You've just hired your first finance person. Congratulations—and brace yourself. Within two weeks, they'll tell you that your sales data lives in one place, your invoices in another, and reconciliation requires spreadsheet wizardry that shouldn't exist in 2024. At $500k–$2M revenue, you're big enough that manual data entry becomes a liability. Your new finance hire will be the canary in the coal mine: if CRM and accounting don't talk, they'll spend 30% of their time fixing what should be automatic. That's $15k–$20k annually in wasted labour on a single hire. The problem isn't that your tools are bad individually. It's that they're not talking to each other. Here are the five data flows that must work seamlessly, which ones break first, and which platforms actually handle them end-to-end. 1. Deals Close → Invoices Generate (No Manual Copy-Paste) Your sales team closes a deal in the CRM. The amount is $12,000. Terms: Net 30. Client name, email, tax ID, address—all logged in the contact record. What happens next matters. What breaks: Your sales rep emails finance with the deal details. Finance manually enters the customer into accounting software, re-keys the line items, and hopes the amount matches what was quoted. Three weeks later, the client gets an invoice for $12,500 because someone fat-fingered a zero. The deal was $12,000. Now you're managing a refund conversation instead of collecting cash. What must happen: When a deal is marked 'Won' in your CRM, an invoice is automatically created in your accounting system with the correct customer, amount, terms, and tax treatment. The client's tax ID (SST number in Malaysia, GST in Singapore, PPN in Indonesia) must flow from the contact record to the invoice without human hands touching it. Platforms that handle this: Orin's CRM integrates directly with Orin's invoicing , eliminating the handoff entirely. Zoho CRM + Zoho Books does this well. Pipedrive + QuickBooks requires Zapier or native integration, and the tax ID field often gets lost in translation. HubSpot + Xero works, but you'll need workflows to handle currency conversion in multi-region deals. 2. Payments Land → Pipeline Updates (Revenue is Real Only When Cash Arrives) An invoice goes out for $12,000 on the 1st. Your sales rep checks the pipeline on the 15th and marks the deal 'Closed Won'—but the payment hasn't landed yet. Your finance person now has two problems: a false revenue number in the forecast, and no visibility into which invoices are actually paid. What breaks: Bank feeds import into accounting software, but they don't update the CRM. Your sales forecast includes deals that are still outstanding. Finance sees that Invoice #4521 is 90 days overdue, but the sales team marked it Won three months ago and moved on. Cash flow reporting becomes fiction. What must happen: When a payment posts to your bank account (whether it's a Stripe transaction, direct transfer, or cheque), your accounting system automatically flags the matching invoice as paid. That status update flows back to the CRM, so your pipeline only includes deals with cash collected—or at minimum, a clear distinction between 'invoice sent' and 'paid'. Your finance person can then run a real cash flow forecast instead of guessing. Platforms that handle this: Orin's billing and CRM show invoice status in real-time, with bank reconciliation visible to both sales and finance. Xero's bank feeds are strong, but Pipedrive doesn't automatically pull payment status back into the pipeline—you'll need a manual weekly sync or Zapier to stay current. Zoho's ecosystem works here, but requires careful field mapping. 3. Contacts Update Once (Not Three Times) A prospect gives you their business registration number during a sales call. Your rep enters it in the CRM contact record as 'Tax ID'. Three months later, that same contact signs up for your service via your website form, and a second contact record is created with a different field name ('Reg Number'). When finance tries to invoice, they find two records, mismatched data, and no way to know which is current. What breaks: CRM and accounting systems both store customer data, but they don't sync bidirectionally. Tax IDs, addresses, email addresses, and phone numbers live in multiple places. When a client updates their address, it lives in the CRM but never reaches the invoicing system. Invoices go to an old address. Payments fail because the bank details are out of sync. Your finance person spends an hour a week manually checking and correcting. What must happen: Customer master data has a single source of truth. When a contact is created or updated in your CRM, key fields—name, email, tax ID, billing address, payment terms—sync to accounting software automatically and bidirectionally. When finance corrects a tax ID (because the client provided an updated registration number), that update flows back to the CRM so sales has current information too. Platforms that handle this: Orin syncs contact data