Custom Domains for Accounting Firms: Your Brand, Your URL
- Published
- Reading time
- 7 min
- Written by
- SpidNums
A custom domain puts the software a firm's clients log into on the firm's own web address, under the firm's name, logo and colours. In SpidNums, a firm can launch instantly on a branded subdomain such as yourfirm.spidnums.app, then connect its own domain when ready — so clients see one brand throughout: the firm's.
What clients actually see when they log in
Every portal login is a small brand moment. If clients leave your website for a third-party address carrying someone else's logo, the software vendor collects the trust you earned. A custom domain keeps the address, the branding and the credit under the firm's own name.
Why the login URL matters more than the logo
A logo can be swapped in; the address bar is what clients actually check. An address on the firm's own domain reads as the firm's infrastructure. It also survives bookmarks, screenshots and forwarded links — every one of which otherwise advertises a vendor instead of the practice.
How custom domains work in SpidNums
SpidNums gives every firm two options: an instant branded subdomain in the form yourfirm.spidnums.app, live from day one, or the firm's own domain connected when the firm is ready. Firms typically launch on the subdomain and move to their own domain once the portal is in daily use.
Branding beyond the address
The domain is one layer of a larger white-label surface. Firms set their name, logo, colours, tagline and letterhead, and the platform applies them across the admin workspace, the client portal and outgoing email. Clients see one consistent brand from the first invite to the signed engagement letter.
Email that matches the brand
Outgoing email carries the firm's display name and a branded HTML template, sent through the firm's own Gmail SMTP account or Resend. A delivery log records what went out, and a test send lets the firm check rendering before anything reaches a client.
Rolling the domain out to clients
Change the address once, early, and route everything through it: portal invites, engagement letter emails, deadline digests. A clean cutover with one announcement beats a slow migration in which half the firm's links point at the old address for a year.
From custom domain to full white-label
A custom domain is the visible edge of a genuinely multi-tenant platform: per-firm branding, per-tenant data isolation and plan management underneath. Firms wanting to go further — reselling to other firms under their own brand — run that model on the same foundation. Talk to us about white-label.
Frequently asked questions
Do we need to own a domain before starting with SpidNums?
No. Every firm gets an instant branded subdomain in the form yourfirm.spidnums.app, live as soon as the workspace is set up. The firm's own domain can be connected later without rebuilding anything — branding, client logins and content carry over. Many firms launch on the subdomain and connect their own domain once the portal is in daily use.
Does the client portal use the custom domain too?
Yes. The client portal runs under the same branded address as the rest of the firm's workspace, so clients sign in at the firm's domain and see the firm's name, logo and colours throughout. Engagement letters are the one deliberate exception: clients sign those on a no-login page linked from a branded email, to keep signing frictionless.
What branding can we change besides the domain?
Firm name, logo, colours, tagline, letterhead, and the display name on outgoing email. The branding applies across the admin workspace, the client portal and the email templates, so the platform reads as the firm's own system rather than a third-party tool with a logo dropped in.
Can we resell SpidNums under our own brand?
That is the white-label model the platform is built for: per-firm branding, custom domains, per-tenant data isolation and tenant management under one roof. Firms interested in running a reseller practice — offering the platform to other firms under their own name — should talk to us about white-label directly, since reseller arrangements are set up per firm.
Keep reading
Scenarios
Go deeper
Start running a tidier, deadline-proof practice.
Set up your firm in minutes. No credit card to start.