Aggravation of risk under Estonian insurance law (VÕS §§ 443–447)

The insurer prices the risk on the basis of the facts presented at conclusion. If those facts change during the term of the contract, the balance between premium and risk is disturbed. Estonian law addresses this through the rules on the increase of the probability of the insured risk (kindlustusriski võimalikkuse suurenemine) in the Law of Obligations Act (võlaõigusseadus, VÕS) §§ 443–447.¹ The rules follow the German model. Their core protective element, the list of situations in which the insurer is not released (§ 445 lg 3), cannot be varied to the detriment of the policyholder (§ 427 lg 1). They are also among the most litigated in Estonia: the Supreme Court has repeatedly held that an increase of risk cannot be assumed in the abstract and that the insurer bears the burden of proving it.²

1. What counts as an increase of risk

An increase of risk is a change in circumstances after conclusion of the contract that makes the occurrence of the insured event, or an increase in its extent, more probable than was assumed when the contract was concluded. Three features follow from the statute and the case law:

• Duration. The change must be of a certain permanence. A short, one-off situation is not an increase of risk but at most a breach of a safety obligation. The Supreme Court has held that absence from a dwelling for a few weeks is not as such an increase of risk.³
• Materiality. Insignificant increases are disregarded (§ 447 lg 2).
• Proof. The insurer must prove that the risk actually increased compared with the situation at conclusion, and the court will not presume it from abstract considerations. Indirect evidence may be used, but must be assessed carefully.²

2. Subjective and objective increase

Estonian law distinguishes two situations, which share a common notification duty:

Subjective increase (VÕS § 444). After conclusion of the contract, the policyholder may not increase the probability of the insured risk, or allow a third party to increase it, without the insurer's consent. Typical examples are a change of use of a building (a warehouse converted into a workshop with hot works), removal of a security system, or using a vehicle for a different purpose.

Objective increase. The risk may also increase independently of the policyholder's will, for example through works on a neighbouring plot or a change in the insured company's business carried out by a subsidiary.

Notification (VÕS § 443). In either case the policyholder must notify the insurer of the increase without delay. The duty does not arise where the increase was caused by a generally known circumstance that does not affect only that policyholder's risk (for example a general change in crime rates or market conditions).¹

Increase before conclusion (VÕS § 447 lg 1). The rules also apply to an increase that occurred between the policyholder's application and conclusion of the contract, if the insurer did not know of it at conclusion. This closes the gap between the pre-contractual disclosure regime and the aggravation regime.

3. Consequences: release from performance (VÕS § 445)

The statute provides two forms of release from the performance obligation (täitmiskohustusest vabanemine):

• Failure to notify. If the policyholder fails to notify an increase, the insurer is released for insured events occurring more than one month after the time when the notice should have reached it, unless the insurer knew or ought to have known of the increase (§ 445 lg 1).
• Breach of the prohibition in § 444. If the policyholder increased the risk without consent, the insurer is released to the extent that the increase was caused by the policyholder, for insured events occurring after the increase (§ 445 lg 2).¹

No release in four situations (§ 445 lg 3):

1. the period within which the insurer could have cancelled or amended the contract has expired without the insurer using its right;
2. the increase had no effect on the occurrence of the insured event;
3. the increase did not affect the existence or extent of the insurer's obligation; or
4. the increase was caused by the insurer.

This list is semi-mandatory: an agreement deviating from § 445 lg 3 to the policyholder's detriment is void (§ 427 lg 1).

The causation requirement is decisive in practice. If a warehouse was converted into a workshop, but the fire was caused by an electrical fault unrelated to the new use, the insurer is not released.

4. Amendment and cancellation (VÕS § 446)

Besides release for the particular insured event, the insurer has rights concerning the contract itself:

• Culpable subjective increase: the insurer may cancel (üles öelda) without notice; if the policyholder was not at fault, it may cancel with one month's notice (§ 446 lg 1).
• Objective increase: the insurer may demand an amendment of the contract (in particular a higher premium) with retroactive effect from the time of the increase. If the policyholder does not agree, or if the insurer would not have concluded the contract at all under the changed circumstances, it may cancel with one month's notice (§ 446 lg 3).
• Time limit: these rights lapse if the insurer does not exercise them within one month from learning of the increase (§ 446 lg 4).¹

The one-month window is of practical importance for claims handlers: if the claims file reveals an increase of risk, the underwriting department must decide within one month whether to amend or cancel. If it does neither, release under § 445 is lost for future events (§ 445 lg 3 p 1).

5. Exceptions and agreements (VÕS § 447)

The rules do not apply to insignificant increases or where the parties agreed that the increase does not affect the contract (§ 447 lg 2). They also do not affect agreements by which the policyholder undertakes to reduce the risk or prevent its increase (§ 447 lg 3). Such agreements are safety obligations, assessed under § 452 lg 2 p 2 (see safety obligations and proportionality).¹

This creates a classification issue. A wording may say "the insured shall notify any change in the use of the premises" (an aggravation clause), "the premises shall be protected by an alarm at all times" (a safety obligation) or "loss arising while the alarm was not operational is excluded" (a disguised obligation or a true exclusion). The Supreme Court has required courts to analyse first which of these categories a clause belongs to before assessing its validity.⁴

6. Comparison with other legal systems

• German law. The 2008 VVG retained the aggravation regime with graduated consequences depending on fault. Estonian law still follows the older binary structure, but limits release through causation.
• English law. English commercial practice uses "increase in risk" clauses and alteration warranties; after the Insurance Act 2015, a breach suspends cover only while it persists, and s 11 removes the defence where the breach could not have increased the risk of the loss which actually occurred. The Estonian causation rule in § 445 lg 3 p 2 is functionally similar.
• PEICL. The Principles of European Insurance Contract Law (Chapter 4, Section 2) allow the insurer to rely on an increase of risk only where the contract contains a clause on it, and provide graduated remedies. Estonian law reaches comparable results through causation and the one-month windows.⁵

7. Practical checklist

1. Identify the change of circumstances and its date; document why it is permanent and material.
2. Distinguish subjective (§ 444) from objective (§ 443) increase.
3. Check whether the insurer knew or ought to have known of the increase (for example from survey reports or renewal information).
4. Analyse causation between the increase and the insured event.
5. Diarise the one-month window for amendment or cancellation (§ 446 lg 4) and act within it.
6. If the clause in the wording is in substance a safety obligation, apply § 452 instead.

Related pages

• Estonian insurance contract law: overview
• Safety obligations and proportionality
• Exclusions vs obligations
• Supreme Court: increase of the insured risk
• Coverage opinions

References