· Información legal
Can I claim compensation for my lawyer’s negligence?
When you hire a lawyer, you entrust them with the defence of something that matters to you: your money, your home, your business or your peace of mind. This gives rise to a legitimate question: if things go wrong, is it always the lawyer’s fault? When can you claim compensation from them?
It is worth starting with a key idea. A lawyer’s obligation is, traditionally, an obligation of means and not of result: they do not guarantee winning the proceedings, but they must bring all their technical knowledge and all the diligence to be expected of a competent professional. When a lawyer departs from those standards — the so-called lex artis, the rules of the trade — an obligation to compensate the client for the harm caused may arise.
The truth is that the case law of the Spanish Supreme Court and the Provincial Courts of Appeal has traced with considerable clarity when professional civil liability exists and what losses are genuinely compensable. Let us look at this through real cases.
When is a lawyer liable for negligence? The obligation of means and the lex artis
A lawyer does not guarantee the success of judicial proceedings, but they do assume the duty to deploy all the technical knowledge and professional diligence that can reasonably be demanded of a qualified legal practitioner. Liability arises when the harm suffered by the client is a consequence of conduct that departs from the basic rules of the profession.
The Spanish Supreme Court recalled this in its Judgment 600/2013, of 14 October. In that case, a lawyer, when claiming compensation arising from an accident, omitted relevant heads of damage (supplementary moral damages, home adaptation, disability and family losses). The Chamber found that the lawyer had failed to comply with the technical rules of their profession and that this had caused direct financial harm to their client.
The lesson is simple: it is not enough merely to act; one must act correctly from a technical standpoint.
Allowing a claim to become time-barred: the most common form of lawyer negligence
Probably the most common scenario of professional liability is losing a legal action because the statutory time limits have expired — that is, allowing the claim to become time-barred.
The Provincial Court of Appeal of Álava, in its Judgment 505/2015, held a lawyer liable for allowing a compensation claim arising from an accident to become time-barred. The lawyer had initially made some out-of-court demands but took no action that effectively interrupted the limitation period before it expired. The judgment puts it in these terms:
«He was aware of the limitation period affecting the action and of the possibility of interrupting it, as well as of the risks of exercising it out of time.»
The Provincial Court of Appeal of Barcelona reached a similar conclusion in its Judgment 351/2019, finding professional negligence in allowing a non-contractual liability claim to become time-barred: the lawyer had allowed more than a year to pass without filing a claim or taking any step to interrupt the limitation period. One important detail: the judgment stressed that the prospects of success of the frustrated action had been very high, and this was decisive in fixing the amount of compensation.
Loss of a procedural opportunity: how compensation is calculated
This is where one of the most important concepts in this field comes into play: loss-of-chance damage.
It is not always possible to assert that, had the lawyer acted properly, the client would have won. But it can be established that the negligence deprived the client of a real possibility of obtaining a favourable outcome. And that, in itself, is compensable harm.
The Spanish Supreme Court has developed a solid body of doctrine on this concept. In its Judgment 282/2013, of 22 April, it declared the liability of a lawyer whose conduct prevented her client from preserving their legal position as a creditor with a right over property, by failing to apply in time for certain interim measures.
The key lies in how compensation is calculated. The Chamber explained that this must be done by means of a prospective assessment — that is, by evaluating what real prospects of success the frustrated action had. In other words, the courts do not automatically award the full amount the client was seeking, but rather the economic value of the lost opportunity.
Defectively lodged appeals: compensation for moral harm
Another frequent source of liability arises when a lawyer forfeits a right of appeal through technical or procedural errors.
A leading authority is Spanish Supreme Court Judgment 633/2005, of 14 July, which held a lawyer liable whose appeal for the unification of doctrine was declared inadmissible due to formal defects in its preparation.
The Supreme Court introduced a point of considerable importance here: the compensation should not be equivalent to the financial benefit that might have been obtained, but rather to the moral harm resulting from having lost the possibility of having the appeal examined at all. This doctrine has since been repeated in numerous decisions, which consistently draw a distinction between two levels:
- The hypothetical outcome of the proceedings.
- The real opportunity that was lost through the negligent conduct.
Duty of information and advice: another source of a lawyer’s civil liability
Professional diligence does not end with procedural conduct. It also encompasses an adequate duty to inform and advise the client.
The Provincial Court of Appeal of Madrid, in its Judgment 57/2019, examined a case in which a lawyer devised an incorrect tax strategy in a self-assessment for Inheritance Tax, which ultimately resulted in an administrative penalty being imposed on his clients. The significant point is that the lawyer had warned that the Tax Authority might disagree with his approach, but he did not adequately inform the clients of the real risk of a penalty. The Court found that there was a causal link between that deficient advice and the harm suffered.
The judgment also offers a very interesting observation: if a client seeks to pursue a course of action that is legally incorrect, the lawyer must not simply go along with it; they must refuse or even withdraw from the retainer. Honesty and rigour must take precedence over pleasing the client.
Is a clause preventing you from making a claim against your lawyer valid?
The answer is no, where such a waiver amounts to an abusive limitation of the client’s rights. This was declared by the Spanish Supreme Court in its Judgment 192/2021, of 6 April.
The case concerned a clause, drafted unilaterally by a lawyer, by which the client waived the right to bring professional civil liability claims. The Supreme Court declared that clause void as abusive, on the basis that it unjustifiably restricted the rights of a consumer in the event of professional default.
The judgment underlines something important: the engagement of legal services is also subject to consumer and user protection legislation where its requirements are met.
What damages can you claim against a negligent lawyer?
For a civil liability claim against a lawyer to succeed, case law requires three elements:
- Conduct contrary to the professional lex artis.
- The existence of actual harm.
- A causal link between the two.
On that basis, the courts generally distinguish three types of compensable harm:
- Financial loss: where it can be established that the negligence deprived the client of a specific or highly probable economic benefit.
- Loss of chance: where the success of the frustrated proceedings cannot be guaranteed, but it can be shown that there were reasonable prospects of obtaining a favourable outcome.
- Moral harm: particularly common where an appeal is lost, defective procedural steps are taken, or legitimate expectations are frustrated.
Conclusion: when a lawyer’s negligence gives rise to a right to compensation
A lawyer’s civil liability does not arise simply because proceedings end badly. Legal work always carries a degree of uncertainty that makes it impossible to guarantee results.
That said, when a lawyer fails to meet the minimum standards of diligence — allowing claims to become time-barred, missing appeal deadlines, providing incorrect advice, or depriving the client of reasonable procedural opportunities — an obligation to pay compensation may arise. Recent case law points in a clear direction: ever greater diligence, transparency and client information are being demanded.
| Type of negligence | What case law says | Decision |
|---|---|---|
| Omitting heads of damage | Breach of lex artis: liable for the loss caused | TS 600/2013 |
| Allowing the claim to become time-barred | Compensable professional negligence | AP Álava 505/2015 · AP Barcelona 351/2019 |
| Depriving the client of a procedural opportunity | Compensation for the value of the lost opportunity | TS 282/2013 |
| Appeal declared inadmissible due to formal defects | Moral harm for loss of the right of appeal | TS 633/2005 |
| Deficient advice and information | Liable where there is a causal link to the harm | AP Madrid 57/2019 |
| Clause waiving the right to claim | Void as abusive against a consumer | TS 192/2021 |
If you believe that a lawyer’s conduct has caused you harm, it is advisable to have the matter reviewed by a civil liability lawyer in Madrid. At Trigo Buide we analyse your case with rigour and honesty before taking any step: we assess whether the requirements for professional civil liability are met, evaluate the real prospects of success, and advise you clearly on the best course of action — whether that is negotiation or a formal claim.
Frequently asked questions about a lawyer’s civil liability
Is my lawyer liable if I lose the case? Not simply because of losing. Their obligation is one of means, not of result: they do not guarantee success, but they must act with the required technical diligence. They are only liable if they depart from the lex artis and that causes you harm.
What happens if my lawyer allowed my claim to become time-barred? This is one of the clearest examples of professional negligence. The courts (including the Courts of Appeal of Álava and Barcelona) have held lawyers liable for allowing time limits to expire without interrupting the limitation period, particularly where the frustrated action had strong prospects of success.
What is loss of chance and how much compensation can be awarded? It is the harm you suffer when negligence deprives you of a real possibility of winning, even if success was not certain. The compensation is not the full amount you were seeking, but the value of the lost opportunity, calculated according to the real prospects of success your action had (prospective assessment).
Can I claim for moral harm alone? Yes. In cases such as the loss of an appeal due to formal defects, the Spanish Supreme Court has awarded compensation for the moral harm resulting from losing the possibility of having the matter examined, irrespective of the financial outcome that was being sought.
I signed a clause waiving the right to claim against my lawyer — is it valid? Not necessarily. The Spanish Supreme Court has declared such a clause void as abusive where it unjustifiably restricts the rights of a consumer client. The engagement of legal services is also protected by consumer legislation.