Compare repeated one-time pest treatment and a regular Korean service contract in KRW using recurrence scenarios, revisit warranty, scheduled and response visits, commitment, exit cost, cleanup, household time, and present value.
All price defaults start at zero. Load the fictional example or enter written quotes and contract terms.
Start with the same pest, area, spaces, and recurrence scenario.
Use the same rooms and attached spaces for both quotes.
The planned occupancy or service period.
A planning scenario after the first treatment, not a biological forecast.
Your rate for converting future costs to present value.
Hourly value of moving, sealing, waiting, and restoring the space.
Enter first and repeat charges plus a revisit warranty that resets after each paid treatment.
The first treatment quote paid at month zero.
The treatment charge after warranty coverage is unavailable.
Travel or distance charge added to each paid visit.
Confirmed months from the most recent paid treatment.
Free revisits reset by each paid treatment.
Sealing, disposal, or extra-space work outside the quote.
Household time incurred even for a warranty revisit.
Laundry, bags, supplies, and post-treatment cleanup.
Your scenario for future repeat-treatment prices.
Enter monthly, scheduled-visit, response, commitment, and exit terms.
Non-refundable enrollment or intensive initial service.
Base fee paid throughout the analysis period.
Planned preventive visits stated in the contract.
Per-visit charge outside the monthly fee.
Annual response visits included without an extra visit charge.
Charge for a response beyond the annual allowance.
Extra-space, repair, or disposal work outside the contract.
The binding term shown in the contract.
Enter only the amount from the contract or an exit statement.
Removal, closure, or restoration at the final month.
Household time for every scheduled and response visit.
Cash cleanup and supply cost for every visit.
Your renewal scenario for recurring and visit charges.
The numeric leader stays locked until every comparison condition is confirmed.
A monthly pest-management price and a one-time treatment quote rarely cover the same cash flows. A one-time option may require another paid treatment after the revisit warranty expires, while a regular contract can include setup, monthly, scheduled-visit, excess-response, early-exit, and end charges. This calculator lays those events onto one monthly timeline and compares nominal total cost, present-value total cost, and equivalent monthly cost.
It is a quote-driven planning tool. Every market-price field starts at zero, and the optional fictional example is not a Korean market average, provider tariff, recurrence forecast, or recommendation. Use written quotes for the same pest, floor area, rooms, preparation scope, cleanup responsibility, and VAT basis.
Both alternatives should identify the same target pest, rooms, attached spaces, area, tax basis, furniture movement, sealing work, disposal, and post-treatment cleanup. If one quote covers a kitchen and bathroom while another includes a balcony, storage room, or common area, the cost gap measures scope rather than the contract structure.
The interface requires both pest-coverage checks, both written quotes, matched scope, warranty terms, contract terms, and provider or product evidence. Until all eight checks are complete, the totals remain visible for input review but the lower number is not presented as a decision-ready option.
| Group | Inputs | Evidence | Model range |
|---|---|---|---|
| Common | Area, horizon, recurrence, discount, time value | Floor plan, occurrence log, household schedule | 6–60 months |
| One-time | First, repeat, travel, warranty, excluded work | Written quote and revisit warranty | 0–24 warranty months |
| Regular | Setup, monthly, scheduled, response, term, exit | Contract and exit statement | 1–60 contract months |
| Safety | Provider and product evidence check | Filing, product identity, approval, label, safety data | Yes or no |
Annual recurrences mean additional response events after the initial treatment. The input is not an infestation diagnosis or treatment-success probability. When the future is uncertain, compare the fixed low, base, and high rows rather than relying on a single point estimate.
The first paid treatment occurs at month zero and opens a warranty window. A recurrence is warranty-covered when it falls within the confirmed number of months from the most recent paid treatment and an included revisit remains. Treatment, travel, and excluded-work charges are then zero, but preparation time and cleanup still occur. A recurrence outside the window, or after the allowance is exhausted, becomes a new paid treatment and starts a new warranty window.
Scheduled visits are spread evenly across the analysis horizon. Each can carry a per-visit fee, cleanup cost, and household time. Recurrence-response visits are counted separately. Within each 12-month block, visits up to the confirmed allowance do not add an extra response charge; later visits add that charge. Excluded work, cleanup, and household time can still apply to every recurrence.
Monthly discount rate = (1 + annual rate)^(1/12) − 1
Present-value total = month-zero cost + Σ monthly cost ÷ (1 + monthly rate)^t
Equivalent monthly cost = level monthly amount with the same present value
Recurrence break-even = smallest annual recurrence count where the regular PV remains no higher at every larger tested count
The timing and present-value structure follows the life-cycle-costing principles in NIST Handbook 135e2025, DOI 10.6028/NIST.HB.135e2025. The calculator does not import United States federal discount rates, energy indices, procurement rules, or cost-effectiveness thresholds. The annual discount and quote-growth rates are editable planning assumptions.
The example uses an 84 m² home, 24 months, four recurrences per year, a 3% annual discount rate, and household time valued at KRW 25,000 per hour. The one-time option uses KRW 180,000 initially, KRW 140,000 for a repeat treatment, KRW 10,000 paid-visit travel, a three-month warranty with one included revisit, KRW 20,000 of excluded work per paid event, 1.5 preparation hours, and KRW 15,000 cleanup per visit. The regular option uses KRW 80,000 setup, KRW 39,000 monthly, six scheduled visits per year, two included response visits per year, KRW 70,000 for each extra response, KRW 10,000 excluded work per recurrence, a 24-month term, 0.75 preparation hours, and KRW 5,000 cleanup per visit.
The fictional one-time option is lower by KRW 480,227 in present value. The persistent regular-contract break-even is 12 annual recurrences, and the break-even regular monthly fee under the base recurrence scenario is KRW 18,753. The low, base, and high rows use two, four, and six annual recurrences. These figures demonstrate the model only; different warranty terms, response allowances, preparation time, and actual quotes can reverse the comparison.
Set the horizon to the actual remaining occupancy. If it is shorter than the contract term, enter only the exit amount confirmed in the contract or a provider exit statement. The calculator does not invent a statutory cancellation percentage.
Enter both warranty months and the visit allowance. Even a free revisit can require furniture movement, sealing, laundry, waiting, and cleanup, so household time and cleanup remain in the cash flow.
Bed-bug or rodent work can involve substantial preparation or excluded structural work. Use provider instructions and actual household records. The calculator does not prescribe treatment, product dosage, ventilation, re-entry time, protective equipment, or disposal.
Separate an individual dwelling quote from any statutory disinfection duty managed by a building operator. Covered facilities, management responsibility, and provider-filing requirements can depend on the site and should be checked with the competent Korean authority.
This page uses KRW and Korean official-source boundaries. It does not provide legal, public-health, chemical-safety, or treatment advice, and it does not determine whether a particular household, facility, provider, product, cancellation, or refund satisfies Korean law.
The current search result was law ID 001792, master sequence 280445, effective June 24, 2026. Articles 51, 52, and 54 address safe disinfection and control of rodents or sanitary pests, disinfection-business filing, required methods, and records. The calculator does not decide whether ordinary household pest service is statutory disinfection, whether a facility is covered, or whether a provider filing is required.
The current search result was law ID 013098, master sequence 282555, effective July 1, 2026. Article 20 addresses biocidal-product approval and safety, health, environmental, and efficacy criteria. Article 35 prohibits sales and related handling of specified unapproved or improperly labeled products. The calculator does not verify approval, approved purpose, dose, protective equipment, ventilation, re-entry, child or pet safety, or mixture compatibility.
The current administrative rule was rule ID 36810, serial number 2100000270136, Fair Trade Commission Notice 2025-14, effective December 18, 2025. The Korea Consumer Agency explains that the standards support settlement or recommendation when the parties have not expressed a different method. Because pest-control contracts can differ in classification and terms, the model uses only the actual exit amount supplied by the user and does not calculate a legal cancellation rate or refund right.
No. Area, pest, severity, scope, warranty, and contract terms differ too much for a defensible nationwide default. Every price starts at zero.
Use recent occurrence records and a provider treatment plan as planning evidence. When uncertain, compare the fixed low, base, and high rows and note where the decision changes.
Treatment, travel, and excluded-work charges are zero only when the confirmed warranty applies. Household preparation time and cleanup still apply to every visit.
No. Enter only the amount stated by the contract or a provider exit statement. Contract classification, enforceability, cancellation rights, and refunds remain external review questions.
No. The threshold compares modeled cost only. Response coverage, treatment scope, safety information, inconvenience, and provider performance require separate review.
No. A checkbox records the user review only. Official records, product information, provider documents, and the competent authority must be used for any legal or safety verification.
Official Korean sources were checked on September 2, 2026. Recheck the current master sequence, biocidal-product transition rules, administrative standards, and provider or product lookup procedures whenever the governing materials change.
Match the pest, area, preparation, cleanup, warranty, and commitment. Then enter the actual amounts to reveal omitted costs, recurrence sensitivity, and the break-even monthly fee. Take the result back to each provider and request written confirmation of revisit, response, exit, and product-information terms.