Starting a law firm comes with a long to-do list. Professional liability insurance is one of the first items that needs to get checked off. Some states require it. Many courts and clients expect it. And regardless of requirement, it is the one policy that protects everything you have built if a client ever makes a claim against your work.
This guide walks through everything a new firm needs to know — what coverage actually is, how to get it, what it will cost, and how the pricing changes over time.
What Professional Liability Insurance Actually Covers
Professional liability insurance for law firms — sometimes called legal malpractice insurance or lawyers professional liability (LPL) — covers claims arising from your professional services. If a client alleges that your advice, work product, or representation caused them harm, the policy responds by paying for your defense and, if necessary, any settlement or judgment up to your policy limits.
These policies are written on a claims-made basis. That means the policy that responds to a claim is the one in force when the claim is made — not when the work was done. This is different from general liability insurance, which is occurrence-based. The claims-made structure is why maintaining continuous coverage matters and why letting your policy lapse even briefly can create gaps.
The policy covers your professional services broadly. As a new firm, you may not have a fully defined practice mix yet. That is fine. Standard professional liability policies cover the practice of law generally. If your areas shift in the first year, you are still covered. You will update your practice mix at renewal and the carrier will reprice accordingly.
What You Need to Apply
The application process is straightforward. Carriers want to understand who is practicing, what they do, and whether there is any prior claims history. Here is what you will typically need:
Basic firm information — firm name, address, date of formation, and state of licensure. Attorney roster — name, bar admission date, full or part time status, and designation (partner, associate, of counsel, etc.) for each attorney. Practice area breakdown — an estimate of how your time is allocated across different types of work, expressed as percentages that total 100%. Prior claims history — any claims or circumstances in the past five years. For a brand new firm with no prior coverage, this is straightforward. Desired coverage — the limits and deductible you want to carry.
For a brand new solo or small firm, the application takes less than an hour to complete. With a broker who knows the market, you can have quotes back same business day.
Limits and Deductibles
Professional liability policies are structured with a per-claim limit and an aggregate limit. The per-claim limit is the maximum the policy pays on any single claim. The aggregate is the maximum it pays across all claims in the policy year. A $1,000,000 / $2,000,000 policy pays up to $1 million per claim and up to $2 million total in a given year.
For most small firms, $1,000,000 / $1,000,000 or $1,000,000 / $2,000,000 is the starting point. Solo practitioners in lower-risk practice areas sometimes start at $500,000 / $500,000. Firms doing real estate, litigation, or securities work typically carry higher limits given the dollar values involved.
The deductible is what you pay out of pocket before the policy kicks in. Common options range from $0 to $25,000. A higher deductible lowers your premium. Most small firms start with a $2,500 to $10,000 deductible.
One important note: in most legal malpractice policies, defense costs erode your limits. Every dollar spent defending a claim reduces what is available to pay a settlement. This is called a defense within limits structure and it is standard in this market. It is one reason why carrying adequate limits matters more than it might initially seem.
What It Will Cost
Pricing for a new firm depends on three main variables: practice areas, firm size, and location. The table below gives a rough sense of annual premium ranges for a solo attorney in Year 1 of coverage at $1,000,000 / $1,000,000 limits with a $5,000 deductible.
| Practice Area | Small Market | Mid-Size Market | Major Metro |
|---|---|---|---|
| Criminal Defense | $800–$1,200 | $1,000–$1,600 | $1,200–$2,000 |
| Estate Planning / Probate | $800–$1,400 | $1,000–$1,800 | $1,400–$2,400 |
| Immigration | $900–$1,600 | $1,100–$2,000 | $1,400–$2,400 |
| Family Law | $1,000–$1,800 | $1,200–$2,200 | $1,600–$2,800 |
| General Litigation (Defense) | $900–$1,600 | $1,100–$2,000 | $1,500–$2,600 |
| Employment Law | $1,200–$2,000 | $1,500–$2,500 | $1,800–$3,200 |
| Transactional / Corporate | $1,200–$2,000 | $1,500–$2,600 | $1,900–$3,200 |
| Residential Real Estate | $1,400–$2,400 | $1,800–$3,000 | $2,200–$3,800 |
| Commercial Real Estate | $1,600–$2,800 | $2,000–$3,400 | $2,600–$4,400 |
| Plaintiff Litigation | $1,400–$2,400 | $1,800–$3,200 | $2,400–$4,200 |
| Copyright / Trademark / Patents | $2,000–$3,500 | $2,500–$4,500 | $3,500–$6,000 |
| Securities / Finance | $2,200–$3,800 | $2,800–$5,000 | $3,800–$7,000 |
These ranges are for illustrative purposes only and should not be taken as a quote or guarantee of pricing. Actual premiums depend on a wide range of individual factors including claims history, specific practice mix, firm structure, carrier appetite, and underwriting review. Your actual quote may be higher or lower.
Adding attorneys increases the premium. Each additional attorney adds to the base rate, with the increase depending on their designation, start date, and practice area. A two-attorney firm typically pays 1.6 to 1.9 times the solo rate, not double, because there are some fixed costs that do not scale linearly.
How Limits Affect the Premium
Higher limits cost more, but not proportionally. Going from $500,000 / $500,000 to $1,000,000 / $1,000,000 typically adds 20–35% to the premium, not 100%. Going from $1,000,000 to $2,000,000 per claim usually adds another 15–25%. Limits are one of the more efficient ways to buy additional protection relative to cost.
| Limits | Relative Cost vs. $500K/$500K |
|---|---|
| $500,000 / $500,000 | Base |
| $500,000 / $1,000,000 | +10–15% |
| $1,000,000 / $1,000,000 | +20–35% |
| $1,000,000 / $2,000,000 | +30–45% |
| $2,000,000 / $2,000,000 | +50–70% |
| $2,000,000 / $4,000,000 | +65–90% |
Approximate relativities. Actual pricing varies by carrier and risk profile.
Step Rating: Why Your Premium Will Increase Over Time
One of the most common surprises for new firms is that their premium goes up every year even when nothing changes. This is not an error or an arbitrary increase. It is called step rating, and it is built into how professional liability policies are priced.
When a new firm gets its first policy, the carrier is only covering claims that arise from work done during that first year. In Year 2, the policy covers both Year 2 work and any claims that surface from Year 1. In Year 3, it covers three years of work. As the window of potential prior acts exposure expands, the carrier charges more to reflect that increased exposure.
This step-up continues for roughly five years, at which point the premium levels off at what carriers call the mature rate. As a rough benchmark, expect your premium to roughly double between Year 1 and Year 5, assuming nothing else changes — no additional attorneys, no claims, no practice area changes. The increase is predictable and gradual, and every carrier prices it this way.
Understanding this upfront matters because firms sometimes see the Year 2 renewal and assume something went wrong. Nothing did. It is just how the pricing works.
What Happens When Your Practice Changes
New firms often do not have a fully settled practice mix in Year 1. That is fine. The policy covers your professional services broadly, and you will not lose coverage because you took on a matter type that was not listed on your original application.
At renewal, your broker will ask you to update your practice area breakdown. If you have moved into higher-risk work, the premium will reflect that. If you have moved toward lower-risk transactional work, it may come down. The adjustment happens at renewal, not mid-term, and it is based on where you are headed — not just where you have been.
The Process: From Application to Bound Coverage
For a new small firm, getting coverage in place is typically a one-to-three day process when working with a specialist broker.
Day one: complete the application with your firm info, attorney roster, practice areas, and desired limits. A good broker will help you fill it out correctly and submit it to multiple carriers simultaneously.
Day one or two: quotes come back from carriers. Your broker presents the options with a comparison of pricing, terms, and carrier highlights. For a new firm, you will typically see three to six options.
Day two or three: you select a carrier, sign the application, and the broker binds coverage. You receive a binder confirming coverage is in place, followed by the full policy within a few weeks.
The effective date can be the same day in most cases. If you have an urgent need — a court deadline, a client contract requirement, or a state bar requirement — coverage can typically be bound within 24 hours of a completed application.
A Few Things New Firms Get Wrong
Waiting too long. Some attorneys put off getting coverage until they have their first paying client or their first real matter. The better approach is to get covered before you start practicing. A claim can arise from advice given informally before you even officially opened your doors.
Choosing the cheapest option without understanding why it is cheap. A lower premium sometimes reflects a surplus lines carrier, a weaker policy form, or a consent-to-settle provision that is less favorable. Price matters, but so does what you are actually buying.
Not telling your broker when things change. Adding an attorney, taking on a new practice area, or bringing in contract attorneys are all things your carrier needs to know about. Most of these do not trigger mid-term premium changes, but failing to disclose them can create coverage issues if a claim ever arises from that work.
Getting coverage in place is straightforward when you work with someone who knows the market. If your firm is just starting out and you want to understand your options, we are happy to walk you through it.