28 October 2026

Year-end inventory: how to prepare and secure it in a manufacturing SME

A year-end inventory comes down to three steps: prepare, count, validate. Here is how to make each step reliable in a manufacturing SME, avoid discrepancies between the count and the validation, and update your numbering sequences before the new year.

Inventory management · Manufacturing SMEs

Updated November 2026

From count to validation: securing your year-end closing

Logistics manager and colleague with a tablet preparing the year-end inventory in a warehouse

Every year end, the stock recorded in your ERP has to be checked against the stock actually sitting on your shelves.

For a manufacturing SME, the year-end inventory is both an accounting requirement and a demanding logistics operation: raw materials, work in progress, finished goods, sometimes several warehouses. Its reliability determines how stock is valued in the annual accounts.

The difficulty rarely lies in the count itself. It tends to arise beforehand, when the stock configuration no longer reflects the shop floor, and afterwards, when the validation takes place several days after the count. This guide goes through each step, including one that is often left to the last minute: updating numbering sequences at the turn of the year. The legal references cited apply to companies operating in France.

12 months maximum between two inventory checks of assets and liabilities, including stock, under French lawSource: French Commercial Code, art. L123-12

1 unique number per invoice, assigned in a chronological and continuous sequence, under French tax rulesSource: BOFiP, BOI-TVA-DECLA-30-20-20-10

10 years retention of accounting records and supporting documents in France, to plan for when archiving the inventorySource: French Commercial Code, art. L123-22

In a nutshell: a year-end inventory means physically counting stock to check that it matches the stock on record, and its reliability depends mainly on three moments, the preparation before the count, the handling of stock movements between the count and the validation, and the archiving once the inventory is validated.

1.Why the year-end inventory needs preparing 2.Before the count: make sure the ERP reflects the shop floor 3.Organizing the physical count 4.Between count and validation: the critical point 5.Validate, analyze discrepancies and archive 6.Don't forget your numbering sequences 7.What a manufacturing ERP brings to the inventory 8.FAQ: year-end inventory

1. Why the year-end inventory needs preparing

An inventory is the operation used to check the existence and value of stock at a given date, usually the end of the financial year. In France, the Commercial Code requires businesses with commercial status, which includes companies such as SAS, SARL and SA, to carry out this inventory check at least once every twelve months (article L123-12).

What is at stake during the inventory

Reliable annual accounts

Stock is shown on the balance sheet and affects the profit for the year. Any uncorrected gap between theoretical and actual stock goes straight into the accounts.

Accurate production data

In manufacturing, stock feeds requirements planning, purchasing and scheduling. Inaccurate stock on January 1 skews manufacturing orders and purchase orders for the weeks that follow.

Team involvement

The count ties up staff and sometimes operations. Careful preparation shortens it and limits recounts.

2. Before the count: make sure the ERP reflects the shop floor

Over the year, the physical layout of the stock changes: new aisles, reassigned locations, an additional warehouse. If the ERP has not kept up with these changes, count lists no longer match what teams find on the floor. A few checks, a few weeks before the chosen date, prevent most difficulties.

Preparation checklist

Stock configuration: warehouses, aisles and locations recorded in the ERP match the actual layout.

Inventory procedure: it is written down, up to date, and covers both the count and the validation.

Training: the people in charge of counting and validating know the screens and steps, including new staff.

Pending entries: receipts, deliveries and production reports in progress are recorded before the count.

Schedule: count and validation dates are set and shared with the accounting team.

3. Organizing the physical count

A physical count means recording, item by item and location by location, the quantities actually present. How it is organized depends on the size of the stock and the number of sites, but a few principles apply to most manufacturing SMEs.

Principles of a reliable count

Split the stock into zones

Assigning each zone or aisle to one team avoids duplicates and omissions. A count plan based on stock locations makes this split easier.

Control movements during the count

Ideally, receipts and issues are suspended in the zones being counted. When operations cannot stop, every movement must be tracked and assigned to the right period, before or after the count.

Limit re-keying

Entering counts directly on a handheld terminal, by scanning barcodes, avoids copying count sheets and reduces transcription errors.

Plan targeted recounts

Rather than counting everything twice, many companies only recount high-value items or those showing a significant discrepancy.

4. Between count and validation: the critical point

In many companies, the count takes place in the last days of December and the inventory is validated in early January. This is one of the most sensitive points of the inventory: between the two dates, operations have resumed and stock movements have been recorded.

If these movements are not handled correctly, the validation compares the count with a theoretical stock that has already changed, and shows discrepancies that do not exist.

Risky situations

Validating in January without taking into account the movements recorded since the count

Correcting a discrepancy manually without identifying its cause

Having the validation done by someone who did not follow the count

Leaving partial counts pending for several weeks

Good practices

Date the inventory on the day of the count, not the day of the validation

Check how the ERP handles movements recorded after the count

Keep the time between count and validation as short as possible

Document each discrepancy correction with its cause

Practical tip: run a trial on a small zone a few weeks before year end. This lets you check, with nothing at stake, that the procedure and the ERP settings produce the expected result.

5. Validate, analyze discrepancies and archive

Validation updates the ERP stock with the counted quantities. Before running it, analyzing discrepancies helps distinguish genuine losses or stock errors from data entry anomalies.

The three stages that close the inventory

Analyze discrepancies

Sorting discrepancies by value rather than quantity highlights those that really weigh on the accounts. A significant discrepancy calls for a recount before any correction.

Validate the inventory

Validation replaces theoretical quantities with counted quantities, as of the inventory date. This is the position used to value stock in the annual accounts.

6. Don't forget your numbering sequences

A numbering sequence is the ERP setting that automatically assigns a number to each new document: customer invoice, manufacturing order, purchase order, delivery note. When this number includes the year, the sequence must be updated at the start of the new financial year.

For example, without this update, an invoice issued in January could carry the prefix FC26 instead of FC27. Depending on the settings, some sequences can be prepared in advance, starting with customer invoices.

The French tax framework for invoices: each invoice carries a unique number, assigned in a chronological and continuous sequence. Two invoices issued in the same year cannot carry the same number, and separate series are allowed when the business justifies them, preferably with a specific prefix for each series (BOFiP, BOI-TVA-DECLA-30-20-20-10).

Numbering that includes the year is a common way to guarantee unique numbers. If in doubt about your numbering scheme, check it with your accountant.

Outside France: inventory frequency, invoice numbering and document retention periods are set by each country's rules. The principles described in this guide remain valid, but check the applicable requirements with your local accountant.

7. What a manufacturing ERP brings to the inventory

An ERP does not count on behalf of your teams, but it determines the reliability of everything around the count. Inventory management in Synoptic ERP supports several types of inventory: rolling, permanent, accounting (which stores the stock position at a closing date) and retroactive (which recalculates the stock position at a past date). Counts can be entered on a handheld terminal by scanning barcodes, and the WMS module allows a detailed inventory down to pallet level.

Already a Synoptic ERP customer? Your usual contact and our support team can help you prepare your inventory and update your numbering sequences.

FAQ: year-end inventory

Is a physical inventory mandatory every year?

In France, the Commercial Code requires businesses with commercial status to check, by inventory, the existence and value of their assets and liabilities, including stock, at least once every twelve months (article L123-12). How this is done, a full count at closing or rolling counts as part of a permanent inventory, is agreed with your accountant or statutory auditor. Outside France, the applicable rules depend on each country.

Can the inventory be taken on a date other than December 31?

Yes. The inventory relates to the end of the financial year, which is not necessarily December 31. A count carried out a few days before or after the closing date is still possible, provided the stock is reconstructed as of the closing date, taking into account the movements that occurred between the two dates.

Should stock movements be blocked during the count?

It is the safest option for the zones being counted. When operations cannot stop, every movement must be tracked and assigned to the right period, before or after the count, so as not to distort discrepancies.

What if the inventory is validated several days after the count?

Make sure the inventory is dated on the day of the count and that movements recorded since then are handled separately. Otherwise, the validation compares the count with a theoretical stock that has already changed and shows false discrepancies. The simplest approach is to keep the time between count and validation as short as possible.

Does invoice numbering have to restart at zero every year?

In France, tax rules require a unique number, assigned in a chronological and continuous sequence, and prohibit two invoices issued in the same year from carrying the same number (BOFiP, BOI-TVA-DECLA-30-20-20-10). Numbering that includes the year, for example FC27, is a common way to comply with this rule. Your accountant can validate the scheme you choose.

What is a rolling inventory?

A rolling inventory, also called cycle counting, means counting part of the stock at regular intervals throughout the year rather than all of it at once. Combined with a permanent inventory, it can reduce or replace the full year-end count, subject to the agreement of your accountant or statutory auditor.

Sources

French Commercial Code, article L123-12, Légifrance (in French). Requirement to carry out an inventory check at least once every twelve months.

French Commercial Code, articles L123-12 to L123-28-2, including article L123-22, Légifrance (in French). Ten-year retention of accounting records and supporting documents.

BOFiP, BOI-TVA-DECLA-30-20-20-10, French Directorate General of Public Finances (in French). Mandatory invoice details, including numbering.

Conclusion: a year-end closing that is prepared upstream

A reliable year-end inventory depends less on the day of the count than on everything around it: an up-to-date stock configuration, trained teams, controlled movements between count and validation, and archiving planned from the start. Updating numbering sequences completes this preparation, so the new year starts without corrections.

As publisher and integrator of Synoptic ERP, Proges Plus supports manufacturing SMEs in setting up their stock, training their teams and preparing their year-end closings, from its offices in Lille, Lyon and Nantes.

40+

years of ERP expertise

250+

manufacturing companies equipped

ISO 27001

certified information security

QUALIOPI

certified training provider

Talk to an expert Discover inventory management