# Import from a spreadsheet

Bring your existing customers, sites, contacts and equipment into Sustainable ERP from a CSV or Excel file.

Import in this order: customers, then sites, then contacts, then assets. Each one needs the one before it to exist.

1. Open **Settings → Import centre** and select **New import**.
2. Choose **What are you importing?**
3. Select **Download template** if you want a file with the right columns.
4. Choose your file (.csv or .xlsx, up to 10 MB and 20,000 rows) and select **Upload and continue**.
5. **Match columns**: tell Sustainable ERP which of your columns is which. Pick **Don't import** for columns you don't need.
6. Select **Check rows**. You'll see how many rows are ready and any problems, row by row.
7. Select **Import** with the number of good rows, for example **Import 240 rows**.

Nothing is saved until the last step. Rows with problems are skipped; select **Download rows not imported**, fix them and import that file again.

For customers, tick **Skip customers that already exist (same name)** to avoid duplicates.