add-on insurance, one file at a time.

Before an add-on closes, compare the target’s operations and claims to the program, read each policy’s acquisition clause, and get insurer confirmation in writing.

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an existing platform program is a starting point, not automatic coverage.

The short answer. Decide separately what covers past acts and what covers the business after closing, and consolidate only when shared limits, workers’ comp experience rating, deductibles, and exit flexibility still work. Treat each add-on as its own insurance file, because placement is a separate step from this review.

By Nick McClish, Managing Partner · 5 min read · Reviewed October 13, 2026

what are the key takeaways?

1
Read each clause.
Eligibility, size, and notice windows are policy by policy.
2
Split past and future.
A tail is for pre-close acts. New acts need go-forward coverage.
3
Combine on purpose.
A worse experience mod or shared limit can offset a smaller invoice.

why does add-on insurance need its own file?

Add-ons are the modal private equity deal. Goodwin’s 2024 note on JD Supra put add-ons at about 76% of private-equity-backed buyouts in the first quarter of 2024, after more than 76% at the end of 2022. Independent Sponsor News (April 2026) frames the sponsor path as platform first, then proprietary add-ons. Operating partners are expected to make integration real: systems, talent, pricing, and risk.

What is easy to miss is one answer that walks a platform and an add-on under one program, including when not to combine.

what six decisions does every add-on insurance file need?

Six decisions before the add-on closes
Decision	What good looks like	Who owns it
Fit	Target operations, products, locations, vehicles, professional services, and customer contracts mapped to the platform program	Licensed insurance agency and operating lead
Acquisition clause	Eligibility, size thresholds, notice windows, and required information read on each policy	Licensed insurance agency and counsel
Prior acts	Historical claims, reporting rights, and any extended reporting period allocated in the purchase agreement	Counsel and licensed insurance agency
Limits	Shared versus separate capacity; umbrella and excess still sized for the combined business	Licensed insurance agency and CFO
Cost and rating	Premium, audit, collateral, and workers’ comp experience mod modeled before close	Licensed insurance agency and CFO
Handoff	Named owners for certificates, claims contacts, insurer conditions, and the first renewal	Operating partner and finance

Related live checklist: add-on acquisition insurance.

when should an add-on join the platform program?

Decision map. Illustrative only.
Situation	Lean toward
Same industry, similar operations, clean loss history, insurer already on the platform	Endorse into the platform program after written insurer acceptance
New product, professional liability, foreign operations, or customer contracts the program never described	Separate placement, or a carve-out, until the program is rebuilt
Claims-made lines with prior-acts exposure	Tail for pre-close acts; new platform coverage for post-close acts
High-deductible workers’ comp or auto with collateral	Model replacement collateral and do not assume the seller’s letter of credit transfers
Exit or carve-out likely within a few years	Prefer structures that do not strand the sold entity on shared limits without a clean exit path
Multiple planned add-ons above traditional small-deal floors	Evaluate a transactional portfolio path on the deal side, separate from the operating program

Coverage is subject to underwriting and policy forms. Only a binder or policy creates coverage.

how can an add-on change the workers’ comp experience mod?

When ownership combines entities, rating bureaus often combine loss histories. A platform with a sub-1.00 mod that buys an add-on with a worse mod can see the combined factor move up. That can raise premium and, in trades and contracting, affect bids where an owner or general contractor sets a maximum mod, often 1.00. Some states now limit that practice.

What to do before the letter of intent hardens:

Pull loss runs and the current experience mod for platform and target.
Ask for a test calculation under the applicable bureau rules. In NCCI states, ownership changes are reported on the ERM-14 form. North Carolina, New York, New Jersey, Massachusetts and other independent-bureau states use their own forms and rules.
Put the modeled premium and any bid-eligibility risk in the model and the 100-day plan.
Report ownership changes in writing within 90 days. Under NCCI rules, a revised mod applies back to the date of the change, whether it goes up or down, and can reach the current and two prior mods. Late or missing reports can lead to retroactive premium changes.

Sources: NCCI ownership reporting and ERM-14 materials; NCCI Item E-1405 on ownership changes. State rules differ. Confirm with the bureau and carrier for the states involved. Riza is a licensed insurance agency in New York, Colorado, Texas, Florida, Massachusetts, Arizona, Nevada, North Carolina, New Jersey and Georgia.

The longer read on combination, no change, and bid eligibility is what happens to the workers’ comp experience mod after an acquisition.

which deal-side insurance tools apply to add-ons?

This is separate from the operating program.

Transactional tools. Product rules change.
Tool	Typical use on add-ons	Notes
Traditional buy-side reps and warranties	Larger add-ons where carrier appetite fits	Goodwin notes it is less prevalent on smaller add-ons, where sponsors often rely on traditional indemnification and other contract protections.
Small-deal transactional products	Often discussed for deals under about $20M in deal value. Illustrative; product rules vary.	Some carriers offer transaction liability forms built for sub-$20M deals, with lighter underwriting and shorter timelines than traditional buy-side policies.
Portfolio or platform transactional policy	When the buyer knows a series of add-ons is coming	Some carriers offer portfolio policies that add independent limits for each acquired company, so capacity is not diluted across the platform.

Illustrative only. Product names, thresholds, and pricing change by carrier and quarter. Sources: Goodwin via JD Supra. Engage a licensed insurance agency early in exclusivity if any transactional product is in play.

what does an illustrative add-on insurance file look like?

Hypothetical illustration, not a client
Item	Illustrative finding	Treatment
Fit	Target runs commercial refrigeration the platform never wrote	Carrier endorsement requested; temporary general liability and products carve reviewed
Prior acts	Two open workers’ comp claims inside the deductible	Seller keeps the reporting path; special indemnity in the purchase agreement
Mod	Platform mod 0.92; target mod 1.18	Test calculation shows a combined figure around 1.02; safety plan in the 100-day workstream
Limits	A shared $2M general liability limit would dilute capacity across both entities	Keep separate primary in year one; umbrella reviewed at the first renewal
Transactional	Enterprise value under common small-deal floors	Indemnification and escrow; a small-deal product evaluated and declined

Coverage is subject to underwriting and policy forms. Only a binder or policy creates coverage.

who wrote this guide?

Nick McClish, Managing Partner, Riza Risk

Nick McClish is Managing Partner of Riza Risk, a licensed insurance agency. He founded and sold Pluto Pet Insurance, and he was the first U.S. hire at ManyPets, where he led global growth and the U.S. launch as premium grew from $33M to $280M. He raised and led a search fund, founded Day One Growth, and holds an MBA from London Business School.

good to know.

Straight answers to what deal teams ask about add-on insurance integration.

Is an acquired company automatically insured under the platform program?

Only to the extent each policy says so and its conditions are met. Get insurer confirmation for the transaction.

Will combining programs always lower premium?

No. Shared limits, higher mods, larger deductibles, or collateral can offset any difference on the invoice.

Who should own the add-on insurance file?

The operating partner or portco CFO owns the calendar. A licensed insurance agency owns the market and policy work. Counsel owns purchase-agreement and credit-agreement language.

Do we need reps and warranties insurance on every add-on?

Often no on smaller add-ons. Evaluate size, seller sophistication, timeline, and whether a small-deal transactional product fits. Indemnification still matters.

What is the first thing capital partners ask after the third add-on?

Whether the platform can show a repeatable insurance playbook: the same diligence pack, the same handoff, and the same renewal rhythm.

see it in dollars before you sign.

Riza helps turn program facts into dollars a deal team can use. Placement, if any, is a separate step.

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