How law firm partnerships allocate profit

In a traditional partnership or LLP, net profit is not "paid out" like a salary. It is first allocated among the partners according to a pre-agreed profit-sharing arrangement, and only then does each partner calculate and pay their own personal tax on their share. This makes the tax position of a law firm partner fundamentally different from that of an employee.

This guide explains the main allocation methods, how they affect take-home, and what a move to a limited-company model would change. All figures in the model trace to the current UK tax rates.

Allocation methods

Fixed ratio

Every partner holds a percentage of the equity. Net profit is split in those percentages. This is simple to administer but can feel inequitable when partners have very different billing contributions or client portfolios. It tends to suit firms where origination is relatively diffuse or where cultural solidarity matters more than individual attribution.

Two-tier model

The two-tier model assigns each partner a weighting: typically "senior equity" (higher points) and "junior equity" (lower points). Profit is divided by the total number of points to produce a value per point, and each partner receives that amount multiplied by their points. The model in the accompanying workbook uses a 1.5/1 weighting for senior and junior partners respectively.

This is the most common structure in mid-market UK law firms because it preserves a meaningful seniority premium without requiring the partners to agree individual fee targets or origination credits. It is also straightforward to model when new partners are admitted or existing partners retire.

Lockstep

In a pure lockstep model partners progress through fixed "points" based on tenure. A newly made partner might start at 50 points and add 10 points each year until they reach the full equity level. This model is strongly egalitarian (no origination credit, no billing bonus) and is associated with elite Magic Circle and Silver Circle firms where the culture is one of institutional client ownership rather than individual rainmaking. It is increasingly uncommon in mid-market firms that have moved to merit-based systems.

Eat what you kill / merit-based

Each partner is credited with the revenue they personally generate (and sometimes the clients they maintain), and their share reflects that contribution directly. This is the most common model in US-style law firms and in UK firms that have grown by lateral hiring. It maximises incentive alignment at the cost of administrative complexity and can, at the extreme, undermine cross-referral behaviour.

The model in the workbook covers fixed-ratio and two-tier methods. Merit-based models require bespoke data inputs (origination credits, billing hours, client retention weightings) that are firm-specific.

Personal tax for partners: the basics

Each partner is self-employed for tax purposes. They are assessed on their allocated share of the firm's profits for the tax year in which the firm's accounts end. They pay this via Self Assessment.

Income tax

The 2026/27 rates are:

  • Personal allowance: £12,570 (tapered above £100,000; eliminated above £125,140)
  • Basic rate: 20% on income from £12,571 to £50,270
  • Higher rate: 40% on income from £50,271 to £125,140
  • Additional rate: 45% on income above £125,140

A partner on a £120,000 allocation pays 45% on no income (below the additional-rate threshold), but does lose a portion of the personal allowance taper. The model calculates this precisely.

National Insurance

Partners pay Class 2 and Class 4 National Insurance as self-employed individuals.

  • Class 2: flat rate of £3.45 per week (from April 2026 rate - check your accounts for the current rate)
  • Class 4: 6% on profits between the Lower Profits Limit (£12,570) and the Upper Profits Limit (£50,270); 2% on profits above £50,270

Class 4 at 2% on the higher tranche is not trivial on a large profit allocation. A partner on £120,000 pays Class 4 NI of approximately £2,256 on the first tranche and a further £1,395 on the amount above the Upper Profits Limit.

Partnership versus limited company: the structural choice

A partner who is also a director-shareholder of a limited company has a fundamentally different tax profile. The company pays corporation tax (25% on profits above £250,000; marginal relief below that) and the individual extracts income as a salary plus dividends. Dividends are taxed at lower personal rates than earned income, and there is no Class 4 NI on dividends.

The workbook models both structures side by side: the same gross profit allocated as either partnership income or paid out as a director's salary-plus-dividend combination. At profit levels above roughly £60,000 per year, the limited-company structure tends to reduce the individual's tax burden, but the saving narrows at higher profit levels as the dividend rates (10.75% / 35.75% / 39.35% from April 2026) and the 25% corporate tax rate interact.

The comparison is not only about rates. A partnership allows flexibility in allocation that a company does not (you can vary a partner's points; a company must pay dividends pro-rata to shareholding, and varying this requires separate share classes with their own compliance overhead). Professional indemnity, legal professional privilege and client trust considerations also differ between structures. The right structure is a decision for each firm and its partners together with specialist tax and legal advice.

Using the partner profit model

The accompanying workbook has three sheets:

  • Profit allocation: enter the firm's net profit, the number of senior and junior equity partners, and the weighting method. The sheet distributes profit and shows each tier's share per partner and in aggregate.
  • Personal tax (partnership): enter any individual partner's allocated share and pension contribution. The sheet calculates income tax, Class 4 NI and net take-home using 2026/27 rates.
  • Personal tax (limited company): the same gross profit, modelled as director salary plus dividends. Uses the FA 2026 corporation tax rate and 2026/27 dividend rates (10.75% / 35.75% / 39.35%).

The Rates sheet is locked and matches the online calculator. You cannot edit the tax constants, which means the model and the website tool always agree.

Getting advice for your firm

Profit-sharing arrangements have legal and tax implications that interact with your partnership agreement, your LLP members' agreement and your professional indemnity cover. This guide and the model are a starting point for a structured conversation with a specialist, not a substitute for firm-specific advice. If you would like to talk through your firm's structure, the first call is free.