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How to Set Up a Finance Tech Stack from Scratch

The right finance tech stack for your business depends on your stage, your team, and your operational complexity. Here's how to think through the setup.

Tech stack rollout
  1. 1Start with the accounting system. QuickBooks Online or Xero for most. Everything else integrates here.
  2. 2Add bill pay and AP automation. Bill.com, Ramp Bill Pay, or QBO's built-in AP. Saves the most time per dollar of expense.
  3. 3Add a corporate card with expense management. Ramp, Brex, or similar. Categorization automation is the real value.
  4. 4Add payroll. Gusto for simple, Rippling for multi-country or tech-heavy.
  5. 5Add a billing / revenue system if you have recurring revenue. Stripe Billing, Maxio, Ordway. Revenue recognition is the hard part.
  6. 6Add reporting and FP&A tools at scale. Mosaic, Cube, Pry, or similar, once you're past $5M in revenue.
  7. 7Document the integrations. What flows to what, who owns each handoff, what gets reconciled monthly.
  8. 8Resist over-tooling. Every tool is also overhead. Add only when the manual version actually breaks.

The core layer: accounting software

Everything starts with your accounting platform, QuickBooks Online or Xero for most businesses under $20M in revenue. This is where the books live, where the P&L and balance sheet are produced, and where all other tools should integrate. Choose one and set it up properly before adding anything on top of it.

Accounting software is the foundation. Everything else integrates to it. For companies under $30M revenue, this is typically QuickBooks Online or Xero. Both handle multi-entity, multi-currency, and multi-user needs at that scale. Past $30M, consider NetSuite or Sage Intacct, more capability, more complexity, more cost.

The choice matters less than you think early on. Good accountants can produce good books on either QBO or Xero. The more important decisions are configuration, integration setup, and process discipline. A well-run QBO instance produces better output than a poorly-run NetSuite instance costing 10x more.

The payroll layer

Payroll needs to connect cleanly to your accounting system. Gusto is the most widely used option for small to mid-sized businesses in the US, it handles compliance, integrates with QuickBooks and Xero, and is generally intuitive. Rippling is stronger if you have significant HR complexity or a mix of domestic and international employees. ADP is an option for larger operations that need more customisation.

Payroll goes next because it runs regardless of business stage. Gusto and Rippling are the default choices for most growing companies. Both handle multi-state, offer benefits administration, and integrate with QBO and Xero. Rippling adds device management and broader HR capability at higher cost. Gusto stays focused on payroll and benefits at lower cost.

The integration to accounting matters more than most other features. A well-integrated payroll system pushes journal entries automatically to your accounting software every payroll cycle. An unintegrated system requires manual entries each cycle, 30-60 minutes of work that should not exist. Make integration quality a top-3 criterion in your payroll selection.

The expense and AP layer

For businesses spending more than $50-100K per month, dedicated AP and expense tools start to pay for themselves. Ramp and Brex both offer corporate cards with expense management built in, receipt capture, and accounting integrations. Bill.com is the standard for AP workflow, approval routing, payment processing, and two-way sync with your accounting platform.

Bill pay and expense management sit on top of accounting. Bill.com is the default for AP automation, receives bills, routes for approval, executes payment, posts to accounting. Ramp and Brex are the defaults for corporate cards with built-in expense management. Both eliminate receipt chasing and manual expense reports for employee spending.

One warning: these tools are effective but generate their own accounting entries that need review. A Ramp transaction categorized as "Office Supplies" might belong in "Software Expenses" based on what was actually bought. Category mapping needs to be configured and reviewed, not trusted blindly. A category drift here shows up in a P&L that does not reflect actual spending patterns.

What to add and when

Add tools when the friction of not having them costs more than the tool itself, not before. A business with three employees doesn't need Ramp. A business with 30 employees paying 50 vendors per month probably does. The mistake is adding complexity before you've validated that the underlying process is working correctly. A clean, simple stack is almost always better than a complex one.

Add layers as the business needs them, not preemptively. Revenue recognition software (Maxio, Chargebee) when contracts get complex. Budgeting and FP&A tools (Mosaic, Cube, Jirav) when spreadsheets become unmaintainable. BI tools (Looker, Tableau) when reporting needs outgrow what accounting can produce. Financial consolidation tools when you have multiple entities reporting to one parent.

The order matters. Do not add FP&A tools before the books are clean. Do not add BI before you know what metrics you need to track. Adding tools in the wrong order creates gaps where data flows poorly and decisions get made on unreliable numbers. The accounting foundation has to be solid before the layers on top can be useful.

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