For many founders, expense tracking is an afterthought. But as you scale, "shadow spend" and lost receipts can bleed thousands from your bottom line.

DO: Digitalize Immediately

Use an app to snap a photo of every receipt immediately. OCR technology can extract the data, so you don't have to type it in.

DON'T: Mix Personal and Business

This is the cardinal sin of accounting. It pierces the corporate veil and makes tax audits a nightmare. Always use a dedicated business card.