Choosing a limit of indemnity: AOA and AOY limits for Indian liability policies

Set the any-one-accident (AOA) limit at no less than the largest claim a single realistic accident could produce, including compensation for death or serious injury, third-party property damage and legal defence costs if they fall inside the limit, and never below what client contracts require. Then set the any-one-year (AOY) aggregate high enough for more than one serious claim in a year, commonly two to four times the AOA for businesses with many sites, products or contracts. Higher limits usually cost proportionally less per lakh of cover, so the premium difference between an adequate and an inadequate limit is often small compared with the gap it closes.

This guide belongs to the liability insurance buying checklist. All figures are illustrative. The limit interacts with the deductible, covered in choosing a deductible.

AOA and AOY in plain terms

• AOA (any one accident), sometimes called per occurrence: the maximum the insurer pays for all claims arising from one accident or event
• AOY (any one year), the aggregate: the maximum the insurer pays for all accidents in the policy year combined
• Sub-limits: lower caps within the main limit for specific heads, for example food poisoning, pollution, or products
• Ratio: the AOA:AOY ratio, for example 1:1 means one full-limit claim exhausts the year; 1:2 means two

Example of exhaustion

A policy with ₹50 lakh AOA and ₹50 lakh AOY (1:1) pays a ₹45 lakh claim in June. In October a second accident produces a ₹30 lakh claim. Only ₹5 lakh of aggregate remains, so the business pays ₹25 lakh plus its deductible. With ₹50 lakh AOA and ₹1 crore AOY (1:2), the October claim would have been paid in full, less the deductible.

A five-step sizing method

Step 1: list your worst realistic scenarios

Do not choose the theoretical maximum (everything burns down at once), but do not choose the average claim either. Think about the most serious event that could plausibly happen in your business:

• Shop or restaurant: a fire spreading to neighbouring premises; a customer seriously injured
• Factory: an explosion injuring passers-by and damaging adjoining units
• Contractor: damage to a client's plant or a serious injury at a client site
• Product maker: a defect affecting many customers at once

Step 2: estimate each component

Courts in India, especially motor accident tribunals, have developed the multiplier method for death and injury compensation, and awards in commercial cases can be higher where the injured person had high earnings. A lawyer can help you estimate a realistic figure for your sector.

Step 3: check contracts and tenders

List the minimum limits that clients, landlords, mall operators, airports, ports or government tenders require. The AOA must meet the highest of them, and some require the limit to be "per occurrence" with no aggregate below a stated figure. See insurance clauses in contracts.

Step 4: choose the aggregate

Step 5: price two or three limits

Ask each insurer for the same policy at two or three limits. Then calculate the marginal cost of each step:

With GST, moving from ₹50 lakh to ₹1 crore costs ₹11,000 × 1.18 = ₹12,980 a year. The quote comparison tool shows how much each option would leave you to pay in your Step 2 scenario.

The worked decision

Our Step 2 scenario is ₹1.34 crore with defence costs inside the limit. At ₹1 crore AOA the business would carry ₹34 lakh plus the deductible; at ₹2 crore it would carry only the deductible. The extra ₹16,000 + GST (₹18,880) a year buys ₹34 lakh of protection in that scenario. If one client contract also requires ₹2 crore, the decision is made.

Special cases

• PLI Act policy: the amount is set by law, at least the undertaking's paid-up capital within the statutory ceiling. See the PLI Act guide
• Employees' compensation: there is usually no fixed limit; the policy follows the statutory scale based on declared wages, but check any limit on medical expenses
• Exports to the USA or Canada: limits are usually much higher and defence costs often sit inside the limit, so seek specialist advice
• Group or master policies: if your group buys a global policy, check whether the Indian local policy limit is shared with other countries

Common mistakes

• Copying last year's limit without checking new contracts or growth
• Ignoring a low products sub-limit hidden inside a high general limit
• Choosing 1:1 AOA:AOY with many sites
• Forgetting that defence costs inside the limit reduce money available for compensation

Frequently asked questions

Is ₹10 lakh enough for a small shop?

It depends on footfall and neighbours. A single serious injury or fire spreading to a neighbour can exceed ₹10 lakh. Price ₹25 lakh and ₹50 lakh before deciding.

What happens when the limit is exhausted?

The business pays the rest itself. The insurer may also stop defending once the limit is paid, depending on the wording.

Can I reinstate the aggregate after a claim?

Some insurers allow reinstatement for an additional premium. Ask after any large claim.

Do higher limits make me a target for claimants?

Claimants usually do not know your limit in advance. The bigger risk is being under-insured when a claim arrives.

Sources

• IRDAI — policyholder protection and product filing
• India Code — Public Liability Insurance Act, 1991 and Consumer Protection Act, 2019
• Supreme Court of India — judgments on assessing compensation for death and injury