Legal Budget Planning: Rethinking How GCs Split Legal Spend

November 9, 2026 · 8 min read

Nick Fleisher is co-founder and CEO at Sandstone.

Legal budget planning at most companies starts with last year's numbers. GCs typically make a budget by rolling the prior annual budget forward, adjusting headcount for approved hires and outside counsel for expected rate increases, and then giving technology whatever remains. That method no longer holds up, because the pressure on each line of the budget has changed faster than the method used to set it. GCs who rethink how legal spend is split, rather than trimming each line, gain both cost control and capacity from the same dollars.

The traditional legal budget split, and why it's breaking

The traditional legal department budget rests on a simple structure. Personnel is the largest fixed cost, outside counsel absorbs whatever the team can't handle, and technology is a small discretionary line. In the 2024 ACC and Major, Lindsey & Africa benchmarking survey, internal spend made up 52% of the total and external spend 48%. Outside counsel accounted for 87% of that external portion.

That split assumed in-house teams had limited capacity and that complex or high-volume work would default to a law firm. That default now costs more every year: Wells Fargo's year-end 2025 survey of more than 130 law firms found standard billing rates up 9.6%, after a 9.1% increase the year before. Meanwhile, request volume grows with the business while headcount stays flat, and finance now scrutinizes legal as a cost center that should forecast its spend as reliably as any other function.

On a recent episode of Evolving with Jessica Nguyen, Jessica Nguyen, Sandstone's chief strategy and legal officer, called her legal budget "a fixed pie" divided among headcount, technology, and outside counsel. Because the total is fixed, adding to one line means taking from another, so the decision that matters most is how the total is divided.

What goes into a legal department budget

A legal department budget is the financial plan covering every cost of delivering legal services to the business, from salaries to software. Shares vary by industry, company size, and regulatory exposure, so treat any benchmark as a reference point rather than a target. A budget template built only on last year's line items will reproduce last year's split, so review each category on its own terms.

Personnel and headcount costs

Salaries, benefits, bonuses, and contractor fees for in-house counsel and legal operations staff are the largest line item for most departments. They account for most internal spend and are fixed costs for the fiscal year, since headcount rarely changes quickly once the budget is approved.

Outside counsel and vendor fees

External spend covers law firms, alternative legal service providers (ALSPs), and specialized vendors for work such as e-discovery and compliance reviews. At close to half of total legal spend for many companies, it is also the hardest category to predict, because litigation costs depend on events the department doesn't control. As the largest variable cost, this category changes most when a GC rethinks the split, which is why legal spend management tends to focus here first.

Legal technology and software

Common tools include contract lifecycle management (CLM), matter management, e-billing, and legal AI platforms, which together form the department's legal tech stack. Benchmarking surveys consistently describe technology as a small share of total legal spend, though Gartner predicted in 2026 that in-house legal technology budgets will double by 2028. Despite that small share, technology has the most influence over the other categories, because it determines how much work the team can absorb before sending it outside.

Training and professional development

This line covers CLE requirements, conferences, certifications, and skills training. It is usually one of the smallest categories, and it increasingly includes training on AI tools alongside legal skills.

Operating and overhead expenses

Operating expenses include subscriptions, research databases, insurance, travel, and allocated office costs. Many are set by contract, so they change little from one fiscal year to the next.

Taken together, these lines divide into fixed and variable expenses. Personnel and overhead are largely fixed costs, while outside counsel is the main variable expense, so moving work between in-house and outside counsel is where the budget has the most room to change.

Why you can't rethink the split without visibility into legal work

A GC can't decide what should move in-house or go external without seeing what work exists. Many legal leaders can't see in real time where requests originate, how work moves through the team, or which matters consume the most spend. When intake is scattered across email, Slack, and ticketing tools, the true volume and type of routine work stays hidden. Without that picture, a GC can't identify what could be insourced or forecast the next year accurately.

A unified intake and workflow layer records each request's source, type, requester, and time to resolution. That data shows the GC which categories of work recur and which currently go to outside counsel. With that record in place, financial management in legal moves from estimates to evidence about the work the business actually sends.

How to split legal spend between in-house and outside counsel

What stays internal and what goes external is a strategic question about where the department's judgment is best spent, and cost is only one part of the answer. Many departments have already started keeping more work internal: in Harbor's 2025 Law Department Survey, 65% of departments reported intentional efforts to keep work in-house over the previous one to two years.

When to keep work in-house

Routine contracts, standard NDAs, policy questions, and day-to-day commercial support belong in-house. This work depends on speed and on knowledge of the company's positions, counterparties, and risk tolerance. The in-house team already holds that institutional knowledge, while an outside firm would have to be paid to learn it.

When to engage outside counsel

High-stakes litigation, specialized regulatory matters, M&A transactions, and genuine capacity overflow justify outside counsel. The deciding factors are expertise the team doesn't have and legal issues where the exposure is large enough that specialized legal advice costs little by comparison. For these matters, require a law firm budget at engagement and compare actual spend against it as the matter progresses.

Trista Engel and Jessica Markowitz of Paragon Legal called the broader trend "unbundling" on the podcast. In their account, day-to-day work keeps moving out of law firms to in-house teams or more cost-effective providers, including flex talent and other alternative legal service providers, while make-or-break matters stay with the firms. As Engel put it, choices among headcount, outside counsel, flex talent, and technology are "resource allocation decisions. They're budget decisions."

How AI shifts routine work back in-house

AI changes the economics of the split by letting the in-house team handle more volume without adding headcount. AI-powered intake reads each request, gathers the relevant contracts and prior positions, and routes it to the right owner. Playbooks capture the department's negotiation positions, and drafting tools apply them to produce a first pass for a lawyer to review. Dina Segal, chief legal officer at Gusto, said on the podcast that this lets commercial lawyers start the day with contracts already pre-reviewed and redlines drafted, leaving more of their time for the difficult issues that remain.

Platforms like Sandstone make insourcing practical by surfacing that context and precedent as each request arrives, so lawyers don't have to reconstruct the history of the relationship. In this model AI adds capacity without replacing the team's judgment, and in budget terms it automates low-value work and frees money for strategic priorities.

How to rebalance spend toward legal technology and AI

Because technology spend makes a new split possible, evaluate it on long-term value and cost displacement rather than sticker price.

Calculate total cost of ownership. TCO includes implementation, training, maintenance, and integration costs beyond the license fee. A tool with a low subscription and a six-month implementation can cost more in its first year than a pricier tool that works inside existing systems.
Prioritize technology that reduces outside counsel dependency. AI-assisted contract review, automated intake, and knowledge management platforms let the in-house team handle work that would otherwise go to a firm. Matter management data then helps estimate how much external spend each tool displaced.
Frame AI spend as cost avoidance and capacity creation. Tie each investment to reduced outside counsel fees and faster turnaround, so the business case uses terms finance already tracks.
Keep contract terms short. Jessica Nguyen recommends legal AI agreements of a year or less, because the market is moving quickly and the vendors that led a few years ago are innovating more slowly than newer entrants.

Building a legal budget that enables business growth

The best legal budgets position legal as a strategic partner that supports the company's revenue targets and financial goals. Modern tools and data-driven planning turn the budgeting process from a defensive exercise into a case for growth, because a GC who can show what work the department absorbed and what it saved can argue for investment instead of defending a cost center.

Rethinking the split is how GCs get there. The process starts with visibility into the work, moves routine matters in-house with AI support, and reserves outside counsel for the expertise and risk that justify its cost. Departments already treat this as a priority: in Harbor's 2025 survey, they ranked financial management second only to technology strategy for the year ahead.

Learn how Sandstone enables in-house legal departments with AI.

FAQs about legal budget planning

How do general counsel justify legal department costs to the CFO?

Frame legal spend in terms of risk mitigation, deal enablement, and cost avoidance. Where possible, show how outside counsel savings and faster contract cycle times affect the figures in the company's financial statements, and describe business outcomes rather than legal activity.

How often should a legal department review and adjust its budget?

Review the full budget at least quarterly, with a monthly review of volatile categories, such as litigation and outside counsel. Comparing actuals to the monthly budget and to each law firm budget catches overruns while there is still time to renegotiate scope or move work in-house.