Substance abuse and addiction in the workplace

Addiction in the workplace is largely invisible, not because people aren’t struggling, but because most people who are struggling are still showing up.                                                                                                                                                      

When the problem does surface, the typical responses on both sides tend to make things worse. Employees stay silent, often until the situation is impossible to conceal. Employers reach for discipline when support would be both more effective and, under South African law, legally required.

Here’s what workplace addiction actually looks like, why it tends to go unaddressed, and what both employees and employers can do about it.

What addiction in the workplace actually looks like

According to the US Substance Abuse and Mental Health Services Administration (SAMHSA), roughly seven in ten people with a substance use disorder (SUD) are employed. Most of these employees appear to be functioning normally. They attend meetings, meet deadlines, and carry their dependence out of sight, sometimes for years. 

Clinicians call this ‘high-functioning addiction’: substance dependence in people who meet their targets, maintain relationships, and give colleagues little obvious reason for concern. The substance dependence is real, but the signs are easy to miss.

Addiction in the workplace tends to become apparent as a pattern of subtle changes rather than a single incident. Changes worth noting include:

• A decline in work quality or reliability, particularly around deadlines
• Increased absence, especially on Mondays or after high-stress periods
• Withdrawal from team activities or colleagues with whom the person was previously close
• Irritability or erratic mood, particularly in the mornings or late in the day
• Difficulty with focus or short-term memory
• Recurring financial stress or requests to borrow money
• A pattern of minor accidents, near-misses, or lapses in safety awareness

None of these signs is conclusive in isolation. Taken together, or where a pattern persists over weeks or months, they may warrant a careful, private conversation.

How work can contribute to substance use

Work doesn’t just reveal addiction. For many people, the working environment actively drives substance use. Several features of working life create conditions where substance use can escalate.

• Performance pressure. High-pressure roles with demanding targets and long hours are associated with elevated rates of stimulant and alcohol use. Substances become a way to sustain energy, sharpen focus, or get through a punishing stretch of work.
• Industry culture. In sectors where client entertainment, late nights, and social drinking are professional norms, including hospitality, finance, sales, and creative industries, heavy consumption can be both normalised and actively encouraged.
• Self-medication. Many people use alcohol or prescription medication to manage anxiety, decompress after sustained stress, or cope with workplace conflict. The line between unwinding and relying on a substance to function shifts gradually and isn’t always obvious to the person crossing it.

Most people who begin using substances in this way aren’t making a conscious decision to become dependent. The escalation is gradual, and by the time dependence sets in, the original trigger is just one part of a larger, more entrenched pattern. 

Our article on trauma and addiction explores how chronic stress and emotional pain connect to substance use in more depth.

The cost of addiction for employers

Substance use disorders cost organisations more than most employers account for, and the costs that are hardest to see are often the largest.

• Absenteeism. Employees with substance use disorders are significantly more likely to take unplanned leave, particularly after high-stress periods or weekends. The pattern often becomes visible to colleagues before it reaches management.  
• Lost productivity. An employee with an unmanaged substance use disorder may turn up every day and still work well below their capacity. Presenteeism typically costs organisations more than absence, and it’s harder to see.
• Safety incidents. In roles involving machinery, driving, or patient care, an impaired employee puts themselves, their colleagues, and members of the public at risk.
• Team morale. Colleagues are usually the first to notice a problem and the last to say anything. Covering for someone, absorbing their workload, or managing around their erratic behaviour takes a toll on the whole team over time, even when no one names the cause.
• Staff turnover. Whether the outcome is dismissal or resignation, replacing an employee costs significantly more than supporting them through treatment. Recruitment, onboarding, and lost institutional knowledge are expenses that rarely appear on the same line as the original problem.

These costs rarely appear as a single line item. They accumulate quietly over months or years, which is part of why so many organisations underestimate the scale of the problem until it’s already past the point of easy resolution.

Why employees don’t come forward

Most employees with a substance use disorder don’t tell their employer. Three things drive that silence: 

• Fear of losing their income. Dismissal is the primary concern, and it’s not an irrational one. Most employees don’t know that South African labour law limits an employer’s ability to dismiss someone solely for having a substance use disorder. The prospect of losing their income keeps most people silent, even when they recognise that their use has become a problem.                               
• Stigma. Addiction is still widely seen as a moral failing rather than a health condition. Disclosing a substance use disorder to an employer feels different from disclosing a physical illness. The reaction is harder to predict, and the judgement harder to shake. 
• Denial. Minimising the extent of one’s own substance use is a recognised feature of addiction. Many employees with addiction genuinely believe their substance use is under control, or that it hasn’t yet reached a level that warrants disclosure — even when the evidence suggests otherwise. 

The result is that many employees delay coming forward until the problem is impossible to conceal, rather than reaching out when earlier support could still have made a real difference.                                                                                            

Getting help while you’re still employed

Seeking help doesn’t have to mean leaving your job, disclosing anything to your employer, or paying out of pocket. In practice, the main obstacles to getting help are smaller than most employees assume. 

Here’s what’s worth knowing:

• Your job is protected. South Africa’s Labour Relations Act (LRA) classifies substance dependence as incapacity, not misconduct. Your employer cannot legally dismiss you solely for having a substance use disorder. The law requires them to give you a reasonable opportunity to access treatment before any disciplinary process begins.
• Treatment is covered by your medical aid. Substance use disorders are Prescribed Minimum Benefits under South African law, which means your medical aid must fund treatment. Many employees aren’t aware of this. You can find scheme-specific information on our medical aid rehab cover page.
• You may not need to involve your employer at all. If your employer offers an employee assistance programme, it may provide a confidential route to assessment and referral without involving your line manager or HR team. You can also contact Houghton House’s admissions team directly, with no employer involvement required.
• Treatment doesn’t always require time away from work. Outpatient treatment allows you to attend therapy sessions during the day or evenings while continuing to live at home and, in many cases, remain employed. For more severe addiction, inpatient rehabilitation provides a more intensive level of care over a standard 30-day programme, with the option to extend to 42 days when clinically necessary.

The earlier you seek support, the more options are open to you. Waiting until the problem is undeniable narrows your treatment choices and puts your employment at greater risk.

For managers and HR teams

When an employee’s performance or behaviour deteriorates, the instinct is to manage it through progressive discipline. In cases involving substance dependence, that instinct is understandable, but it’s often the wrong call, and it carries legal risk.

Because the LRA classifies substance dependence as incapacity rather than misconduct, dismissing an employee for substance-related performance issues without first offering a genuine opportunity for treatment exposes the organisation to an unfair dismissal claim. The legally correct process involves assessment, support, and a clear return-to-work plan.

There’s also a straightforward business case for supporting treatment. An employee who completes rehabilitation and returns to work is typically more productive and more committed than a new hire at the same stage. Recruiting and onboarding a replacement costs considerably more than supporting a 30-day programme, and the institutional knowledge the employee holds doesn’t transfer with them.

For a full guide to your legal obligations, how to approach the initial conversation with an affected employee, and how to manage return to work after treatment, read our practical guide to supporting employees with addiction.

If building a recovery-supportive culture across your organisation is a priority, Houghton House’s corporate addiction programme offers tailored management training and staff education sessions, delivered in-person or online, nationwide.

Talk to our team

If you’re concerned about your own substance use, or are trying to find the right support for a staff member, Houghton House’s admissions team can help. We can talk through what level of care makes sense, how treatment might work around your circumstances, and what medical aid will cover.

Calls are confidential, with no commitment required. Our team is available around the clock. Call us on +27 79 770 7532 or get in touch via our contact form, and we’ll get back to you.