Invoicing for Personal Trainers: What You Need to Know

An independent personal trainer manages three distinct financial streams on a daily basis: coaching sessions, package or subscription sales, and occasional digital products (programs, e-books). Each follows its own tax rules and requires proper documentation. This guide covers what you need to lock down — without substituting for individual accounting advice.

Required fields on an invoice

Every invoice must include a set of legally mandated fields. In France, these are defined by the commercial code and tax authority; most other countries have comparable requirements. An incomplete invoice can be challenged and may cost your business client their right to deduct the expense.

• a sequential, unbroken invoice number with no gaps or duplicates;
• the date of issue and the date the service was performed;
• your full name, address, and business registration number;
• the client's name and address;
• a precise description of the service, quantity, and unit price (excl. tax);
• the applicable VAT rate, or a statement such as "VAT not applicable" with the relevant legal reference if you fall under a small-business exemption;
• payment terms, late-payment penalties, and any fixed compensation for recovery costs;
• due date.

VAT and small-business exemptions

Many countries offer a revenue threshold below which self-employed professionals are exempt from charging VAT. In France, this is known as the franchise en base regime. As long as your annual turnover stays below the applicable threshold (checked yearly with your tax authority), you do not charge VAT and must state this on your invoice. Once you exceed the threshold, standard VAT rates apply to coaching services. A specific exemption also exists in France for teachers delivering courses personally (article 261-4-4° of the tax code), but the exact conditions require individual verification with an accountant. If you operate outside France, check your local equivalent — the principle is similar across most European jurisdictions.

Partial payments: the right approach

Selling packages or subscriptions often means collecting payment in installments. The practical framework:

Integrated tool vs. spreadsheet + separate invoicing

Handling late payments and non-payment

In direct-to-consumer coaching, non-payment is relatively rare — but it does happen. The standard escalation:

• a friendly reminder at 7 days past due (message or email);
• a formal written reminder at 15 days (email with read receipt);
• a formal notice at 30 days (registered letter, referencing applicable penalties);
• escalation via a small claims process or a dedicated debt recovery platform.

For B2B clients (companies paying for employee coaching), late-payment compensation is often legally owed automatically once the due date passes. In France this is a fixed €40 indemnity under article L441-10 of the commercial code. Its mention on the invoice is mandatory. Check the equivalent rule in your jurisdiction.

Retention and archiving

Invoices — both issued and received — must typically be retained for 10 years in a format accessible to tax authorities. In France, a timestamped digital archive is accepted; a plain PDF sitting in an email inbox may not be sufficient during an audit. A dedicated tool handles this automatically.