Why can repairing a damaged car still leave you with less cash?
A repaired-car offer may look much higher than an as-is purchase offer.
The difference is not profit until repair cost, selling fees, hidden-damage risk, post-repair price slippage, holding cost, alternative transport, and the timing of the cash receipt are all included.
This calculator compares both routes on a time-adjusted net-proceeds basis and shows the repaired sale price needed to break even with an as-is sale.
Sell as-is
Start with the higher of two valid written offers, subtract percentage and fixed selling costs, then adjust the delayed receipt and holding cost.
Repair then sell
Adjust the repaired conditional offer for expected slippage, then subtract repair, expected extra work, selling, holding, and transport costs.
Break-even quote
See both the final repaired sale price and the pre-slippage conditional offer required to match the as-is route.
Collect comparable written evidence first
Quotes taken on different dates or based on different disclosures cannot support a reliable decision.
Give each buyer the same vehicle number, mileage, accident scope, flood or fire history, and operability information, and try to obtain all quotes on the same day.
- Obtain two written as-is purchase offers and identify towing, storage, inspection, deregistration, or transfer deductions separately.
- Obtain an itemized repair estimate showing parts, labor, tax treatment, expected completion time, and the process for authorizing extra work.
- Disclose the same planned repair scope to two buyers and ask for conditional repaired-car offers with every post-inspection deduction condition stated.
- Copy monthly insurance, vehicle-tax equivalent, parking, financing, and daily alternative transport costs from your own records.
- Ask a qualified repair professional whether steering, braking, structural, and other safety-critical damage can be restored safely.
Match value-added tax treatment, towing distance, storage period, included work, and payment date before comparing prices.
A higher headline offer with more deductions may produce a lower net receipt.
How each input is interpreted
Two offers and selling deductions
The base scenario uses the higher valid offer and the conservative scenario uses the lower valid offer.
A commission is calculated as a percentage of the sale price, while a fixed selling cost is deducted once regardless of price.
With only one nonzero quote, the high and low values become identical and quote dispersion cannot be stress-tested.
Extra repair and price-slippage risk
Expected extra repair cost equals the possible extra amount multiplied by the probability you enter.
Expected price-slippage loss equals the higher repaired conditional offer multiplied by both the slippage rate and its probability.
These rates are not statutory values, official averages, or predictions from MowaTool.
Use the written deduction range, the repairer's risk explanation, and your personal downside tolerance.
Holding costs and discount rate
Monthly insurance, vehicle tax, parking, and financing costs are added and divided by 30 to create a daily holding cost.
The annual discount rate converts a later sale receipt into today's value.
Repair, holding, and transport spending is conservatively deducted in full instead of being discounted.
Net-proceeds formulas
As-is adjusted net proceeds
adjusted net =
(offer − commission − fixed cost)
÷ (1 + annual discount rate)receipt days ÷ 365
− daily holding cost × receipt days
Repair-route adjusted net proceeds
adjusted net =
(expected sale price − commission − fixed cost)
÷ (1 + annual discount rate)(repair + sale days) ÷ 365
− repair − expected extra repair
− holding − alternative transport
Why the calculator shows two break-even values
The final-sale break-even is the completed transaction price that makes the repair route equal the base as-is net proceeds after all entered costs.
The conditional-quote break-even reverses the expected slippage assumption so you can set a pre-repair negotiation threshold.
Both values are rounded upward to KRW 1,000 and checked so the immediately lower increment does not already satisfy the target.
Worked fictional example
The default values are a fictional arithmetic example, not a Korean damaged-car market average or a recommended assumption.
It uses as-is offers of KRW 11,500,000 and KRW 12,000,000, repaired conditional offers of KRW 16,200,000 and KRW 16,800,000, and a written repair estimate of KRW 3,800,000.
Repair takes 14 days, sale takes 7 days, monthly holding cost is KRW 350,000, and alternative transport is KRW 35,000 per repair day.
Fictional Korea damaged-car as-is versus repair-then-sell comparison| Measure | Sell as-is | Repair then sell |
|---|
| Base adjusted net | KRW 11,681,223 | KRW 11,213,691 |
| Expected cash receipt | D+3 | D+21 |
| Conservative adjusted net | KRW 11,188,881 | KRW 9,225,674 |
| Final repaired sale break-even | Not applicable | KRW 16,943,000 |
| Pre-slippage quote break-even | Not applicable | KRW 17,289,000 |
In this fictional base case, selling as-is is ahead by KRW 467,532.
The higher repaired conditional offer of KRW 16,800,000 is KRW 489,000 below the pre-slippage break-even quote of KRW 17,289,000.
The next step is to seek a lower documented repair cost or a stronger conditional offer before authorizing repair.
Read the conservative scenario as a liquidity stress test
A single expected value can hide the cash shortfall caused by a delayed repair or a reduced post-repair purchase price.
The conservative case uses the lower as-is offer for one route and the lower repaired offer with the full slippage rate for the other route.
It also charges the full possible extra repair amount and adds the entered delay to both holding and transport costs.
Same winner in both cases
The arithmetic preference is relatively robust within the entered range.
Safety, counterparty reliability, title transfer, and payment certainty still need independent review.
Winner changes under stress
The decision is sensitive to a small movement in price, cost, or time.
Narrow the extra-work authorization, deduction conditions, and delay liability in writing or obtain another comparable quote.
Korea-specific legal and official-source boundary
The official-law check was completed on September 1, 2026.
The current effective Automobile Management Act record was ID 001747 and MST 286989, while the Enforcement Rule record was ID 007928 and MST 286695.
Article 58 of the Act and Articles 120 and 134 of the Enforcement Rule were used only to define disclosure, performance-condition documentation, repair-estimate, repair-statement, authorization, and record-checking boundaries.
No statutory provision was converted into a purchase price, repair cost, slippage rate, or probability.
- Korean Automobile Management Act, Article 58 supports the transaction-disclosure and repair-document boundary used in the checklist.
- Enforcement Rule, Article 120 covers the used-vehicle performance and condition record process.
- Enforcement Rule, Article 134 supports checking repair estimates, repair statements, records, and authorization for extra work.
- Car365 used-car price reference is previous-month passenger-car reference information and may differ by institution, so it does not replace today's vehicle-specific written offers.
- NIST Handbook 135, 2025 Edition provides the life-cycle cost and present-value framework used as a methodology reference for timing adjustments.
A version of Article 58 scheduled to take effect on December 17, 2026 was visible in the official system.
The formulas contain no legal rate from that provision, but users should recheck the latest effective transaction guidance on or after that date.
Frequently asked questions
Should I enter an unrepaired insurance cash settlement?
This calculator does not determine insurance entitlement, fault allocation, or claim value.
Do not treat an unconfirmed insurance amount as a sale offer, and analyze a route-specific confirmed cash flow separately if it truly differs between routes.
Can I use the Car365 price as the repaired sale offer?
Use it only as a broad reference.
A vehicle-specific conditional offer that reflects disclosed accident scope, repair quality, mileage, location, and buyer deductions is the appropriate input.
What slippage rate and probability should I use?
There is no reliable universal percentage for every damaged vehicle.
Use the buyer's written deduction range, the repairer's hidden-damage assessment, and low, base, and high cases that reflect your own ability to absorb a loss.
Does a higher repair-route result mean I should repair immediately?
No.
Confirm safe restoration, a written conditional offer above the break-even threshold, authorization rules for extra work, payment timing, and enough liquidity to withstand delay before making the decision.
What if the two quotes are far apart?
First verify that both include the same disclosures, fees, tax treatment, towing, and payment terms.
If the spread remains large, treat it as decision risk and obtain a third comparable written quote to see which price can be reproduced.
Practical cautions
- Use vehicle-specific written offers instead of a highest price mentioned by phone.
- Separate parts, labor, paint, alignment, diagnostics, storage, and tax in the repair estimate.
- Measure repair days from intake to release and selling days from release to actual payment.
- Do not leave holding cost at zero merely because it is paid monthly rather than daily.
- Add financing cost if repair spending requires a card balance or an extended vehicle loan.
- Disclose flood, fire, and structural damage truthfully from the first quote request.
- The result does not calculate taxes, insurance claims, loan prepayment, litigation, or auction success.
Turn today's quotes into a decision record
Enter two as-is offers, one itemized repair estimate, and two repaired conditional offers.
If the base and conservative cases agree, record the supporting conditions.
If the repaired conditional offer is below break-even, renegotiate price or cost before authorizing work.