ERP software for small business: do you need one, and how to pick

Short answer: you need an ERP when the same data is typed into several places, stock and accounts disagree, and reports take days to assemble. For a small business that usually means accounting, billing and inventory joined on one database first, with purchasing and HR added later. Choose the smallest system that fixes your biggest pain, and make sure you can export your data.

What are the signs you have outgrown spreadsheets?

• Stock counts never match what the books say.
• Month-end takes a week of reconciling files.
• Only one person knows how the sheet works.
• You cannot say what a given order really cost.
• Several people overwrite each other's files.
• Customer or supplier balances are argued about.

Which modules do small businesses use first?

• Accounting: a ledger with receivables, payables, tax, bank reconciliation.
• Sales and billing: quotes, orders, invoices, credit notes.
• Inventory and purchasing: stock by location, purchase orders, receipts.
• Later: manufacturing, projects, HR and payroll, CRM, e-commerce integration.

Cloud or self-hosted?

• Cloud ERP: quick start, vendor handles updates and security, monthly per-user cost, data under vendor control. Customisation is limited by what they allow.
• Self-hosted ERP: you control the data and the cost curve. You handle backup, updates and security. Good if you have IT help or a partner, or if data must stay on your premises.

The comparison is the same as in self-hosted vs SaaS costs. Work out the three-year total for both.

What costs surprise people?

• Implementation and data migration.
• Customisation, which must be redone or retested after upgrades.
• Per-user fees as the team grows.
• Integration with your bank, payment gateway, e-commerce site and tax portal.
• Staff time during rollout.
• Paid support tiers.

How do you select one?

• Write down your top five problems and what a fix looks like.
• Shortlist three products and demand a demo using your own data.
• Run a real month-end in the trial: post transactions, close, produce statements.
• Check the local compliance: tax invoices, e-invoicing, e-way bills, regional reports. For India start with the GST billing software guide.
• Read the contract for term, data export and price changes.

How do you roll out safely?

• Phase it: accounting and billing first, inventory second.
• Load opening balances carefully and have your accountant verify.
• Run old and new systems in parallel for a month.
• Restrict permissions from day one.
• Set up backups on day one and test a restore. See the restore drill.

An example of a system that joins billing, inventory, accounting and GST on a double-entry ledger is Rechvix. Whatever you pick, a small system that people use beats a large one they avoid.