What is the Motor Insurance IDV & Depreciation Calculator?
A Motor Insurance IDV (Insured Declared Value) Calculator estimates the maximum sum your car or two-wheeler insurance policy will pay out if your vehicle is stolen or damaged beyond economical repair (a "total loss"). The IDV is not an arbitrary number — it is calculated using a standard depreciation schedule published by the IRDAI (Insurance Regulatory and Development Authority of India) under the Motor Tariff regulations, applied to your vehicle's current ex-showroom price based purely on its age.
Every comprehensive or own-damage motor insurance policy in India is anchored to an IDV, which directly determines two things: your maximum claim payout in a total-loss scenario, and your premium, since the own-damage premium is calculated as a percentage of IDV. A higher IDV means a higher premium but also a higher payout if the worst happens; a lower IDV (sometimes offered by agents to make a quote look cheaper) means lower premium but a real risk of being underinsured relative to your vehicle's actual replacement cost.
Many vehicle owners never actually check how their insurer arrived at the IDV figure on their policy schedule, simply accepting whatever the renewal quote states. This calculator lets you independently verify that figure using the exact IRDAI-mandated depreciation percentages, so you can catch a lowballed IDV before renewing, or use the correct figure to negotiate on premium.
How does it work?
IDV is calculated as: IDV = (Manufacturer's listed selling price, i.e. current ex-showroom price of the same or nearest equivalent model) − (Depreciation based on vehicle age, as per the IRDAI-prescribed schedule). The depreciation percentage is not linear — it is a fixed slab-based schedule set by the IRDAI Motor Tariff: 5% for vehicles up to 6 months old, 15% for 6 months to 1 year, 20% for 1 to 2 years, 30% for 2 to 3 years, 40% for 3 to 4 years, and 50% for 4 to 5 years.
Crucially, the ex-showroom price used is the current price of the same model in the year of renewal — not what you originally paid. If your car's model has been discontinued, insurers use the nearest equivalent model's current ex-showroom price. This is why IDV typically declines each year even though depreciation slabs alone would suggest a smaller drop: both the depreciation percentage increases and, for older models facing price inflation on newer variants, the base ex-showroom figure itself may shift.
For vehicles older than 5 years, the IRDAI schedule does not prescribe a fixed percentage — IDV is determined by mutual negotiation between the insurer and the insured, based on an inspection report and the vehicle's actual condition. Registration costs and insurance costs are excluded from the ex-showroom price used in this calculation, per IRDAI norms, since only the depreciable value of the vehicle itself is being insured.
Worked example
Consider Arjun, who bought a hatchback with an ex-showroom price of ₹8,00,000 in early 2024. He is now renewing his insurance policy in mid-2026, making the vehicle a little over 2 years old (28 months). Per the IRDAI schedule, a vehicle between 2 and 3 years old attracts 30% depreciation. IDV = ₹8,00,000 − (30% × ₹8,00,000) = ₹8,00,000 − ₹2,40,000 = ₹5,60,000. If the model's current ex-showroom price has since risen to ₹8,50,000 (a common occurrence given periodic price hikes by manufacturers), Arjun's insurer would apply the same 30% depreciation to the current price instead, giving IDV = ₹8,50,000 − ₹2,55,000 = ₹5,95,000 — meaning Arjun's IDV can actually rise slightly at renewal in an inflationary pricing environment, despite the car itself being a year older.
If Arjun's agent instead quotes an IDV of ₹4,80,000 to lower his premium, he can immediately spot the discrepancy using this calculator and ask the insurer to correct it — an underinsured IDV would shortchange him by roughly ₹80,000 in a genuine total-loss claim, since insurers pay out (IDV − compulsory deductible − salvage value), not the vehicle's true replacement cost.
When to use this calculator
- 1Renewing your comprehensive motor insurance policy each year, to independently verify that the IDV your insurer has quoted matches the IRDAI-prescribed depreciation schedule applied to the current ex-showroom price of your vehicle model.
- 2Comparing quotes from multiple insurers for the same vehicle, since a lower premium quote sometimes hides a lower IDV — this calculator lets you normalise quotes to the same IDV baseline before comparing which insurer is genuinely cheaper for equivalent coverage.
- 3Deciding on a settlement amount after a total-loss claim (theft or irreparable accident damage), to sanity-check the insurer's offered settlement against the IDV that should apply for your vehicle's exact age at the time of the incident.
- 4Estimating your car loan's protection gap — if you have an outstanding car loan larger than your vehicle's current IDV (common in the first 2–3 years of a loan due to faster loan amortisation lag versus depreciation), you may need GAP insurance to cover the shortfall in a total-loss scenario.
- 5Deciding whether to opt for a voluntary higher IDV declaration at renewal (some insurers allow up to 5% above the standard schedule with justification) if you have added significant accessories or want a higher payout ceiling in exchange for a marginally higher premium.
Common mistakes to avoid
- ✕Accepting a lowballed IDV from an agent or insurer without checking it against the actual IRDAI depreciation schedule — a lower IDV reduces your premium slightly but shortchanges you significantly in a genuine total-loss claim, since claim payouts are capped at the declared IDV.
- ✕Assuming IDV is the same as the vehicle's current market resale value — IDV is a formula-based insurance figure using ex-showroom price and a fixed depreciation slab, and can differ meaningfully from what you could actually sell the car for in the used-car market.
- ✕Using the original purchase price instead of the current ex-showroom price of the same or equivalent model when estimating IDV — insurers always use the current year's ex-showroom price, which may be higher or lower than what you originally paid due to price revisions.
- ✕Not accounting for registration and insurance costs being excluded from the ex-showroom price used in the IDV calculation — only the depreciable ex-showroom value of the vehicle itself (excluding RTO registration charges, road tax, and insurance premium) is used as the base figure.
- ✕Forgetting that for vehicles older than 5 years, IDV is not calculated from a fixed schedule at all but is negotiated based on an inspection report — owners of older vehicles sometimes wrongly extrapolate the 50% depreciation slab from year 5, when in reality the figure requires a fresh assessment each year beyond that point.
Frequently asked questions
- What is IDV in car insurance and why does it matter?
- IDV (Insured Declared Value) is the maximum amount your insurer will pay if your vehicle is stolen or damaged beyond economical repair. It is calculated as the current ex-showroom price of your vehicle (or nearest equivalent model) minus depreciation based on the vehicle's age, per the IRDAI-prescribed Motor Tariff schedule. IDV matters because it directly caps your total-loss claim payout and is also the base on which your own-damage insurance premium is calculated — a percentage rate applied to IDV.
- What is the IRDAI depreciation schedule used to calculate IDV?
- The IRDAI Motor Tariff prescribes fixed depreciation slabs based on vehicle age: 5% for vehicles up to 6 months old, 15% for vehicles between 6 months and 1 year, 20% for 1 to 2 years, 30% for 2 to 3 years, 40% for 3 to 4 years, and 50% for 4 to 5 years. Beyond 5 years, there is no fixed percentage — the IDV is determined by mutual agreement between insurer and insured based on the vehicle's inspected condition.
- Can I increase or decrease my car's IDV at renewal?
- Yes, within limits. Most insurers allow you to declare an IDV within a band around the IRDAI-calculated standard figure, sometimes up to 5% higher with justification (such as recently added accessories) or lower if you specifically want a reduced premium. However, declaring an artificially low IDV to save on premium is generally inadvisable, since it directly reduces your maximum claim payout in a total-loss scenario — the premium savings are typically small relative to the claim shortfall risk.
- Does a higher IDV mean a higher insurance premium?
- Yes. The own-damage component of your comprehensive motor insurance premium is calculated as a percentage rate (varying by insurer and vehicle category) applied directly to the IDV. A higher IDV therefore increases your own-damage premium, but also increases your maximum payout in a total-loss claim. The third-party liability premium component, in contrast, is fixed by IRDAI and is completely independent of your vehicle's IDV.
- Why did my car's IDV go up this year even though the car got older?
- This can happen when the current ex-showroom price of your vehicle's model has increased since your last renewal, due to a manufacturer price hike, a GST or cess change, or a new-generation model replacing the old one at a higher price point used as the equivalent benchmark. Since IDV = current ex-showroom price × (1 − depreciation%), a large enough rise in the base ex-showroom price can outweigh the effect of the depreciation percentage increasing with vehicle age, occasionally producing a higher IDV at renewal than the previous year.