If you’ve ever renewed a lawyers’ professional liability policy and noticed the premium jump, even without any claims or changes in your firm, you’re not alone.
That increase is often due to something called step-rating of prior acts exposure, a standard feature of claims-made insurance policies.
For law firms, especially newer practices or those that frequently add and remove attorneys, understanding how step-rating works can help you plan ahead, avoid sticker shock, and make smarter coverage decisions.
In this article, we’ll explain what step-rating is, why it happens, and what it means for your legal malpractice premiums over time.
What Is Step Rating in Insurance?
Step-rating refers to the escalating of the premium, which occurs with all claims made insurance policies, due to the increasing exposure of the attorney/firm’s prior acts. It’s not a penalty or a surprise fee. Instead, it’s how insurers account for the growing risk of covering more years of your past work as your policy matures.
When you first purchase a claims-made policy, the policy provides coverage for legal services performed on or after the retroactive date. This retroactive date, often the date your firm first secured coverage, remains constant on all future renewals, even if you change carriers, as long as there’s no gap in coverage.
Each year you renew, the policy covers a longer history of prior work, which increases the exposure to the insurer—and typically results in higher premiums for your firm.
Most step-rated increases occur over the first five to seven years of continuous coverage. After that, your policy is considered “mature,” and the premium levels off, subject to other possible changes such as claims, attorney growth, shifts in practice areas, or carrier rate increases.
Why Does It Happen?
Step-rating happens because claims-made insurance doesn’t just cover what you do, it covers when you did it and when a claim is reported, on or after the firm’s or individual attorney’s retroactive date.
If your Lawyers Professional Liability insurance policy’s effective date and retroactive date are the same (i.e., no prior acts coverage at the start), the premium for the first year is typically the least expensive.
As your firm renews the policy each year, the premium increases because the insurer’s exposure grows, the policy continues to respond to claims arising from legal work performed on or after the retroactive date, which now covers a longer span of time.
From the insurer’s perspective, your “exposure” grows every year, even if nothing about your practice changes. Imagine a big empty basket sitting in your office when your law firm first opens. With each passing year, more and more risk, legal work that could potentially lead to a claim, is added to that basket.
As time goes on, older risks age out, but newer ones keep filling it back up. Step-rating reflects this accumulation of risk. It’s how insurers price the increasing likelihood of a claim tied to your growing body of prior work.
That’s why premiums can rise even if:
- You haven’t added attorneys
- You haven’t changed practice areas
- You haven’t had any claims
The good news? Step-rated increases are predictable and temporary. Once your policy matures, usually after five to seven years, the premium stabilizes unless one of the above referenced events occurs.
How Step Rating Works (Hypothetical Example)
Let’s say your firm purchases a new legal malpractice policy with no prior coverage. Your retroactive date, the date from which your insurer begins covering your legal work—is the same as your policy’s start date.
Here’s how your premiums might look over time due to step-rating:
Important note: Even if you switch carriers during this time, your retroactive date stays the same, so step-rating continues. Changing carriers will not reset the clock.
What Else Affects Your Premium?
Step-rating is just one piece of the pricing puzzle. Even after your policy reaches the mature step-rate for the firm’s retroactive date, your premium can still fluctuate based on other factors that influence your firm’s overall risk profile.
These include:
Number of Attorneys
The number of attorneys covered under your policy is a major factor in determining your firm’s total premium. However, not all attorneys are priced the same. Those who are new to the firm, with recent retroactive dates, often cost less in their first year because they bring less exposure to the insurer.
Over time, their premium increases each year as step-rating is applied, until they reach a fully rated or “mature” level after about five to seven years.
Because of this, adding a new attorney may not increase your premium as much as you might expect, especially if most of your current team is already fully rated. On the flip side, removing an attorney who has been with the firm for many years could result in a more significant reduction.
The premium impact of staff changes depends on each attorney’s individual step-rate schedule, so it is not always a straightforward calculation. More attorneys typically mean a higher premium, but the tenure mix across your team plays a big role in how your total cost is calculated.
Practice Areas
Certain areas of law (like securities, personal injury, or real estate) are considered higher risk by insurers. A shift in your firm’s focus can affect your rate.
Claims History
If your firm has had recent claims, or even potential claims, your premium may increase regardless of how long you’ve been insured.
Policy Limits and Deductibles
Changes in the policy limits and/or deductible, up or down, can impact the premium.
Market Conditions
Even with no changes in your firm, carriers may adjust rates across the board due to loss trends, inflation, or reinsurance costs.
Planning Ahead: Step-Rating Doesn’t Have to Catch You Off Guard
Step-rating is one of those insurance terms that sounds more complicated than it really is. At its core, it’s just a pricing system that reflects how your risk grows as your policy covers more of your past legal work.
If your firm is new, or adding attorneys, you can expect some premium increases during those early years. But they’re predictable, temporary, and manageable when you plan for them.
At Kouwenhoven & Associates, we help law firms understand exactly where they are in the step-rating cycle and what to expect at renewal. We don’t just quote coverage, we walk you through it, year after year.
Want to know if your premium increase is just a normal step-up, or something more?
Let’s talk. We’re here to help your firm navigate it with confidence.
