Law Firm Overhead Allocation: 6 Things to Settle Before You Split It

Law Firm Overhead Allocation: 6 Things to Settle Before You Split It

Law firm overhead allocation looks like an accounting chore, and it is really a decision about who looks profitable. Rent, support staff and software have to be divided among practice areas somehow, and the method you pick can make the same firm look like a winner in one view and a loser in another.

Here are six things to settle before you split it. This checklist is not ranked. If you want a bookkeeper who works with law firms, Legal Ease Bookkeeping is a Fort Worth firm whose profile lists law firm bookkeeping as its specialty. Legal Ease Bookkeeping is a paid featured member of Sam's List. The full methodology is at the end.

1. Decide What Counts as Overhead Before the Law Firm Overhead Allocation

Start with the definition. Overhead is generally a cost the firm bears that is not tied to one matter or one lawyer: rent, receptionist, accounting software, insurance, bar dues for the firm, marketing. Direct costs, such as a filing fee or an expert for one client, belong to the matter.

Write the list down. Without one, a cost sits in overhead one month and a practice group the next, and the numbers stop being comparable.

The limitation: the line is a policy choice, not a rule of accounting. Two firms can classify the same cost differently and both be reasonable, so what matters is that yours is written down and applied the same way every month.

2. Choose an Allocation Base: Headcount, Hours or Revenue

An allocation base is the measure you use to split shared costs. Headcount charges each group by how many people it has. Hours charges by time recorded. Revenue charges by collections or billings.

Each answers a different question, and each distorts in its own way. Headcount charges more to groups with many people, even when those people bill little. Hours charges more to groups that record many hours, including busy, low-rate matters. Revenue charges your best-collecting group the most, which can make a profitable group look weak.

Base	Works best when	Watch for
Headcount	Space and staff scale with people	Part-time and support staff counts
Hours	Overhead follows lawyer time	Unrecorded or late time
Revenue	Costs follow the work's size	Penalizes the best collector

The limitation: no base is neutral. Pick one on purpose, run the numbers on a second base once, and see whether any group's ranking flips. If it does, you have learned something about the decision, not the group.

3. Separate Direct Costs From Shared Costs in Law Firm Practice Area Costs

Law firm practice area costs have two layers. Direct costs are charged to the group or matter that caused them, and shared costs are what you allocate. If direct costs end up in the pool, the allocation spreads them across groups that never incurred them.

The usual leaks: one group's research subscription, a specialized case-management license, or a contract paralegal who only works for one partner. Charge those where they belong, and allocate only what is truly shared.

The limitation: more direct tagging means more bookkeeping work at the transaction level. Coding every bill takes time, and a bookkeeper can only code what the invoice or the person approving it tells them. Decide which costs are worth tagging.

4. Allocate Rent and Staff Consistently Each Month

Rent and staff are the two biggest shared costs for most firms, and they should not be re-split with new logic every month. Pick the base for each, record the percentages, and apply them on a schedule: monthly, with a note when the percentages change.

If a group adds a lawyer in April, change the headcount percentages from April forward. Do not rewrite January. A firm that restates history each time gets reports that cannot be trusted.

The limitation: consistency does not mean the split is right. It only makes comparisons fair. Review the percentages at least once a year, and when something big changes, like a new office, a lease change or a group leaving.

5. Check the Result Against Practice Area Profit and Law Firm Partner Profit

Once costs are allocated, look at the result in two ways. First, practice area profit: revenue minus direct costs minus allocated overhead. Second, law firm partner profit: what is left to the owners after all costs, before taxes and before any other adjustments your agreement makes.

Then test it with a simple question: does this match what the partners already know? If the group everyone considers the engine shows a loss, check the allocation before you check the group.

The limitation: allocated overhead is a management number. It does not change what the firm actually owes or collects, and it does not decide how partner compensation is paid. Compensation follows your partnership or operating agreement, and tax treatment is a question for your CPA.

6. Keep Trust-Related Bank Fees Out of the Cost Pool Unless Your State Allows It

Be careful with anything touching the trust account. Fees charged on trust accounts, and any cost connected to client funds, may be handled differently from ordinary operating expense. Trust accounting rules vary by state, so this article does not tell you how to treat them.

The safe workflow: flag those items, keep them out of the allocation pool until you have an answer, and ask your bar or ethics counsel what your state allows. Then write the answer into your allocation policy.

The limitation: leaving a cost out of the pool does not make it disappear. It still needs a home in the books, so confirm who bears it and where it is recorded before you finish the allocation.

Where Legal Ease Bookkeeping Fits in a Law Firm Overhead Allocation

Legal Ease Bookkeeping is based in Fort Worth, Texas, was founded in 2016 and has about 12 employees. Its profile lists law firm bookkeeping as its specialty, nationwide service, and a $500,000 minimum in revenue.

The step most relevant here is the recording: consistent coding each month, so that whatever allocation base you choose can be applied. Its profile does not list tax advice or partner compensation design, and those stay with your CPA and your agreement.

Legal Ease has 9 verified client reviews on Sam's List as of 2026-10-02. Each review is submitted by an individual who identifies as a client of the firm and rates it on communication, subject-matter knowledge, and overall satisfaction. Reviews reflect those individual experiences and do not represent an endorsement by Sam's List. Legal Ease is a paid featured member of Sam's List. Ratings and rankings are not indicative of future performance or results.

The limitation: the $500,000 revenue minimum leaves smaller firms outside its range. The profile does not say the firm builds overhead allocation models or handles trust account items in a specific way, so ask what it does and does not cover.

Frequently Asked Questions

What is law firm overhead allocation?

It is the process of splitting shared costs, such as rent, support staff and software, among practice areas or partners so each can be measured fairly. You choose what counts as overhead and a base such as headcount, hours or revenue, then apply it the same way each month.

Should a law firm allocate overhead by hours or revenue?

Neither is correct for every firm. Hours follow lawyer time, and revenue follows collections. Run both once and see whether any group's result flips. If it does, the base is driving the answer, so choose the one that matches how your costs behave.

How do law firm practice area costs affect partner profit?

Allocation changes how each group's profit looks, not what the firm earns in total. The same costs divided differently can make one group look strong and another weak. Partner compensation follows your agreement, and tax treatment is a question for your CPA.

Can trust account bank fees go in the overhead pool?

Trust accounting rules vary by state, so the answer depends on your jurisdiction. Keep those items out of the pool until you have asked your bar or ethics counsel, then record the answer in your allocation policy.

If your overhead split has not been reviewed in a year, run it on a second base this week and see what changes. To find a bookkeeper who knows law firms, browse bookkeepers on Sam's List, including the firm above.

How We Picked the Firm Featured Here

This is an unranked checklist, and it is not a survey of every law firm bookkeeper. The pool is vetted Sam's List members. The firm named, Legal Ease Bookkeeping, is a vetted Sam's List member whose profile lists law firm bookkeeping as its specialty.

What review counts mean here. We cite the verified review count and its date from the firm's Sam's List profile. A count shows how many clients wrote something down, not technical quality, and each review reflects one client's experience.

Paid listings. Listing on Sam's List is free, and so is being named in this article. The firm written up here is a paid featured member of Sam's List, which is why it is written up here.

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About the author: Kimberly Green is cofounder of Sam’s List, a directory and matching platform for financial professionals.