Optician: splitting VAT between lenses (5.5%) and frames (20%)

Quick answer. A single pair of glasses combines two VAT rates. Corrective lenses, as prescribed medical devices, fall under the reduced 5.5% rate, while frames fall under the standard 20% rate. The optician must split the taxable base between these two parts, without undervaluing the frame.

An optician's invoicing is not a uniform VAT case. The same pair of glasses mixes two rate regimes, and that very coexistence, like any invoice that combines several VAT rates, is what creates the risk. In practice, many stores think in terms of a global selling price for the equipment, whereas the tax authority thinks in terms of an apportioned base. The gap between the two is exactly where adjustments arise.

This guide explains how to correctly split the base between lenses and frames, how to document the apportionment on the invoice, and which store products fall outside the reduced rate. It is intended for independent opticians as well as managers of several outlets who want to secure their VAT return.

The basic principle is easy to state but heavy with practical consequences: a standard optical equipment is not sold under a single rate. Corrective lenses, because they are medical devices supplied on prescription, benefit from the reduced 5.5% rate. The frame, on the other hand, is a consumer good taxed at the standard 20% rate.

The accounting consequence is direct: as soon as a sale includes both components, the taxable base must be split into two differently taxed parts. There is no question of applying an average rate or keeping the most favourable rate for the whole.

The most common mistake is to invoice the complete equipment at 5.5% on the grounds that the lenses "pull" the transaction towards the medical regime. That is incorrect: the frame keeps its own regime, whatever the way the price is presented to the customer.

Why apportionment is an obligation, not an option#

When goods subject to different rates are sold for a flat price, the base must be allocated across each rate. This allocation is not left to free commercial judgement: it must reflect the actual value of each component.

An apportionment that systematically undervalues the frame to inflate the lens share can be reclassified. The authority can reconstruct a frame base consistent with market prices and apply a VAT adjustment on the difference, together with interest.

This table sets a sorting rule: correction, on prescription, opens the reduced rate; anything relating to comfort, aesthetics or maintenance stays at 20%.

The correct apportionment of a complete equipment sale follows a stable logic, whatever the displayed price or the way it is presented to the customer.

1. Identify the components of the sale. Distinguish the corrective lens share (5.5%) from the frame share (20%), and isolate any accessories or ancillary services taxed at 20%.
2. Assign the correct rate to each part. Attach each component to its regime: corrective lenses and contact lenses at the reduced rate, frame and accessories at the standard rate.
3. Value the frame at its real market price. Take a frame value consistent with its usual selling price outside the package, without undervaluing it to artificially shift base towards the reduced rate.
4. Calculate VAT for each part. Apply 5.5% to the lens base and 20% to the frame base, then add them up to obtain the total VAT of the equipment.
5. Keep the detail on the invoice. Show the apportionment, or keep the detail in your system, so that you can justify the allocation if requested.

A documented apportionment is worth more than one that is "correct but invisible": it is the supporting record, not the mental arithmetic, that holds up under an audit.

Take an equipment sold for 300 euros including all taxes, made up of lenses and a frame whose usual market price is 100 euros including tax.

This example shows the stakes: invoicing the whole at 5.5% would have understated the VAT collected on the frame. Conversely, valuing the frame at its real price gives a solid frame base and a defensible return.

The amounts above illustrate the method and must be adjusted to your actual prices.

Some store items are always at 20%, even when they sit alongside corrective lenses on the same sale. Confusing them with medical devices is a classic source of VAT discrepancy.

• Frames sold on their own, without corrective lenses.
• Sunglasses without correction, which remain a comfort product.
• Cases, cleaning cloths and maintenance products.
• Fashion accessories and branded items without correction.
• Any ancillary, non-medical service invoiced separately.

Conversely, corrective contact lenses follow the lens regime: reduced 5.5% rate, because they are corrective medical devices.

The issue is not so much the calculation as the traceability. The reduced rate on lenses is not up for debate, nor is the standard rate on the frame. What is debated in an audit is the value attributed to the frame in a global-price sale.

Our recommendation fits in one sentence: value the frame as if you were selling it on its own. A frame that "is worth" ten euros in a package but eighty euros as a single item signals a base shift. It is that gap, not the principle of the reduced rate, that the authority comes to examine.

The most frequently overlooked risk is not the rate itself, but the internal consistency of prices. An optician who offers frames at an attractive price within packages but invoices the same models far more expensively as single items creates, sometimes unintentionally, a presumption of a slanted apportionment.

This inconsistency is readable in the till and stock data. It does not require a complex investigation to be detected: a simple cross-check between package price and unit price is enough to open a discussion on the taxable base.

In optical apportionment, the audit focuses on the value of the frame and its consistency. A frame share abnormally low against the market and against your own unit prices draws attention, because it mechanically increases the share at the reduced rate.

The authority can then reconstruct a consistent frame base and apply the corresponding VAT adjustment. The discussion almost never concerns the right to the reduced rate on lenses: it concerns the sincerity of the allocation.

An independent optician had for several financial years invoiced complete equipment under a global presentation, with a frame share systematically low compared with the prices charged on the same frames sold on their own. During a review of collected VAT, the allocation was challenged. The frame base was reconstructed to a level consistent with the optician's own unit prices, and a VAT adjustment was applied to the gap between the share declared at 5.5% and the share that should have been at 20%. A well-prepared file would have made it easier to respond to the reassessment notice.

The lesson is simple: it is not the dual taxation that is the problem, it is an apportionment that is undocumented and inconsistent with real prices.

100% Santé and third-party payment#

The 100% Santé reform, in place since 2021, requires the optician to offer a no-out-of-pocket option on a basket of class A equipment, fully covered. The payment method, including third-party payment, does not change the VAT regime. The bookkeeping of this circuit is detailed in our article on the optician's accounting and third-party payment.

The split between lenses at 5.5% and frame at 20% remains required on each piece of equipment, even within 100% Santé. The fact that there is no remaining cost for the customer does not remove the obligation to apportion the base.

Corrective sunglasses#

A pair of sunglasses fitted with corrective lenses on prescription follows the same mixed logic as eyewear: the lens share falls under the reduced rate, the frame under the standard rate. Conversely, sunglasses without correction remain entirely at 20%, because they contain no corrective medical device.

Distance selling#

Distance selling does not change the nature of the products: corrective lenses stay at 5.5%, the frame at 20%. The obligation to apportion applies in the same way whether the sale takes place in store or online, and the documentation of the allocation must accompany the invoice. A store that also carries out out-of-scope or exempt operations should, in addition, watch its deduction coefficient as a partial taxable person.

From 1 September 2026, the VAT part of the general tax code is recodified within the code of taxes on goods and services. This is a renumbering, with no change of substance: the 5.5% rate on corrective lenses and the 20% rate on frames remain unchanged.

In concrete terms, your apportionment obligations do not move. Simply make sure, in your invoice templates and internal notes, not to hard-code article references that may change with the recodification.

To secure your outlet's VAT durably, the operational priority is to configure your point-of-sale software correctly upstream, rather than correcting item by item at return time.

• Set up two distinct product families: medical correction (5.5%) and goods at 20%.
• Define a reference frame price consistent with your unit prices.
• Check that packages and 100% Santé offers correctly trigger the dual apportionment.
• Keep a record of the allocation behind each equipment sale.

• Corrective lenses and corrective contact lenses: reduced 5.5% rate as medical devices.
• Frames, sunglasses without correction and accessories: standard 20% rate.
• On an equipment or a package, the base must be split between the two rates, without undervaluing the frame.
• The value retained for the frame must reflect its real market price and your own unit prices.
• 100% Santé and third-party payment do not remove the apportionment obligation.
• The VAT recodification of 1 September 2026 changes the numbering, not the rates.