Definition:Warranty and indemnity (W&I) insurance
🛡️ Warranty and indemnity (W&I) insurance — known as representations and warranties (R&W) insurance in the United States — is a specialized transaction liability product that protects buyers or sellers against financial losses arising from breaches of the warranties, representations, and indemnities contained in an M&A purchase agreement. Within the insurance industry itself, W&I coverage has become a near-standard feature of deals involving carriers, MGAs, brokerages, and insurtech companies, as well as being a significant and growing line of business for the underwriters and brokers who place and structure these policies.
⚙️ A buy-side W&I policy — the most common structure globally — sits alongside the purchase agreement and responds when the buyer discovers that a seller's warranty was inaccurate, causing quantifiable loss. Coverage typically attaches above a retention (similar to a deductible) and is subject to a policy limit that often ranges from a meaningful percentage of transaction value up to the full enterprise value, depending on deal size and risk appetite. The underwriting process requires the W&I insurer to review the due diligence materials — including any vendor due diligence report, actuarial assessments, and reserve analyses — to evaluate which warranties it is willing to insure and what exclusions apply. In insurance-sector transactions, underwriters pay particular attention to the adequacy of loss reserves, the quality of reinsurance recoveries, regulatory compliance history, and the accuracy of embedded value calculations, since misstatements in these areas can produce outsized losses. Major W&I markets exist in London, the United States, Continental Europe, and increasingly in Asia-Pacific centers such as Hong Kong, Singapore, and Australia.
💡 The proliferation of W&I insurance has fundamentally altered deal dynamics in insurance M&A. Sellers — particularly private equity funds — favor W&I policies because they enable a clean exit: rather than leaving a portion of sale proceeds in escrow to backstop warranty claims, the seller can distribute capital to investors at closing while the buyer looks to the insurer for recourse. Buyers gain certainty of recovery from a rated, creditworthy counterparty instead of pursuing claims against a seller who may have dissolved or distributed funds. For the insurance industry as a product class, W&I has been one of the fastest-growing specialty lines over the past decade, with capacity expanding across Lloyd's, company markets, and dedicated MGAs. Pricing — expressed as a percentage of the policy limit — fluctuates with M&A volume, loss experience, and competitive conditions. As claims data matures and actuarial credibility improves, W&I underwriters are refining their models, and the product is extending into adjacencies such as tax liability, contingent risk, and litigation buyout coverage.
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