Interim Lawyer, Law Firm or Permanent Hire?

Short answer: Specialised interim legal counsel work inside the in-house legal team, take on day-to-day matters and are directed by the company; traditional law firms give independent advice on defined matters and represent the company externally. Interim counsel close a capacity gap in the team, while a law firm delivers a defined advisory service. A permanent hire is the right choice when the need is ongoing.

This comparison is written for general counsel, heads of legal and HR leaders in Germany, Switzerland and Austria who face a concrete decision: a role is vacant, a colleague is going on parental leave, a project is tying up the team or the contract backlog keeps growing. It explains how the three options differ, when each one fits and how they can be combined.

Interim lawyer, law firm or permanent hire: the key differences

The three options solve different problems. What matters is not which looks cheaper or faster, but what kind of work needs to be done and who directs it.

Interim legal counsel

Typical trigger: vacancy, absence, peak workload, project or backlog.
Role: works inside the team and handles day-to-day matters.
Direction: under staff leasing, the company gives the professional instructions; under freelancing, the specialist works independently within the agreed scope.
Billing: hourly or daily rate for the agreed capacity.
Scope: part-time or full-time, one person or a team.
Knowledge: stays in the team through documentation and handover.
Limit: no independent advice as a law firm, no representation in court.

Law firm

Typical trigger: a legal question that needs advice or representation, a dispute, a transaction.
Role: advises from outside on a defined matter.
Direction: the company instructs the firm, the firm runs the matter.
Billing: often time-based per matter or a fixed fee.
Knowledge: sits in the matter file and the work product.
Limit: little integration into internal processes; for recurring work, cost rises with every request.

Permanent hire

Typical trigger: an ongoing need or growing the team.
Role: part of the team with long-term responsibility.
Direction: the company as employer.
Cost: salary, employment costs and recruitment.
Limit: the search takes time; it rarely suits temporary peaks.

When is an interim lawyer the right choice?

Interim legal counsel fit when the work should stay in-house but capacity or specific expertise is missing. Typical situations:

A key person is away: parental leave, maternity leave, illness or a sabbatical. The cover takes over current matters and hands them back on return.
A role is vacant: recruitment is under way, but the work has to continue.
The team is at capacity: a transaction, a contract project or a regulatory change is tying up the existing lawyers.
The backlog is growing: contracts, reviews or business requests are piling up.
Expertise is missing in-house: for example in data protection, employment law or corporate/M&A.

The advantage is integration: the specialist works with the company's systems, templates and contacts. Knowledge and work product stay in the legal department.

When does the work belong with a law firm?

A law firm is the right choice when the company needs an independent outside view or must be represented before courts and authorities. Typical cases are disputes, opinions on new or contested legal questions, larger transactions and questions under a foreign legal system.

Law firms work matter by matter. For recurring work such as routine contract review or advising business units, they are usually less integrated into internal processes, and costs grow with each request. Some firms offer retainers or secondments for this; even then, the company still has to decide who prioritises the work and who takes it over when the arrangement ends.

When is a permanent hire the right answer?

If the need is ongoing and comes with long-term responsibility, a permanent appointment is the right target structure. Interim support can bridge the time until the new hire starts and prepare the handover.

How interim legal counsel and law firms work together

In practice the options are rarely exclusive. A combination often works best:

The law firm resolves a strategic legal question; the interim counsel puts the outcome into practice, for example in contract templates.
In a transaction, an interim specialist inside the company coordinates the law firms involved and keeps internal teams informed.
Routine work previously sent to law firms is handled in-house during a capacity gap, while the firm remains responsible for specialist questions.

Comparing costs: what legal departments should look at

Comparing hourly rates alone falls short. It is more useful to look at the whole task:

Type of work: recurring tasks that need internal context are usually handled more efficiently in the team than through individual matters.
Scope and duration: workload, term and seniority drive the cost of an interim engagement.
Onboarding and handover: time for both belongs in every plan.
Cost of delay: work left undone creates risk and extra effort later.

How to build a transparent interim budget is explained in Budgeting for interim legal and compliance support.

Checklist: seven questions for the decision

Is the need ongoing, or does it end with a return, a new hire or project completion?
Do you need someone to work inside the team or independent outside advice?
Does the company need representation before courts or authorities?
Which tasks are being left undone today, and which deadlines are affected?
Which expertise and seniority are essential, from junior to senior?
Who sets priorities and gives professional instructions?
Who takes over the work after the engagement, and how is it handed over?

If the answers point to work inside the team with a foreseeable end, interim support is the natural fit. If independent advice or representation comes first, you need a law firm. If the need is ongoing, the answer is a permanent hire.

Limits and risks of the interim option

Interim legal counsel do not replace a law firm: Alpinum Solutions provides legal and compliance professionals and does not give legal advice as a law firm.
Without a clear brief, the engagement loses time. Tasks, priorities and contacts should be agreed before the start.
Formal functions such as data protection officer or MLRO are possible, but depend on the company's requirements and the rules in Germany, Switzerland or Austria. Clarify this before the engagement starts.
An engagement that ends without a handover loses knowledge. Documentation is part of the brief from day one.

Example: parental leave cover instead of law firm instructions

An international industrial company in the DACH region needed cover for a senior legal counsel going on parental leave. Alpinum Solutions presented selected profiles within 48 hours. A senior legal counsel took over the role for nine months, including a one-month handover alongside the incumbent. The engagement ran under staff leasing, reporting to the in-house legal department and the head of legal.

The interim counsel handled day-to-day advice to business units, contract management and support for operations. The legal department stayed fully operational, and spend on external law firms fell significantly. (Anonymised example from an Alpinum engagement.)

Next steps

Alpinum Solutions provides interim legal and compliance professionals to companies in Germany, Switzerland and Austria: through staff leasing or freelancing, part-time or full-time, as a single specialist or a project team. The company directs the engagement. Selected profiles are usually available within 48 hours; the start date is agreed jointly by the company and Alpinum.

As of 18 October 2026. This article is a decision aid, not legal advice.

You can find more interesting articles on this topic here:

How does an interim legal assignment work? Seven steps

Interim compliance support

Interim lawyer, law firm or permanent hire? A comparison for legal departments