Accounting Software Development for CPA and Advisory Firms That Move Clients to Signed Engagements

With DeveloperLook, setups for a firm start at $650 for a TaxDome portal on your domain. A practice software link starts at $900, a secure file portal at $1,350, and a firm site with onboarding at $2,000. A full accounting product with its own ledger is a larger build, which our SaaS Development Services page covers. Software vendors bill their own subscriptions.

Single setups take 1 to 6 weeks, depending on the tool. A TaxDome portal on your domain takes about 1 to 2 weeks, and a secure file portal takes 4 to 6. A site with onboarding takes 4 to 6 weeks, and adding the portal makes it 6 to 10. We plan switchovers outside your filing rush, so organizers and reminders are tested before clients see them.

The term means software fitted to one firm's workflow, by configuring a product you already pay for or building the pieces it lacks. Most firms keep QuickBooks Online or Xero and a practice platform such as Karbon, then add custom portals or links where those products stop. Rebuilding the ledger itself is rarely the right call.

Start with one job the software must do well, such as collecting client documents or turning accepted proposals into work. Map the data it touches (clients, entities, engagements, files, invoices), then decide what to buy and what to build. Connect QuickBooks Online, Xero, or your practice platform through their APIs or Zapier. Add MFA, encryption, and access logs, then pilot it with a few clients before launch.

Buy the ledger and the practice platform, then build only the gaps between them. QuickBooks Online, Xero, Karbon, Canopy, and TaxDome are mature products that would cost far more to rebuild than to connect. Custom work pays off where they stop: a portal on your own domain, a link from signed proposal to billing, or partner reports across offices.

This is a developer who builds or connects the software accountants use for ledgers, billing, and client files. The work covers data models for clients and entities, integrations with QuickBooks Online, Xero, or practice platforms, and security controls such as MFA and encryption. At DeveloperLook, the same team also designs the screens, tests them with your staff, and supports you after launch.

A CPA website is the public site of an accounting firm, built to win new clients and send existing ones to the portal. It usually has service pages for tax, bookkeeping, and advisory work, partner bios with credentials, online booking, and a secure upload path instead of email. Our CPA Website Design Services page covers the full build, from $1,100.

We connect TaxDome, Karbon, and Canopy, plus Ignition for proposals and QuickBooks Online or Xero for the books. Karbon's API sends webhooks, and Ignition links to Karbon natively on its Pro and Pro+ plans. Canopy's API needs approval and returns client data only. TaxDome connects to websites through its registration forms and Zapier.

We build to the controls in IRS Publication 4557 and the FTC Safeguards Rule. That means MFA for clients and staff, encryption in transit and at rest, and a log of who opened each file. Alerts go out without attachments, so tax files stay inside the portal. Section 7216 limits how preparers use and disclose return information, so we keep it out of review requests and marketing tools.

Your firm does: the code, the domain, your TaxDome or Karbon account, and your client records belong to you. Hosting and software accounts are opened in your firm's name, so changing developers later needs no transfer. You get admin access, documentation, and 30 days of support. After that, you can keep us on for changes or hand the runbook to your own IT support.