AFA Billing: Configuring Fee Arrangements in eBilling

AFA billing is the configuration work that lets an eBilling platform read, validate, and report on invoices submitted under alternative fee arrangements, so a negotiated fixed fee or cap is enforced at the invoice line. Most legal departments agree the fee terms in an engagement letter and then discover the eBilling system still treats every invoice as hourly. Here is how each fee type maps to an invoice rule, and what the build needs to hold up.

What is AFA billing in an eBilling platform?

AFA billing in an eBilling platform is the set of matter fields, invoice rules, and reports that let the system check each invoice against the fee arrangement agreed for that matter. Without that configuration, a fixed-fee invoice arrives looking like any hourly invoice, and a reviewer has to remember the deal and check the numbers by hand.

The fee arrangement itself is a commercial decision made between your department and the firm, and alternative fee arrangements compensate outside counsel through fixed, capped, blended, or phased pricing. The eBilling side is narrower. It answers three questions on every invoice: which arrangement applies, whether the invoice fits it, and how much of the agreed amount is used.

Manual handling shows up in review time. A reviewer checking a phased litigation budget by hand can spend 20 to 30 minutes per invoice reconciling task codes against phase totals. Configured rules cut that to a few minutes on genuine exceptions. The volume is set to grow: in a 2025 survey of 188 companies, 47 percent of legal operations teams planned wider use of alternative fee arrangements.

Which alternative fee arrangement types can eBilling validate?

eBilling platforms can validate most common alternative fee arrangement types, provided each one is reduced to a rule the system can test against invoice lines. The main types and their rules:

• Fixed fee. One agreed amount covers a matter, deliverable, or phase. The rule checks the invoice total and flags hourly lines if your policy expects a single fee line.
• Capped fee. Hourly billing continues up to a ceiling. The rule tracks cumulative billing and flags the invoice that crosses the cap.
• Phased fee. Each stage of the work carries its own fixed amount or budget. The rule uses UTBMS phase codes (L100 through L500 for litigation) to check each phase against its limit.
• Blended rate. One hourly rate applies to every timekeeper, whatever their seniority. The rule checks every line against that one rate.
• Collar. A fixed fee carries a shared band on either side, commonly 10 to 15 percent, where overruns or savings are split. The rule reports where actual effort sits in the band.
• Retainer or success fee. A recurring periodic amount, or a payment tied to an outcome. The periodic amount validates like a fixed fee, and success components are usually recorded manually.

What data does AFA billing need on the matter record?

AFA billing depends on a matter record that stores the fee arrangement as structured data the invoice rules can read. A fee type buried in a notes field is invisible to the rules engine.

• Fee type. A picklist value (fixed, capped, phased, blended, collar, retainer) set once per matter, or per phase where arrangements change partway through.
• Agreed amounts. The fixed fee, cap, or phase budgets in the matter currency, each with an effective date so a renegotiated amount leaves earlier invoices untouched.
• Scope reference. The engagement letter or statement of work that defines what the fee covers, attached to the matter.
• Owner and approver. The in-house lawyer who owns the arrangement and the person authorized to approve changes to it.

Lock the fee type once invoices start arriving. Switching a matter from hourly to fixed after three paid invoices breaks the cumulative totals. End one arrangement on a date and start another.

Portfolio arrangements, where one monthly fee covers many similar matters, usually sit on a parent record with matters linked beneath. Settle that structure before data loads. Retrofitting it after 200 matters are open is a project of its own.

How do eBilling rules enforce fixed and capped fees?

eBilling rules enforce fixed and capped fees by comparing each incoming invoice with the amounts stored on the matter and applying a flag, an adjustment, or a rejection when the two disagree. Choosing between them is the key design decision.

• Flag. The invoice passes to review with a warning. Use this during the first 60 to 90 days, while firms learn the new rules and your team tunes them.
• Adjust. The system reduces the invoice automatically, for example cutting it back to the remaining cap. Reserve it for rules that involve no judgment, since it generates the most disputes.
• Reject. The invoice returns to the firm with a reason. SimpleLegal, for example, lets administrators build validation rules that flag or reject flat-fee line items when a department’s policy does not accept them.

Tie every rule to a written guideline, because billing guidelines only protect spend once each clause becomes a configured invoice rule.

Give capped fees a tolerance of 1 to 2 percent, reviewed after the first quarter, so rounding differences stop generating noise.

How should AFA invoices handle scope changes and exceptions?

AFA invoices handle scope changes through a defined exception path that records the change on the matter before the related invoice arrives. Changes agreed by email that never reach the system lead to rejected invoices the lawyer already approved.

• Change request. The firm or the in-house lawyer raises a request to adjust the fee, cap, or phase budget, with a reason.
• Approval. The approver named on the matter signs off, with a second approval above a threshold your department sets, often 10 percent of the original fee.
• Effective date. The new amount applies from a stated date, and earlier invoices stay validated against the old terms.

Set a service level of about five working days. Slower approvals push firms to hold invoices, which distorts your accruals.

How do you onboard law firms to AFA invoice rules?

Onboarding law firms to AFA invoice rules works best as a short, structured workstream that tells each firm exactly how its arrangement will be validated before the first invoice is due. Firms already submitting LEDES invoices can usually adapt in one billing cycle, because LEDES files carry the task and activity codes that eBilling rules read.

A pilot with three to five firms on AFA matters, run for two billing cycles, surfaces most formatting problems before the wider rollout. Send each firm a one-page summary of its arrangement as the system holds it, and ask for written confirmation.

How do you test AFA invoice rules before go-live?

AFA invoice rules are tested by building a set of sample invoices for every fee type and running each one through the rules in a sandbox before any firm submits a live invoice. Expect 20 to 40 test invoices for a department with four or five fee types in use.

• Happy path. An invoice that matches its arrangement exactly passes with no flags.
• Boundary cases. One invoice lands exactly on the cap, one exceeds it by the tolerance, and one exceeds it by more.
• Sequence cases. A run of invoices on the same matter crosses a phase boundary or a cap partway through, proving the cumulative totals carry forward correctly.

Sequence cases catch the most defects, because single-invoice testing never exercises the running totals. Keep the test set after go-live, since configured billing rules need retesting after every platform release.

How should legal operations report on AFA performance?

Legal operations should report on AFA performance by comparing actual spend and effort under each arrangement with the hourly equivalent and the agreed budget, matter by matter and firm by firm.

Ask firms to include timekeeper hours on fixed-fee invoices, even at zero value. Without them, the arrangement cannot be evaluated at renewal. Review performance quarterly, and review each arrangement in full after 12 months alongside the firm’s scorecard results.

Add AFA coverage (the share of outside counsel spend under alternative arrangements) to your department dashboard. For a benchmark, invoice data covering more than $75 billion of 2025 legal spend shows alternative fee arrangements accounted for 8.3 percent of matters and 6.3 percent of spend.

Conclusion

AFA billing turns the fee terms your department negotiated into rules the eBilling platform applies to every invoice, and it gives you the data to judge whether each arrangement worked. The build is modest in scope: structured fee fields on the matter, a rule for each fee type, an exception path for scope changes, a tested set of sample invoices, and a quarterly report. Departments that settle fee types, tolerances, and approvers first usually finish configuration in four to eight weeks, and firms adapt within a billing cycle or two.

Frequently asked questions

What is AFA billing?

AFA billing is the process of invoicing and validating legal work under an alternative fee arrangement, such as a fixed fee, capped fee, or phased budget. In eBilling, it means rules that check each invoice against the arrangement stored on the matter.

Can eBilling software reject hourly lines on a fixed-fee matter?

eBilling software can flag or reject hourly lines on a fixed-fee matter when a validation rule is configured for that matter’s fee type. Most departments flag during the first billing cycles and move to rejection once firms have adapted.

How long does it take to configure alternative fee arrangements in eBilling?

Configuring alternative fee arrangements in eBilling typically takes four to eight weeks, including field design, rule build, and testing. Portfolio arrangements add time because they need parent and child matters.

Should law firms still record hours on fixed-fee matters?

Law firms should still record hours on fixed-fee matters so the department can compare the fixed fee against the hourly equivalent. Make zero-value hours a billing guideline requirement.

What happens when the scope of an AFA matter changes?

When the scope of an AFA matter changes, the change is recorded on the matter with a new amount and an effective date before the related invoice arrives. Earlier invoices keep the original terms.

Which fee arrangements are hardest to automate in eBilling?

Collars and success fees are the hardest fee arrangements to automate in eBilling because they depend on an outcome or a reconciliation at the end of the matter. A named approver decides the final payment.

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*This article is provided for general information only and does not constitute legal advice. Basla Solutions provides legal technology implementation and support services and does not practice law.*