Inventory Planning & Reordering Excel Model – Excel XLSX

VIDEO DEMO

BENEFITS OF THIS DOWNLOADABLE EXCEL DOCUMENT

1. Effectively manage and plan inventory by tracking reorder details, projected balances, sales, and cash flow for stock items.

INVENTORY MANAGEMENT EXCEL DESCRIPTION

Editor Summary Inventory Planning & Reordering Excel Model is an XLSX financial model built by former Deloitte financial modeling professionals, accountants, and CFA charterholders, sold as a digital download on Flevy. Read more The model supports up to 25 SKUs and a 4-year monthly timeline (1 year of actuals plus 3 years forecast), and calculates reorder levels, reorder quantities and periods, inventory balances and valuation, projected purchases and sales, and monthly cash flow projections. Delivery includes editable spreadsheets, instructions, checks, and a checks dashboard.

Use this model when a business must set or revise reorder points, safety stock, and order quantities to avoid stockouts or excess inventory, or when finance needs monthly inventory-driven cash flow projections across a 1+3 year timeline.

  Inventory managers calculating reorder points, safety stock and reorder quantities using delivery lead time and months-per-order inputs.
  Finance managers forecasting projected purchases, sales, opening/closing inventory valuation, and monthly cash flow movements.
  Supply chain planners scheduling replenishment by SKU based on lead times, pending deliveries, and months covered per order.
  Small business owners assessing inventory for a stock group or brand using past 12 months sales and projected forecasts.

The model’s tabbed input-calculation-output structure, built-in checks, and audit review reflect good-practice financial modelling principles used in professional financial modelling.

An Inventory Planning & Reordering Excel Model is crucial for businesses managing stock. It optimizes inventory levels, preventing stockouts or excess holdings. This model aids in strategic planning, ensuring efficient cash flow allocation. It supports decision-making related to reorder points, safety stock levels, and order quantities. Accurate planning empowers businesses to adapt to demand fluctuations, reduce carrying costs, and enhance customer satisfaction. It streamlines supply chain operations, attracts cost savings, and supports sustained growth by aligning inventory strategies with business objectives. This model is indispensable for both established businesses and startups, ensuring effective inventory management and operational efficiency.

PURPOSE OF MODEL
User-friendly financial model for inventory planning for up to 25 stock keeping units (SKUs – can be extended if required) calculating:
•  Reordering level, quantity and period;
•  Inventory balances and valuation;
•  Projected purchases and sales
•  Projected cash flow movements

The model calculates the above across a 3-year period, referencing historic inventory movements and expectations for the forecast period. The model is an excellent resource for managing stock levels and optimising reorders for a particular stock group / brand. Outputs are presented in an intuitive dashboard format in both table and chart format.

The model follows good practice financial modelling principles and includes instructions, line item explanations, checks and input validations.

KEY OUTPUTS
The key outputs include:
•  Reorder amounts, dates and quantities;
•  Inventory quantity and value balance by SKU both in table and chart format;
•  Projected sales, cost of sales, inventory opening and closing balances and purchases both in table and chart format;
•  Expected receipts and payments and net movement in cash flow by month;
•  Breakdown of inventory balance, safety stock, sales quantities and stock deliveries by SKU;
•  Full breakdown of projected stock balance movements.

KEY INPUTS
•  Name of Inventory group or brand;
•  Currency;
•  Latest month end;
•  SKU naming, delivery lead time, months covered per order, safety stock levels;
•  Latest stock balance and pending deliveries by SKU at latest month end;
•  Cost price and selling price per unit and per SKU;
•  Past sales volumes across previous 12 months;
•  Payment terms for customer receipts and supplier payments;
•  Opening receivables and payables balances and expected settlement of these balances.

MODEL STRUCTURE
The model comprises of 5 tabs split into input ('i_'), calculation ('c_'), output ('o_') and system tabs. The tab to be populated by the user is the ‘i_Inputs' tab. The calculation tab uses the user-defined inputs to calculate and produce the projection outputs which are presented in 'o_Results'.

System tabs include:
•  A 'Front Sheet' containing a disclaimer, instructions and contents;
•  A checks dashboard containing a summary of checks by tab.

KEY FEATURES
Other key features of this model include the following:
•  The model follows good practice financial modelling guidelines and includes instructions, checks and input validations to help ensure input fields are populated accurately;
•  The model includes a 4 year timeline on a monthly basis, consisting of 1 year of actuals and 3 years of forecast.
•  The model includes the possibility to model up to 25 SKUs which can be extended if required.
•  The model is not password protected and can be modified as required following download;
•  The model is reviewed using specialised model audit software to help reduce risk of formula inconsistencies;
•  Stock group and SKU naming, currency, starting projection period are fully customisable;
•  The model includes instructions, line-item explanations, checks and input validations to help ensure input fields are populated accurately;
•  The model includes a checks dashboard which summarises all the checks included in the various tabs making it easier to identify any errors.

TOPIC FAQ

What inputs are typically required to build an inventory reorder model?

A practical inventory reorder model requires SKU identifiers, delivery lead time, months covered per order, safety stock levels, latest month-end stock and pending deliveries, unit cost and selling price, past sales volumes (typically previous 12 months), payment terms, and opening receivables/payables balances, enabling month-by-month projections based on those inputs.

How do inventory models determine reorder points and quantities?

Inventory models determine reorder points and quantities by combining user inputs such as delivery lead time, months covered per order, safety stock levels, and recent sales patterns; the Inventory Planning & Reordering Excel Model uses those inputs to calculate reorder levels, quantities and timing for each SKU.

What outputs should I expect from a robust inventory planning spreadsheet?

Expected outputs include reorder amounts, dates and quantities; SKU-level inventory quantity and value balances in tables and charts; projected sales, cost of sales, purchases, opening/closing inventory balances; and expected receipts/payments and net monthly cash flow movements.

What should I look for when choosing an off-the-shelf inventory planning Excel template?

Look for templates that handle your SKU count (this model handles up to 25 SKUs), provide monthly timelines with actuals plus forecasts, include input validations and a checks dashboard, allow customization (no password protection), and show cash flow impacts from inventory, such as net movement in cash flow by month.

How does buying a template compare to building an inventory model from scratch in terms of value?

Buying a template saves setup time by providing pre-built calculation logic, documented inputs, and built-in checks that reduce formula risk; value is realized through immediate usable outputs like reorder amounts, inventory valuation tables, and projected cash flows rather than building those from zero.

Can an Excel inventory model handle seasonality and a growing SKU list for a small retailer?

Yes—using past monthly sales (previous 12 months) and a monthly projection timeline (1 year actuals plus 3 years forecast) lets you reflect seasonality, and templates like the Inventory Planning & Reordering Excel Model support up to 25 SKUs and can be extended if required.

How can finance teams use an inventory model to improve working capital forecasting?

Finance teams can link projected purchases, expected supplier payment terms, customer receipt terms, and opening receivables/payables to monthly inventory movements to derive expected receipts and payments and net movement in cash flow by month, improving working capital visibility.

What Excel structure is commonly used in professional inventory models?

Professional models typically separate inputs, calculations, and outputs into distinct tabs (for example i_Inputs, c_ calculation, o_Results), include a front sheet with instructions and disclaimers, and contain a checks dashboard summarising validation checks across the workbook.

Source: Best Practices in Inventory Management Excel: Inventory Planning & Reordering Excel Model Excel (XLSX) Spreadsheet, Projectify