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Find a Lawyer » Canada Legal Guides » Ontario Legal Guides » London Legal Guides » Criminal Defence & Traffic Offences London » DUI & Impaired Driving Defence London » How much does it cost to defend an impaired driving charge in London?

How much does it cost to defend an impaired driving charge in London?

16 May 2026 3 min read No comments DUI & Impaired Driving Defence London
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Defending an impaired driving charge in London, Ontario generally costs between $3,500 and $10,000+ CAD in legal fees. When you factor in mandatory court fines, towing, the “Back on Track” program, and increased insurance, the total financial impact of a conviction can easily exceed $20,000 CAD.

Being arrested for impaired driving is an incredibly stressful experience that brings immediate financial and legal concerns. If you were pulled over by the London Police Service and blew “over 80” or were charged with impaired operation, your first thought is likely about the cost of fighting the charge.

Understanding the legal billing structure can help you choose the right law firm to protect your driving privileges. Whether you resolve the matter early or go to trial at the Dundas Street courthouse, this guide breaks down the typical expenses of defending against an impaired driving offence in London.

Step-by-Step Process in London

Defending an impaired driving charge requires specialized legal knowledge. Most applicants in Ontario follow a structured legal path to ensure their rights are protected. 📋

Step 1: The Initial Consultation

Your first step is meeting with a local criminal defence lawyer. Many law firms in London offer a free or low-cost initial consultation (around $100 to $300 CAD). During this meeting, the lawyer will explain the charges, review any immediate paperwork, and quote you a block fee for their services.

Step 2: Gathering and Reviewing Disclosure

Once retained, your lawyer will request the “disclosure” (evidence) from the Crown Attorney. In an impaired driving case, this includes police notes, breathalyzer calibration logs, and roadside body-cam footage. Analyzing this technical data is crucial for building a strong defence.

Step 3: Crown Pre-Trial and Negotiations

Your lawyer will schedule a Crown Pre-Trial (CPT) to discuss the evidence with the prosecutor. If the police made a mistake, such as violating your Charter rights during the traffic stop, your lawyer may use this to negotiate a reduced charge, like careless driving, instead of a criminal conviction.

Step 4: Proceeding to Trial

If a fair resolution cannot be reached, you will proceed to trial at the Ontario Court of Justice. This is the most expensive part of the process, as your lawyer will spend hours preparing cross-examinations and may bring in expert witnesses to challenge the breathalyzer results. 🔍

How Much Does it Cost in London?

Legal fees are just one part of the financial picture. Here are the typical costs associated with an impaired driving charge in Canadian dollars (CAD):

  • Lawyer Retainer (Resolution): If your case is resolved without a trial (e.g., a plea deal or dropped charges), expect to pay between $3,500 and $6,000 CAD.
  • Lawyer Retainer (Trial): Taking an impaired driving case to a full trial generally costs $7,000 to $12,000 CAD or more.
  • Expert Witnesses: Hiring a toxicologist to challenge the blood alcohol readings can add $2,000 to $5,000 CAD to your legal bill.
  • Conviction Penalties: If convicted, you face a minimum mandatory fine of $1,000 CAD, an additional victim surcharge, the $344 fee for the mandatory Back on Track program, and thousands in increased auto insurance premiums over the next few years.

How Long Does the Process Take?

An impaired driving case rarely resolves overnight. If your lawyer negotiates a quick plea deal or diversion, the process might wrap up in 3 to 6 months. However, if you are fighting the charges at a full trial, the backlog at the London courthouse means your case could take 12 to 18 months to conclude. During this time, your administrative driver’s licence suspension may remain in effect, making it vital to plan for alternative transportation. ⏱

Frequently Asked Questions (FAQ)

Is it cheaper to just plead guilty right away?

While pleading guilty saves on immediate lawyer fees, the long-term costs of a criminal record, suspended licence, and sky-high insurance premiums are usually much more expensive than hiring a lawyer to fight the charge.

Do London defence lawyers offer payment plans?

Yes. Many local law firms understand that impaired driving charges are an unexpected financial burden and will offer monthly payment plans to cover their block fees.

Will Legal Aid Ontario cover my DUI defence?

Generally, Legal Aid Ontario only covers criminal charges if there is a strong likelihood of jail time. For a first-time impaired driving offence, it is very difficult to qualify for a Legal Aid certificate.

What is a block fee?

A block fee is a flat rate charged by a lawyer for a specific stage of your case (e.g., $4,000 to take the case up to the trial stage). This provides cost certainty compared to an hourly billing rate.

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