For candidates
How to assess client portability before moving firm.
Headline originations are not portable originations. Before you claim a book will follow, run the ownership, conflicts, rate and platform tests that hiring partners already run on you.
Portable, conditional, or do not claim?
Pick the relationship type you actually have. The honest verdict is usually colder than last year’s collections suggest.
The decision-maker calls you. You set strategy, staff the work and own the next instruction. Highest realistic portability — if rates, conflicts and platform clear. Claim only after the seven gates.
No single client type decides a move — but selling institutional, panel or service revenue as portable originations is how candidacies fail diligence. Every gate is laid out below.
- ~57%
- average client portability claimed on LPQsshare of listed clients candidates say will follow
- Decipher Investigative Intelligence, 2024
- ~35%
- roughly verified actual portabilitydirectional verification against claimed LPQ figures
- Decipher Investigative Intelligence
- ~22%
- of prior book laterals bring on averageStellar Performance research — a different measure than client-count %
- Thomson Reuters Institute
- ~62%
- of laterals underperform firm revenue expectationswidely cited industry survey figure
- ALM Intelligence / Decipher, 2019
Your book is a fact. Portability is a forecast.
Firms underwrite what follows you — not what you billed last year. The gap between those two numbers is where most lateral stories break.
Partners often treat “book of business” and “portable book” as synonyms. They are not. Your book is a historical fact: originations, collections, matter mix. Portability is a forward forecast under constraints — relationship ownership, client decision rights, conflicts at the target, rate cards, platform capability, and ethics limits on what you may test before you leave.
That distinction is not academic. Decipher’s public analysis of lateral partner questionnaires has found candidates claiming, on average, that roughly 57% of listed clients will follow, while roughly verified movement sits closer to 35%. Separately, Thomson Reuters Institute Stellar Performance research has reported that laterals bring about 22% of prior book on average — a dollar-share measure, not a client-count percentage. ALM Intelligence and Decipher survey work has long put roughly 62% of laterals under firm revenue expectations. And in a Thomson Reuters Institute Forum piece, more than two-thirds of firms reported having lost a lateral partner who failed to bring the expected book. Different studies, different definitions — one shared implication: optimistic LPQ maps are not underwriting-grade evidence.
This guide is written for the candidate’s side of the table. It is not a sales pitch for moving, and it is not a firm-side diligence manual (we publish those separately). It is a way to answer a harder question: what am I actually entitled to claim — and when should I refuse to claim it? before anyone’s LPQ lands in your inbox.
Three public measures — do not average them
- Claimed on LPQs ~57% of listed clients What candidates say will follow (Decipher, 2024 average)
- Roughly verified ~35% client movement Directional verification against those claims (Decipher)
- Prior-book transfer ~22% of prior book Average dollar share laterals bring (Thomson Reuters Institute, Stellar Performance)
Client-count percentages and dollar-share of book answer different questions. Use each as a humility check, not as your personal target.
Optimistic LPQ maps are not underwriting-grade evidence.
Who does the client actually hire?
Work you touch is not work that follows. The first filter is relationship ownership — and it is stricter than most origination-credit systems admit.
Origination systems can invent a book you do not control. Credit may sit with a retiring partner while you run the file; institutional clients may generate handsome working-attorney numbers that evaporate the day you leave; panel work may look personal until the panel list is re-read. Before any rate or conflicts analysis, classify each material client on the ownership spectrum below.
Primary relationship owner
The decision-maker calls you. You set strategy, staff the work and own the next instruction. Highest realistic portability — if rates, conflicts and platform clear.
Co-originated / shared franchise
You share the client with partners who may stay. Portability is partial and political: some matters may follow; the franchise often splits.
Service partner on institutional work
You deliver excellent work on a client that belongs to the firm brand, a rainmaker or a panel relationship. Do not claim this as portable originations.
Panel / preferred-counsel only
Engagement runs through a firm appointment, RFP or insurance panel. Individual loyalty is secondary to the panel list. Default: non-portable unless you hold a personal appointment path.
Work you touch is not work that follows.
A client-level scorecard before anyone sees an LPQ.
Run every material client through the same seven gates. Fail any hard gate and that revenue leaves the portable column — not the ‘maybe’ column.
Generic career advice says “be conservative.” That is necessary and not sufficient. Conservatism without a method still produces a single vanity number with a haircut. The method that survives diligence is client-level: a short narrative per name (or tight category), a high / medium / low judgment, and an explicit list of what you are not claiming.
Ethics and partnership deeds usually block you from cold-calling clients pre-notice to ask whether they will follow. Assessment before resignation is therefore inference — relationship depth, decision rights, panel status, rate history, matter lifecycle — not client promises. Treat any informal “of course we would” comment obtained improperly as unusable for planning.
- Gate 01 Decision rights Who can re-engage counsel without a beauty parade — you, legal ops, procurement, or the board? If it is not you (or a champion who will fight for you), discount hard.
- Gate 02 Relationship ownership Did the work originate through you, or did you inherit staffing on someone else’s franchise? Service and co-staffed revenue is potential, not portable.
- Gate 03 Institutional stickiness Does the client hire the logo, multi-practice package or historical discount — or the individual? Brand-heavy and multi-touch clients often stay even when they like you.
- Gate 04 Rate & fee fit Will this relationship survive the target firm’s rack rates, blended floors and write-off culture? Rate-card shock is one of the quietest book-killers in lateral moves.
- Gate 05 Conflicts (legal & commercial) Which names die on day one at realistic target platforms — adverse parties, positional walls, industry blocks? Conflicts-blocked clients are not “maybe.” Strip them from the portable column.
- Gate 06 Platform & team Can the new firm staff the work — geography, bench, product set, regulatory coverage, trusted associates? Clients who need the old platform’s depth will not follow a lone partner.
- Gate 07 Matter lifecycle & concentration Is revenue recurring advisory, deal-flow probability, or a lumpy matter about to end? What share is one client? Peak-year spikes and single-client books are not a diversified portable practice.
| Gate | Question to ask | If it fails |
|---|---|---|
| Decision rights | Who can re-engage counsel without a beauty parade — you, legal ops, procurement, or the board? | If it is not you (or a champion who will fight for you), discount hard. |
| Relationship ownership | Did the work originate through you, or did you inherit staffing on someone else’s franchise? | Service and co-staffed revenue is potential, not portable. |
| Institutional stickiness | Does the client hire the logo, multi-practice package or historical discount — or the individual? | Brand-heavy and multi-touch clients often stay even when they like you. |
| Rate & fee fit | Will this relationship survive the target firm’s rack rates, blended floors and write-off culture? | Rate-card shock is one of the quietest book-killers in lateral moves. |
| Conflicts (legal & commercial) | Which names die on day one at realistic target platforms — adverse parties, positional walls, industry blocks? | Conflicts-blocked clients are not “maybe.” Strip them from the portable column. |
| Platform & team | Can the new firm staff the work — geography, bench, product set, regulatory coverage, trusted associates? | Clients who need the old platform’s depth will not follow a lone partner. |
| Matter lifecycle & concentration | Is revenue recurring advisory, deal-flow probability, or a lumpy matter about to end? What share is one client? | Peak-year spikes and single-client books are not a diversified portable practice. |
The reasons ‘portable’ clients stay put.
Most failed maps fail for structural reasons, not because a partner was unliked. Name the killers before a firm does.
Institutional and panel lock-in
Preferred-counsel lists, carrier panels, bank panels and multi-practice GCs often treat the firm — not the individual — as the appointed provider.
Conflicts that shelve the work
Legal conflicts and commercial “business conflicts” can zero out names that looked portable on paper. Run them early against real targets.
Rate-card and procurement shock
A relationship built at a lower effective rate may not absorb a step-up. Budget holders outside your friendly contact can re-tender the work.
Platform and geography gaps
Missing offices, product lines, trial support or regulatory coverage make follow-through irrational for the client even when loyalty is real.
Co-originators who stay behind
Partners remaining at the old firm keep the relationship threads. Shared credit often becomes shared (or lost) portability.
Live-matter timing
Trials, signed deals and mid-flight regulatory matters often cannot relocate cleanly. Timing can freeze revenue that looked portable in the abstract.
Industry commentary sometimes recycles a comfort band that partners retain most of what they projected as portable. Treat that folklore as un-sourced reassurance, not data. The published figures that do exist — claimed versus verified client movement, average prior-book transfer, underperformance and departure after missed books — all point the same way: plan on the conservative case, and treat anything above it as upside you have not earned yet.
Name the killers before a firm does.
Portability is practice-shaped, not universal.
A corporate franchise, a disputes roster and a panel-driven finance book do not travel on the same rules. Adjust the gates to the work.
Practice patterns do not replace client-level diligence — they tell you where to look first. For banded ranges from our proprietary partner conversations, see how portable a book is by practice. The notes below are assessment heuristics, not guarantees.
Corporate, M&A and mid-market advisory — recurring clients versus deal-flow probability.
- Separate franchise clients from “next deal” hope. A PE sponsor who has used you three times is not the same as a probability-weighted pipeline of unknown auction work.
- Sponsor panels versus portfolio-company GCs. Panel relationships are often firm-level; portco GCs can be more personal — and more rate-sensitive after a step-up.
- Public-company and multi-practice GCs frequently buy brand, conflicts systems and breadth. Model partial follow, not wholesale transfer.
- Self-test: list the last eight instructions and who initiated each call. If half came through another partner or a firm BD channel, your portable map is smaller than your deal sheet.
Litigation, arbitration and investigations — matter portability is not relationship portability.
- Lumpy revenue. Settlements, trial calendars and investigation cycles can erase year-one projections even when the relationship is real. Build an explicit bear case.
- Institutional defendants and carriers often run panels; individual trial counsel can still be sticky, but the appointment path may not be yours alone.
- Live matters frequently cannot relocate mid-stream. Do not underwrite a move on a trial that will not move with you.
- Self-test: for each active matter, ask whether the client would re-hire you for the next dispute at a new firm — not whether they are happy with the current one.
Banking, finance and capital markets — panels, credit conflicts and multi-office coverage.
- Panel and league-table dynamics make a large share of relationships firm-contingent. Ask who holds the panel seat: you, the office, or the platform.
- Credit and positional conflicts at full-service firms can shelve lender or sponsor work overnight. Run conflicts earlier than feels comfortable.
- Coverage needs (local counsel, multi-jurisdiction closings, product specialists) can keep work at the old platform even when the partner is popular.
- Self-test: which clients have already used you at more than one firm, or followed a colleague? Past transfer is stronger evidence than relationship warmth.
Private equity, IP, regulatory and other specialty practices — different stickiness engines.
- Private equity / funds: sponsor relationships can be highly personal; fund formation and financing often need platform depth. Separate sponsor loyalty from execution dependencies.
- IP: portfolio ownership and inventor relationships differ from corporate IP departments that buy firm processes. Conflicts density is high — clear early.
- Regulatory / investigations: agency credibility and industry reputation travel differently from corporate retainers; positional conflicts are common.
- Insurance: carrier and coverage work is frequently panel- and firm-driven; junior partners often move on skill, not book. Do not force a portability narrative that is not there.
Turn each client into a claim you can defend.
A portable map is a set of defensible judgments, not a spreadsheet total. Use the scorecard, then force a three-scenario number.
For each material client, mark the signals below and assign a single claim status: strong claim (after gates), conditional (band only), or do not claim. Then build three revenue scenarios — conservative, base and upside — with drivers written in plain language. Hiring partners trust a lower number you can explain more than a higher number you cannot.
| Signal | High (supports a claim) | Low (discount or strip) | How to claim |
|---|---|---|---|
| Primary GC / decision-maker contact | They call you first on new matters | You enter only after another partner or procurement | Strong claim if platform clears |
| Multi-year, multi-matter history | Repeat instructions across years and matter types | One large matter last year, little before | Supports sustainability narrative |
| Origination vs service credit | You opened and own the relationship | You are staffed onto another partner’s franchise | Service line: do not claim as portable |
| Panel / RFP dependency | Direct hire; no panel gate | Firm is on a panel; you are not personally appointed | Default non-portable |
| Rate elasticity | Client already pays near target-firm levels | Large gap to target rack / blended floors | Model attrition, not full transfer |
| Conflicts exposure at targets | Clean at realistic firms in your shortlist | Known adverse parties or industry walls | Strip from portable column |
| Team dependency | You can deliver with the target’s bench | Client expects specific associates who may not move | Conditional — name the dependency |
| Concentration | Portable revenue spread across several clients | One client is most of the “portable” story | Firms discount single-thread books |
Only primary-owned, conflicts-clear, rate-survivable clients. Live matters assumed not to transfer. This is the number you should be able to live on.
Conservative plus conditional clients with a partial-transfer assumption. Co-originated and rate-sensitive names appear here at a haircut, not at 100%.
Base plus plausible platform unlocks and stretch relationships — labelled as upside, never as the plan the guarantee is built on.
When not to claim — and how to present what you do.
Declining to claim is not weakness. Over-claiming is how partners get guaranteed, then managed out.
Once a map is honest, the presentation problem is easier. Firms expect an LPQ and often a business plan. They do not expect perfection; they expect internal consistency. A candidate who strips non-portable names, flags concentration, and shows three scenarios reads as someone who will not blow up a practice group’s hiring thesis six months in.
Shared institutional clients with strong partners remaining
If the franchise partners stay, assume the firm keeps the relationship unless you have clear primary control.
Panel-only work with no personal appointment path
Panel membership is usually a firm asset. Claiming it as your portable book misstates who the client engages.
Rate gaps the client has already resisted
If the client pushed back on increases where you sit now, they will not absorb a larger step-up silently.
Known hard conflicts at any realistic target
A client that cannot clear is not a negotiating chip. It is a non-starter — leave it out of the portable map.
Pure execution on another partner’s franchise
Excellent delivery without relationship ownership is a skill hire story, not a portability story.
Single-client books sold as a diversified practice
Concentration is fine to disclose; presenting it as breadth is how diligence unravels.
If the conservative case does not support the economics of the move — the guarantee you would need, the capital call, the lifestyle you are protecting — that is information. Sometimes the right next step is not a lateral process; it is a year of deepening ownership, diversifying concentration, or fixing a platform problem where you already sit. A good search partner will say so. For the formal documents, use our LPQ guide and business-plan guide once the scorecard is clean.
- Q1 Does the conservative case clear conflicts, rates and ownership for enough revenue to justify a move? No → do not underwrite a lateral on portability. Fix ownership or stay.
- Q2 Can you describe, client by client, why each portable name would re-engage you at a named type of platform? No → you have a collections history, not a portability map. Rebuild the scorecard.
- Q3 Are you willing to put the conservative number — not the upside — in front of a hiring partner? No → you are not ready. Over-claiming will cost more than waiting.
- → All three yes? Present the map with scenarios, then explore platforms that make the conservative case stronger — not weaker.
Declining to claim is not weakness. Over-claiming is how partners get guaranteed, then managed out.
Common questions about client portability
What is client portability, and how is it different from my book of business?
Your book of business is the revenue you currently originate or work. Client portability is the subset of that book that would realistically re-engage you at a new firm, after conflicts, rates, platform fit and relationship ownership are stripped out. Headline originations are not portable originations. Firms underwrite the second number; candidates who sell the first as if it were the second lose credibility fast.
How much of my book do firms expect me to bring?
There is no single threshold that travels across markets and practices. Public research still shows a large gap between what laterals claim and what moves: Decipher has reported average claimed client portability around 57% on LPQs with roughly verified movement closer to 35%, while Thomson Reuters Institute Stellar Performance research has found laterals bring roughly 22% of prior book on average. Those measures capture different things — do not average them into one number. What hiring partners want is an honest, client-level case, not a vanity total.
Can I ask my clients whether they will follow me before I resign?
Generally, no — not in identifying form, and not with a named destination. Professional-conduct rules and most partnership deeds restrict pre-departure solicitation and limit what you may disclose about a prospective move. Portability assessment before notice is therefore an inference exercise: relationship depth, decision rights, panel status, rate history and past behaviour when colleagues left. Client conversations about a move usually belong after you have accepted an offer and given proper notice, on terms your current firm and the ethics rules allow.
What are the most common reasons a “portable” client does not follow?
Four killers dominate: institutional stickiness (the client hires the firm brand, panel or multi-practice package, not you alone); conflicts at the target firm that shelve the matter on day one; rate-card shock when the new platform prices the relationship out of the client’s budget; and platform gaps (geography, bench, product set or regulatory coverage the old firm supplied). Secondary killers include live-matter timing, co-originators who stay behind, and procurement or board processes that re-tender counsel on any partner exit.
I am a service partner or counsel without a large personal book — does portability still matter?
It matters differently. Partners with originations are underwritten on what follows. Service partners, counsel and specialists without a portable book are underwritten on skill scarcity, practice demand and who will sponsor you. Do not invent a book you do not own — that is the fastest way to fail diligence. Be precise about the clients you influence versus those you only staff, and let the firm hire you for the role it actually needs. See our guide on whether to make a lateral move for the broader decision frame.
How should I present portability on an LPQ or business plan?
Client by client (or by tight category), with a high / medium / low judgment, a short ownership narrative, and three revenue scenarios — conservative, base and upside — not a single hero total. Strip conflicts-blocked and panel-only names from the portable column entirely. Our credible lateral partner business plan and LPQ guide walk through the formal documents firms will expect.
Every external figure on this page, with a link.
Charts that count this guide’s own lists are labelled as counts. Market figures below are published research — different measures, not one blended percentage.
Sources & further reading
11 references- Decipher Investigative Intelligence — Lateral books of business: client portability decipherintel.com ↗
- Decipher — Lateral client portability trends (2025) decipherintel.com ↗
- Thomson Reuters Institute — Stellar Performance 2023: successful lateral hires thomsonreuters.com ↗
- Thomson Reuters Institute — Forum: 3 steps to more effective lateral hiring thomsonreuters.com ↗
- ALM Intelligence / Decipher — lateral hiring underperformance (industry survey) decipherintel.com ↗
- ABA Model Rule 1.6 — Confidentiality of Information americanbar.org ↗
- Sartori & Partners — What Book of Business Portability Means ↗
- Sartori & Partners — How Portable Is a Book, by Practice ↗
- Sartori & Partners — Lateral Partner Questionnaire (LPQ) ↗
- Sartori & Partners — Credible Lateral Partner Business Plan ↗
- Sartori & Partners — Should You Make a Lateral Move? ↗
Claimed client-portability percentages (Decipher), roughly verified movement (Decipher), average prior-book transfer (Thomson Reuters Institute Stellar Performance), underperformance (~62%, ALM / Decipher) and firm-reported departures after missed books (TR Institute Forum) measure different things. Do not average them. Treat any figure you encounter elsewhere as a directional range that varies by market, practice, firm tier and year.
From assessment to materials to decision.
Portability is one diligence factor inside a larger move. These guides sit next to this one.
Should You Make a Lateral Move?
Portability is one diligence factor. Start with whether a move is the right decision at all — signals, timing and confidentiality.
Read the decision guideThe Lateral Partner Questionnaire (LPQ)
How firms will stress-test the portability map you build here — and how to answer without inflating the book.
Understand the LPQHow to Build a Credible Lateral Partner Business Plan
Turn the client-level scorecard into a three-scenario plan hiring partners can underwrite.
Build the planA quiet conversation
Not sure what you can honestly claim? Talk it through, off the record.
We help partners stress-test portability before any LPQ goes out — and we are just as willing to tell you the case is not there yet as to map a move.