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Accounting and Bookkeeping for

Law Firms and Attorneys

Law firm accounting demands more than a general bookkeeper can offer. Maspartner brings law firm accounting expertise in trust accounting, matter-based reporting, and compliance built for US firms.

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About Trust Accounting and Legal Bookkeeping

Law firm accounting runs on a different set of rules than standard small business bookkeeping. Every state bar in the US requires attorneys to hold client retainers in an IOLTA or separate trust account, reconciled every month, and that requirement applies the same way to a solo practitioner as it does to a forty-attorney firm. A missed reconciliation or an accidental commingling of funds can turn into a bar complaint rather than a simple fix, which is why law firm accounting is treated as a compliance function first and a bookkeeping function second.

We work with solo attorneys, boutique litigation firms, and multi-partner practices across the US, supporting firms on Clio, PCLaw, and MyCase alongside QuickBooks and Xero. Our team understands billable hour tracking, matter-based cost allocation, and the line between operating and client funds — the three areas where law firm bookkeeping most often breaks down. Every engagement follows the same law firm accounting standards, whether accounting for law firms with one attorney or forty.

Services We Provide

Trust account 3-way reconciliation

Client-wise IOLTA records

Earned revenue transfers

Retainer agreements, balances

Invoicing and follow-ups

Unbilled cost tracking

Automated expense tracking

Billable hours tracking

State Bar audit support

Period-end closures

Custom client/case reports

Case tool integrations (Clio, MyCase, etc.)

Periodic transaction recording

Billable hours tracking

Client billing rate calculation

Retainer agreements, balances

Invoicing and follow-ups

Unbilled cost tracking

Automated expense tracking

Bank/card reconciliations

State Bar audit support

Period-end closures

Custom client/case reports

Case tool integrations (Clio, MyCase, etc.)

The Problems We Solve for Law Firms.

We run monthly three-way reconciliations as standard practice, catching discrepancies the month they happen the single most important control in law firm accounting.

We build matter-based reporting that flags gaps between time worked and time billed, so law firm accounting data reflects the work actually done.

We track receivables by age and run a structured follow-up process, so payments come in on schedule. Receivables management sits inside our law firm accounting services rather than alongside them.

One team manages registration, withholding, and filings across every state involved, keeping law firm accounting consistent across jurisdictions.

Our team specializes in law firm accounting, so the expertise is already built in.

Benefits of Outsourcing Services

Trust Compliance Confidence

Stay compliant with accurate IOLTA reconciliation and trust accounting records.

More Billable Time

Spend less time on bookkeeping and more time serving clients.

Improved Cash Flow Visibility

Track receivables, monitor cash flow, and make informed financial decisions.

Scalable Accounting Support

Expand your finance function without hiring additional in-house staff.

Audit-Ready Financial Records

Keep accurate, organized books that are ready for audits and compliance reviews.

Why Clients Choose Us?

Beyond offering services, we complement your journey with our commitment to Satisfaction

Why Mercurius?

4.7
Rated 4.8 out of 5

100+ Ratings on Google

Experience the services that’s earned us top ratings.

Understanding UK taxation rates and compliance requirements. | NetSuite accounting

In-house Remote Bookkeepers

Our professionals are highly qualified and experienced in diverse bookkeeping practices.

Expert UK taxation advice for individuals and businesses.

Technology-Driven

Technology-Driven Utilize the latest bookkeeping software and tools for accurate and efficient financial management.

UK taxation services with expert filing support from Maspartner. | canada company formation | uae vat

Strong Industry Expertise

Our experience across various industries enables us to have a better understanding of your business’s unique challenges and requirements.

UK taxation services with expert filing support from Maspartner. | canada company formation | uae vat

Tailored Solutions

We offer customized bookkeeping services that align perfectly with your business needs.

Software Expertise

Industries We Serve

Other Industries We Serve

Mercurius delivers precise financial solutions backed by industry expertise, ensuring accurate and reliable results across all sectors.

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Ecommerce and Retail

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Accounting, Tax and CPAs

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Law firms and Attorneys

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Real Estate and Construction

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Education and Coaching

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IT and SaaS

Client Testimonials

Great work – love the dedicated member of the team that is assigned to work on my account.

Graham Blair

Habitat Seven Inc 🇨🇦

Manvi and the team at Mercurius are excellent. We have been working with them for a number of years and they have been pivotal in keeping our accounts in good order.

Cameron Kincaid

Chemeyes Ltd 🇬🇧

Siddhartha is delightful to work with and always completes assignments ahead of schedule and with no iteration needed.

Mike Schoenfeld

MBS Consulting🇺🇸

Pleasant to work with, knowledgeable on accounting principles, responsive

Christine Atieno

Keys Please Homes🇺🇸

Sid and his team so excellent work – on time and very attentive to detail.

Joel Cape

Joel E Cape, PLC🇺🇸

Seeking custom services?

Drop your email, and we’ll get in touch, or contact us directly.



    Legal Practices We Support

    PERSONAL INJURY | FAMILY | CRIMINAL | BANKRUPTCY | ESTATE PLANNING AND ELDER | IMMIGRATION | LABOR/EMPLOYMENT | REAL ESTATE | SOCIAL SECURITY | WORKERS' COMPENSATION | PROBATE | MEDICAL MALPRACTICE | CIVIL RIGHTS | INTELLECTUAL PROPERTY | TRUSTS & ESTATES | CONTRACT | LITIGATION | BANKING & FINANCE | CORPORATE | ENVIRONMENT | CONSTRUCTION | PRODUCT LIABILITY

    FAQs

    The safest approach for law firm accounting is monthly three-way reconciliation between the trust bank account, the client sub-ledger, and the general ledger, done as a standing process rather than a year-end scramble. Most bar complaints trace back to small errors that went unnoticed for months, not deliberate misconduct, which is why consistency in law firm accounting matters more than complexity here.

    Structured accounts receivable tracking is an essential part of effective law firm accounting, where every invoice is aged and followed up on a defined schedule, helping firms catch slow payments before they turn into a cash crunch. Firms that leave AR informal tend to notice the problem only after payroll becomes difficult to cover, which is why AR aging belongs inside the monthly law firm accounting cycle rather than outside it.

    General bookkeeping experience does not automatically translate to law firm accounting. IOLTA reconciliation, matter-based cost allocation, and bar-compliant recordkeeping are specialized skills, and firms that hire without confirming this experience often discover the gap during an audit rather than beforehand. Outsourced law firm accounting removes the hiring risk without adding headcount.

    Pricing depends on transaction volume, trust account complexity, and whether payroll is included, and most firms pay a monthly fixed fee for law firm accounting rather than an hourly rate. Solo practitioners typically pay less than firms with multiple partners and associates, since matter volume and reconciliation complexity scale with headcount, so law firm accounting costs track firm size more closely than hours worked.

    Trust account data security and compliance depend on the provider’s process, not their location. Firms should confirm the outsourced law firm accounting team follows US state bar trust accounting rules specifically, uses secure data handling protocols, and has documented experience with IOLTA reconciliation before handing over access. A provider that treats law firm accounting as a specialization rather than an add-on is the safer choice.Trust account data security and compliance depend on the provider’s process, not their location. Firms should confirm the outsourced law firm accounting team follows US state bar trust accounting rules specifically, uses secure data handling protocols, and has documented experience with IOLTA reconciliation before handing over access. A provider that treats law firm accounting as a specialization rather than an add-on is the safer choice.

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