Attorney Billing Increments Explained: The 6-Minute Standard

Most legal work is billed in six-minute increments — tenths of an hour. A two-minute email becomes 0.1. A twenty-minute call becomes 0.4.

To a new attorney the system looks arbitrary. It is not.

This article explains how increment billing works, why six minutes became the standard, and how to use increments in a way clients and courts accept.

What Billing Increments Are

A billing increment is the smallest unit of time you bill. Work is rounded to the increment — almost always upward — before it is priced.

• 0.1 hour (six minutes) is the prevailing standard in legal billing.
• 0.25 hour (fifteen minutes) still appears in some practices, but is increasingly disfavored.

Under tenth-of-an-hour billing, every task becomes a clean decimal: 0.1, 0.2, 0.4, 1.3.

The Six-Minute Conversion Chart

Divide minutes by 60 and round up to the next tenth. Twenty-three minutes is 0.383 — billed as 0.4.

Why Six Minutes Won

Ten units per hour makes the arithmetic trivial: increment times rate, no fractions of quarters.

More importantly, six-minute increments track how legal work actually happens. A solo attorney's day is full of two-minute emails and eight-minute calls, and quarter-hour billing prices every one of them as fifteen minutes.

Compare a two-minute email at $300 per hour:

• In 0.1 increments: billed as 0.1 — $30
• In 0.25 increments: billed as 0.25 — $75

Same email, two and a half times the price. Multiplied across a month of small tasks, quarter-hour billing starts to look less like a convention and more like a markup — which is why sophisticated clients and e-billing guidelines increasingly require tenths.

Rounding Rules That Hold Up

• Round consistently. Same direction, same method, every entry.
• Round reasonably. Billing a genuine 20-second glance at an email as 0.1, dozens of times a day, invites fee scrutiny.
• Follow the client's rules where they exist. Corporate clients and insurance carriers often impose billing guidelines that specify increments and rounding conventions.
• Let the description carry the entry. The increment prices the work; the entry should say plainly what the work was.

Reviewers of fee petitions look at patterns, not single entries. A time record with a natural mix of 0.1s, 0.4s, and 1.2s reads like work. Pages of identical minimum entries read like a formula.

Avoid Block Billing

Block billing lumps several tasks into one entry: "Review file, call with opposing counsel, draft motion — 3.5."

• Reviewers cannot tell how long each task took, so they discount the whole block.
• E-billing systems and fee auditors flag or reject blocked entries.
• Fee petitions supported by block-billed records are routinely reduced.

Bill each task as its own entry with its own increment. Itemized 0.1-precision entries are also far easier to defend line by line.

Increments Depend on Capture Habits

Increment billing only works when time is recorded close to the work.

Reconstructing the day at 6 p.m. loses precisely the entries increments exist to price — the 0.1s and 0.2s. Small entries are where memory fails first, a pattern detailed in how attorneys lose billable time.

The gap between logging as you go and recalling at day's end is the gap between billing what happened and billing what you remember — manual vs automated time tracking walks through that comparison.

How Time59 Handles Increments

Time59 records time in decimal hours, so tenth-of-an-hour billing is the native workflow: enter 0.1, 0.4, or 1.2 as the work happens.

Entries flow onto itemized invoices with each task on its own line — description, time, and amount — in the format clients and e-billing reviewers expect. Quick entry keeps small tasks from waiting until day's end, and the invoice does the increment math for you.

Final Perspective

Billing increments are a convention, but not an arbitrary one. The six-minute standard survived because it balances precision against practicality better than the alternatives.

Used with consistent rounding and honest descriptions, it protects both sides of the fee relationship: clients see exactly what they paid for, and attorneys get paid for the small work that quarter-hour systems distort.

FAQ

What is six-minute increment billing?

It is the practice of recording legal work in tenths of an hour, where each 0.1 equals six minutes. Tasks are rounded — typically upward — to the next six-minute unit, so a two-minute email bills as 0.1 and a twenty-minute call as 0.4.

How do I convert minutes into billable decimals?

Divide minutes by 60, then round up to the next tenth. Twenty-three minutes is 0.383, billed as 0.4. The conversion chart in this article maps every minute range from 0.1 through 1.0.

Is quarter-hour billing still acceptable?

It survives in some practices, but it is increasingly disfavored because it inflates small tasks — at $300 per hour, a two-minute email bills at $75 instead of $30. Many corporate clients and e-billing guidelines now require tenth-of-an-hour billing.