Is the maturity buyout really cheaper than returning the car?
At the end of a South Korean long-term vehicle-rental contract, the customer may have a contractual option to buy the vehicle or return it and arrange another car. A buyout quote can look attractive when it is below an advertised used-car price, but that comparison omits transfer costs, immediate repairs, insurance, vehicle tax, maintenance, and future depreciation. A return is not automatically cost-free either: restoration, excess mileage, inspection, delivery, and a replacement contract can create substantial cash outflows.
This calculator treats rent already paid as a sunk cost and compares only cash flows from the maturity decision date. It places buyout, return and rent a replacement vehicle, and an optional renewal quote on common one-, three-, and five-year timelines. The outputs include nominal cost, present-value cost, equivalent monthly cost, market-value sensitivity, and the current used-car offer at which buyout breaks even with the best quoted alternative.
Every default amount is a fictional planning example. It is not a Korean market average, a vehicle valuation, or a quote from a rental provider. Replace every amount with the signed contract, maturity settlement, pre-return inspection, dated purchase offers, and like-for-like replacement or renewal quotations.
Five questions the model can answer
- How much net cash is required to buy the existing vehicle at maturity?
- Which quoted option has the lowest one-, three-, and five-year present value?
- Does a real renewal quote change the ranking?
- At what current used-car offer does the buyout stop being economical?
- Which contract, inspection, and quotation facts should be confirmed next?
Put every option on the same boundary
Buyout means paying the maturity settlement, owning the vehicle during the analysis horizon, and receiving an estimated resale value at the end. Return and replace means settling the old vehicle and beginning a new long-term rental. Renewal is an optional third alternative and should be enabled only when a written quote exists. These choices provide continued mobility but have different payment timing and end assets, so a common base date and study period matter.
Cost boundaries for buyout, return and replacement, and renewal| Option | Initial cash | Recurring cost | End treatment |
|---|
| Buy out | VAT-inclusive buyout, transfer costs, repairs, less settlement credit | Insurance, vehicle tax, maintenance, and other ownership costs | Estimated depreciated resale value is credited |
| Return and replace | Old-car net return settlement plus new initial fee and deposit | Replacement rent and annual exclusions | End charge less the refundable deposit |
| Renew current vehicle | Renewal initial fee and deposit less existing settlement credit | Renewal rent and annual exclusions | End charge less the new refundable deposit |
Do not add rent already paid
Past rent that cannot be recovered is the same sunk cost whichever maturity option is chosen. Include an old amount only when a missed payment, breach, or other documented item becomes part of the maturity settlement. Put that confirmed amount in the relevant buyout additional cost or other return settlement input.
Collect four evidence sets before entering numbers
Contract and maturity notice
Mark the buyout right, quoted amount, VAT wording, notice deadline, deposit or advance-payment treatment, and responsibility for registration and transfer expenses. Ask the provider for written clarification when the maturity notice and signed contract do not match.
Pre-return inspection
Obtain itemised findings for body panels, glass, wheels, tires, interior, accident repairs, excess kilometres, and the contractual kilometre rate. Keep photographs, the inspection sheet, repair estimates, and the stated normal-wear boundary.
Dated used-car purchase offers
Use at least two offers that reflect the actual odometer, condition, and accident or repair record. Dealer retail advertisements are not equivalent to an amount someone will pay for this vehicle today. Enter a low, central, and high offer as conservative, base, and optimistic scenarios.
Replacement and renewal quotes
Separate deposits from advance rent and non-refundable fees. Match the insurance, maintenance, consumables, annual mileage, refund conditions, and end settlement. A smaller monthly fee is not a fair comparison when the coverage or vehicle scope differs.
How to enter the maturity settlement
Contract buyout quote and VAT
Enter the vehicle purchase amount shown in the contract or maturity notice. Leave the VAT-included box selected when the displayed total already includes VAT. Clear it only when the written quote expressly says VAT is extra. The calculator then adds 10 percent as a convenience based on Article 30 of the Korean Value-Added Tax Act, but the actual invoice and taxable treatment must be confirmed from the transaction documents.
Acquisition costs and immediate repairs
Include title transfer, registration, plates, agency charges, and other cash costs caused by the buyout. Enter tires, battery, consumables, body work, or other unavoidable near-term maintenance separately so they are not hidden in the annual maintenance estimate or counted twice.
Deposit and advance-payment settlement
Put an amount that reduces the buyout invoice in buyout settlement credit. Put cash expected back after return in return settlement refund. The same original deposit may appear in alternative scenarios, but the contractual treatment can differ by choice. Adjust conservatively when the timing is delayed or deductions remain uncertain.
Restoration, mileage, and other return charges
Enter restoration supported by the inspection and calculate excess mileage from the contractual rate and expected excess distance. Keep inspection, collection, delivery, and miscellaneous settlements separate. When damage remains uncertain, run a lower and higher restoration amount and check whether the preferred option changes.
Current market offers and post-buyout ownership
The base purchase offer less buyout initial cash is shown as immediate buyout equity. It is useful, but it is not the whole decision. Once the car is owned, the user pays costs that may have been bundled into rent. The model spreads entered annual insurance, vehicle tax, maintenance, inspection, consumables, and other ownership costs evenly across twelve end-of-month cash flows.
Three current purchase offers
Use a lower quick-sale or adverse-condition offer, the most defensible base offer, and a higher offer that remains obtainable for the same vehicle. The calculator reorders values into ascending conservative, base, and optimistic positions and displays a warning if the entered order differs.
Annual depreciation assumption
Future resale equals the current purchase offer compounded by the same annual depreciation rate. Test several rates that reflect model, age, mileage, accident history, warranty, and demand. This is a sensitivity assumption, not a prediction of a future transaction price.
Insurance and vehicle tax
Use an insurance quote based on the actual driver, history, coverage, and deductibles. Enter vehicle tax from the appropriate Korean notice or a separate vehicle-specific calculation. Do not assume the old rental company's insurance cost becomes the owner's premium.
Maintenance and other ownership cost
Build a yearly reserve for inspections, fluids, filters, tires, battery, wear items, and plausible repair. Leave parking or washing out when the same expense would occur under every option. The comparison should focus on costs that change because the vehicle is owned.
Match replacement and renewal quote scope
A low monthly rental fee can be offset by a large deposit, non-refundable start charges, uncovered insurance or maintenance, and end settlement. The model records a deposit as an initial outflow and credits only the selected refundable percentage at the horizon end. A fully refunded deposit can therefore still carry a present-value cost while the cash is tied up.
Replacement and renewal quotation inputs and evidence| Input | What to include | Evidence |
|---|
| Non-refundable initial cost | Contract, delivery, registration, or start charges not returned | Quotation and first invoice |
| Deposit and refund rate | Cash paid now and the realistically refundable share | Deduction, set-off, timing, and refund clauses |
| Monthly fee | Recurring amount assumed across the selected horizon | Payment schedule and promotion expiry |
| Annual exclusions | Insurance, maintenance, or consumables paid outside rent | Included-service limits and deductibles |
| End settlement | Expected return, restoration, collection, or end fee | Maturity and return provisions |
Exclude renewal when there is no real quote
An invented renewal monthly fee can distort the second-best option and the break-even market value. Clear the renewal checkbox until a written offer is available. Then separate any existing deposit settlement from the new deposit and enter the actual renewal scope.
Cash-flow and present-value formulas
Calculations use Korean won and round only the displayed outputs. The effective annual discount rate is converted to a monthly effective rate. Recurring costs occur at each month end, while resale, end settlements, and deposit refunds occur at the selected horizon end.
VAT-inclusive buyout = buyout quote + quote × 10% only when VAT is extra
buyout initial cash = VAT-inclusive buyout + acquisition + repairs − credit
return net settlement = restoration + mileage + return fee + other − refund
future resale = current purchase offer × (1 − annual depreciation)years
monthly discount rate = (1 + annual discount rate)1/12 − 1
PV cost = initial cash + PV of monthly costs + PV of terminal net cost
Buyout terminal cost is negative because a future resale is a cash inflow. Rental terminal cost equals the end charge less the refundable deposit. The saving is the present-value gap between the lowest-cost and second-lowest-cost active alternatives. Differences below half a won are treated as a displayed tie. Equivalent monthly cost is a comparison annuity, not the provider's invoiced monthly fee.
Reading the fictional worked example
The illustrative defaults use a KRW 16,000,000 buyout quote, KRW 1,500,000 of acquisition and immediate repair costs, a KRW 2,000,000 buyout credit, and a KRW 18,000,000 base current purchase offer. Annual ownership cost is KRW 2,400,000, annual depreciation is 12 percent, and the annual discount rate is 3 percent. Replacement and renewal inputs are equally fictional and exist only to make the formula auditable.
One-, three-, and five-year present values for the illustrative defaults| Horizon | Buyout PV | Return and replace PV | Renewal PV | Lowest | Saving vs second |
|---|
| 1 year | KRW 2,483,324 | KRW 7,724,059 | KRW 5,313,950 | ★ Buy out | KRW 2,830,626 |
| 3 years | KRW 11,155,932 | KRW 23,077,852 | KRW 18,352,237 | ★ Buy out | KRW 7,196,306 |
| 5 years | KRW 18,447,550 | KRW 37,550,275 | KRW 30,642,073 | ★ Buy out | KRW 12,194,524 |
Why this example favours buyout
Buyout is lowest in all three fictional horizons, but that is not a general market conclusion. The base case credits a KRW 12,266,496 resale value after three years. A lower real purchase offer, faster depreciation, higher repair cost, or cheaper replacement and renewal quote can change the ranking.
Break-even market value and sensitivity
Break-even current market value is the current purchase offer that makes buyout equal to the cheaper of return-and-replace and renewal, holding every other input fixed. A real base offer above the threshold supports buyout under those assumptions; an offer below it can support the quoted alternative. A negative algebraic threshold is displayed as zero. At 100 percent annual depreciation, future resale is always zero and no current-market threshold can be inferred.
Three market-offer rows
The calculator reruns the three-year buyout for conservative, base, and optimistic current offers. In the fictional defaults, the three buyout present values are KRW 12,403,219, KRW 11,155,932, and KRW 9,908,645 respectively. Review both the winner and the shrinking or expanding difference.
Challenge depreciation and maintenance too
Market-offer sensitivity does not replace uncertainty in depreciation, repairs, or replacement rent. When buyout wins, increase depreciation and ownership costs. When return wins, increase replacement rent and end settlement. A robust decision should not reverse after one modest change.
A practical maturity workflow
- Secure the notice deadline: confirm maturity, automatic renewal, notice date, method, and contractual buyout right.
- Request an itemised buyout settlement: reconcile buyout price, VAT, transfer costs, deposit, and advance-payment credit.
- Arrange a pre-return inspection: obtain photographs, findings, restoration estimates, excess distance, and unit rate.
- Collect same-day purchase offers: disclose the same condition and history to at least two buyers.
- Align replacement scope: match vehicle class, deposit, rent, insurance, maintenance, mileage, and end terms.
- Read every horizon: check whether the winner changes and whether initial cash remains affordable.
- Save evidence and notify in writing: retain contract pages, inspection, offer dates, and entered assumptions before acting.
Common decision scenarios
Good condition and low mileage
A strong real purchase offer and modest repair outlook can support buyout. Verify with an executable offer, not a retail advertisement, and test the depreciated resale value rather than assuming today's gap persists.
Damage, repairs, or excess mileage
Return charges may rise, but the same condition can reduce a purchase offer. Increasing restoration while leaving market value at an undamaged figure overstates the buyout benefit. Use the same vehicle facts on both sides of the comparison.
Insufficient cash for buyout
The lowest present value is not executable when the initial cash cannot be funded. Add expected loan interest and fees to the ownership plan or model financing separately, then review monthly liquidity alongside economic cost.
Likely vehicle change within a year
Give the one-year result and near-term depreciation greater attention. If the replacement rental has a longer mandatory term, the one-year table does not invent an early-termination settlement. Obtain a horizon-matched quote and enter its real end cost.
South Korean legal and contract boundary checked for 2026
Article 31 of the Passenger Transport Service Act requires a vehicle-rental business to establish and report rental terms and delegates required contents to subordinate rules. It does not provide one universal buyout price, residual value, deposit treatment, restoration charge, or excess-mileage settlement for this calculator. The signed contract and actual settlement documents control the commercial inputs.
Standard terms are a documentation reference
The Korea Fair Trade Commission's 2021 revision summary for Standard Terms No. 10064 highlights detailed vehicle checks at handover and return and access to repair documentation. Article 19-3 of the Act on the Regulation of Terms and Conditions permits the Commission to establish and recommend standard terms and requires differences to be made easy to see when a business uses different terms. The standard terms do not automatically set every long-term rental maturity buyout or restoration charge.
Disputes and tax treatment need individual review
Normal wear, term validity, buyout exercise, deposit deductions, invoicing, and business tax treatment depend on documents and facts. Keep the contract, photographs, inspection, and charge basis. For a material dispute or tax question, seek guidance from the competent Korean body or a qualified professional. This calculator is not legal, tax, valuation, or vendor advice.
Tips, warnings, and model limits
Improve the evidence
- Record each quote's validity date and VAT wording.
- Use the same condition and odometer in return and market-value inputs.
- Separate deposits, advance payments, refunds, and set-offs.
- Rerun higher and lower depreciation, repair, and monthly-rent assumptions.
- Read initial liquidity alongside present-value cost.
Not priced automatically
- Buyout-loan interest, fees, prepayment cost, or credit effects
- Accident risk, insurance renewal changes, or major unexpected repair
- Vehicle preference, safety, convenience, and quality differences
- Business-specific tax deductions and cash-tax effects
- Early termination when the actual quote does not match 1, 3, or 5 years
The present-value approach follows the general life-cycle-cost principle of comparing alternatives over a common study period and discounting costs to a common base date. NIST Handbook 135e2022 is a methodology reference, not a source of Korean rental prices, depreciation, discount rates, or contract terms.
Frequently asked questions
Should I always buy when the current offer exceeds the buyout quote?
No. Add acquisition costs, immediate repairs, insurance, tax, maintenance, and future depreciation, then compare the same horizon with return and a replacement vehicle. The current offer must also reflect this exact car.
What if I do not know whether VAT is included?
Do not guess. Check the contract, maturity notice, total quotation, and invoice conditions with the provider. The 10 percent toggle exists only for a written quote that explicitly states VAT is extra.
Where should I enter the existing deposit?
Use buyout settlement credit when it reduces the buyout invoice and return settlement refund when cash comes back after return. If it rolls into a renewal or can be deducted, enter only the amount actually treated under each alternative.
What if the restoration charge is not known yet?
Request a pre-return inspection and the contractual normal-wear standard. Until the amount is confirmed, run a lower and higher charge and identify the point where the preferred option changes. Do not treat the result as final before the evidence arrives.
What if the actual contract term differs from the table horizon?
The table assumes the same monthly and end terms remain available for each displayed period. When one-, three-, or five-year quotes differ, rerun the relevant written quote and record that horizon-specific assumption.
Is the lowest present value always the right decision?
No. Liquidity, reliability, safety, convenience, replacement need, and contract risk may matter outside the monetised inputs. Use the output to expose assumptions that need stronger evidence, not as an automatic command.
Official sources and review date
Official current-history records and guidance were checked on August 22, 2026. They define the legal, tax-display, inspection, and methodology boundaries only. They do not supply the fictional buyout, market values, restoration cost, monthly rent, depreciation, or discount rate.
- Passenger Transport Service Act, Article 31 — National Law Information Center ID 001749, checked MST 286391, current search record effective July 1, 2026
- Value-Added Tax Act, Article 30 — ID 001571, MST 276117, current record effective January 2, 2026
- Act on the Regulation of Terms and Conditions, Article 19-3 — ID 000667, MST 260021, current record effective August 7, 2024
- Korea Fair Trade Commission Standard Terms No. 10064 — automobile-rental terms revised October 29, 2021
- Korea Consumer Agency rental-car handover and return guidance — contract checks, condition records, and repair-document reference
- NIST Handbook 135e2022 — common study period and discounted life-cycle-cost methodology
Replace every fictional default with written evidence
Gather the maturity notice, pre-return inspection, same-day used-car offers, and comparable replacement and renewal quotes. Read initial cash, one-, three-, and five-year present value, break-even market value, sensitivity, and warnings together before sending the contractual notice on time.