Contract Preparation

The business address must be accurately stated in the lease agreement, and business registration must be completed. At the time of contract, verify the landlord's business registration status; if the building owner is a general taxpayer, requesting a formal electronic tax invoice is the principle. If the landlord refuses to issue a tax invoice fearing a tax increase, utilize the workaround of receiving a cash receipt for expense purposes via the National Tax Service's cash receipt system.

Bookkeeping and Filing Stages

Relentlessly record the monthly rent expenditure of 4 million won in the 'Rent' account subject of the simplified ledger. During the VAT filing period, aggregate tax invoices or cash receipts to report as input tax and proceed with refunds. Subsequently, during the May global income tax filing, aggregate these figures with the total 48 million won rent and other maintenance costs to finalize the net income amount; this is the correct sequence for tax optimization.