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Motor Insurance NCD Claim-Impact Calculator

Compare the future cost of paying for a repair privately with making an insurance claim under the NCD schedule, underlying premiums, non-NCD charges, excess, coverage and caps you enter. The result is a neutral illustration, not a fault decision, quotation, underwriting prediction or recommendation.

✓ Results shown free✓ Dated source references✓ General information only

GIA common illustration · method v1.0.0 · verified 11 Sep 2026

Compare the future cost of paying for one repair privately with making a claim, using only the premiums, NCD treatment and policy terms you enter.

Calculated in this active browser session. Do not enter an accident narrative, photo, plate, policy number, insurer name, driver identity or exact location. Private values are not sent to analytics or placed in URLs.

1. Current NCD and schedule
2. Premium basis and renewals
Year-by-year NCD and premium assumptions
RenewalPrivate baseClaim basePrivate chargesClaim charges
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3. Repair and policy treatment

insurerPayment = min(max(eligibleRepair − excess, 0), confirmedPaymentLimit)

Methodology and boundaries

The GIA common illustration is used only for private-car NCD. At the first renewal, the no-claim path steps up by 10 points to the 50% cap, while the claim path first applies the initial claim reduction; recovery occurs only in later years under the explicit no-further-claims assumption. Custom mode uses only your entered schedule.

premiumPayable = eligible base × (1 − NCD rate) + non-NCD charges

An already-paid current premium is a common sunk cost unless you enter genuine unequal adjustments.

Worked example

Fictional example: current NCD 50%, S$2,000 eligible base in each of three renewals, zero charges, one claim, S$600 excess and a fully eligible S$1,000 repair. Private-path premiums total S$3,000 and the path totals S$4,000. Claim-path premiums are S$1,600, S$1,400 and S$1,200, totalling S$4,200; that path totals S$4,800. The simple break-even is S$1,800.

Limitations

  • Does not determine accident fault or third-party liability.
  • Does not predict quotations, underwriting, renewal or insurer decisions.
  • Does not replace the insurer, policy wording, authorised workshop or reporting requirements.
  • NCD protection may not transfer and does not guarantee an unchanged base or final premium.

Frequently asked questions

Must I report after a private settlement?

Accident reporting and making an insurance claim are separate decisions. Under the Motor Claims Framework, accidents should be reported to the insurer within 24 hours or by the next working day, including where a private settlement is made. Check your insurer’s instructions.

Why not reverse the eligible base from my final premium?

Because non-NCD charges, discounts and underwriting adjustments may not receive NCD. Without a breakdown, a reverse-derived value is not an exact fact.

Will the result tell me whether to claim?

This is a neutral cost comparison, not a recommendation to claim or settle privately.

Official sources

Verified 11 September 2026. The GIA illustration is not an insurer-specific guarantee.

View Singapore car-cost rules data

Clear outputs

What this tool will show

Each result stays connected to the inputs and rules used.

  • 01Complete private-repair and claim-path totals with their absolute difference
  • 02Immediate cash, modelled insurer payment and extra future premiums
  • 03Simple repair-cost break-even only where the supported terms make it valid
  • 04Accessible year-by-year NCD, premium and cumulative-total ledger
  • 05Reporting reminder, assumptions, limitations and reviewed insurance-budget handoff
Transparency standard

The workings stay visible from day one.

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Official rules

Applied parameters include a source and verification date.

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Assumptions

User inputs and defaults are clearly separated.

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Limits

Scope and exclusions appear beside the result.

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interest.sg provides general information, dated reference data and calculation tools. Results are estimates—not financial, investment, legal, tax, property, valuation, CPF, HDB, lending, insurance or protection advice. Verify material decisions with the relevant authority or a qualified professional.

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