For most advisory firms the right answer is to buy the client portal that comes with your reporting platform, then build a thin custom layer only where it earns its keep: a branded front door, single sign-on, a document workflow or a view your platform can't show. Building a full portal from scratch means taking on data feeds, security and recordkeeping that vendors already handle, and it rarely pays off for a firm serving a few hundred households.
That is an unusual thing for a software studio to say, so here is the reasoning, the exceptions and what each path costs. It's written for RIAs, family offices and wealth managers in Greenwich and Fairfield County, where clients expect a polished digital experience and the compliance team expects to sign off on every piece of it.
What your reporting platform already includes
Most firms already pay for a performance-reporting platform, and the major ones ship a client portal and mobile app. Envestnet's Tamarac publishes regular release notes for its Client Portal and mobile app. SS&C's Black Diamond offers a client experience portal and app with optional firm branding. Orion markets a client portal with performance, goals and advisor messaging. Custodians also give clients their own logins for statements and account activity.
That overlap is why Matt Sonnen's WealthManagement.com column "Client Portal: Build or Buy?" (March 2020) argued firms should buy, noting that RIAs were spending "six figures (and more)" to build portals of their own. The vendors have kept investing since then, so the argument is stronger today. Before anyone writes code, get a demo of the current release of the platform you already license. Portals change every quarter, and the feature you think is missing may have shipped last spring.
Build vs buy vs extend: side-by-side
There are really three options, not two. The middle one, keeping the vendor portal as the engine and building a small custom layer around it, is where most firms that want something better end up.
| Buy (platform portal) | Extend (platform + custom layer) | Build (fully custom) | |
|---|---|---|---|
| Upfront cost | Included in or added to your platform license | Custom software from $10,000 at NixMar | Six figures and more, per the WealthManagement.com column |
| Data feeds | Vendor handles custodian data | Vendor handles; your layer reads it through APIs | You build or license every feed |
| Security and audits | Vendor's controls and reports | Vendor for the data, you for the layer | Entirely yours |
| Branding | Theme and logo options | Your design on the screens clients see most | Unlimited |
| Ongoing upkeep | Vendor | Small retainer or hourly work at $95–$140/hr | A standing engineering budget |
| Best for | Most RIAs | Firms with one specific, costly gap | Large firms whose portal is part of the product |
When a custom layer makes sense
These are typical gaps a custom layer can close. None requires replacing the platform, and each can be scoped as a small project.
A branded front door
One sign-in on your own domain that routes each client to reporting, custodian, planning software and document exchange through single sign-on, so clients stop juggling four passwords.
Onboarding and document collection
New-account paperwork and each spring's tax documents, with a checklist per household and status tracking your team can see.
Family-office views
Entities, trusts, real estate and private investments that don't fit the reporting platform's account model, shown next to the portfolio data.
Advisor-side dashboards
CRM activity and reporting data in one internal view. Often the highest-return build, because clients never see it and it doesn't change their experience.
A client app in your brand
Only when the platform's white-label app truly can't do the job. Mobile apps start at $8,000, but maintaining one is a long-term commitment.
Integration patterns that hold up
The engineering rule of thumb is to keep the vendor as the source of truth and make your layer as thin as the job allows.
Single sign-on first
Ask each vendor, in writing, which single sign-on standards they support (SAML 2.0 and OpenID Connect are the common ones) and whether they'll accept your identity provider. SSO is what makes a branded front door feel like one product rather than a page of links.
Read through APIs; don't copy the data
Pull what a screen needs from the platform's API when the screen loads, and cache as little as possible. Every copy of client data you keep is another system to secure, another thing to include in incident response and another record to reconcile when the platform restates a number.
Link out when embedding adds risk
Deep links into the vendor portal are less elegant than embedded widgets, but they keep the vendor responsible for what renders on those screens. Embed only what you're prepared to support and have compliance review.
Security and Regulation S-P
The SEC adopted amendments to Regulation S-P on May 16, 2024. Larger firms had to comply by December 3, 2025, and smaller entities, which for RIAs means less than $1.5 billion in assets under management, by June 3, 2026. The amendments require a written incident response program, notice to affected customers within 30 days when sensitive customer information is compromised, and policies requiring service providers to notify you within 72 hours of a breach that gives unauthorized access to a customer information system they maintain.
For a portal project, that means three things. Each vendor contract, including your developer's if they touch client data, needs the 72-hour notification and oversight terms. The custom layer needs logging good enough to tell you whose data was exposed. And multi-factor authentication shouldn't be optional. A thin layer that reads data through APIs and stores little of it is much easier to cover than a full custom portal.
Recordkeeping for portal messages and documents
Rule 204-2(a)(7) requires advisers to keep written communications they send and receive about recommendations or advice, the receipt or delivery of funds or securities, and the placing of orders. A secure portal message asking you to wire money to a new account falls squarely inside it. Rule 204-2(g) then sets conditions for electronic storage: records must be organized and retrievable, backed up separately and protected against alteration.
The simplest compliant design keeps client messaging in a channel your archiving system already captures. If a custom layer must include messaging, budget for the archive integration from the start. It's the piece most often forgotten in a portal quote.
What each path costs and how long it takes
At NixMar, custom software starts at $10,000, mobile apps at $8,000, and ongoing work runs $95–$140 an hour or through a monthly retainer starting at $4,000. A focused extend project, such as an SSO front door or a document-collection workflow, usually fits the entry tier, and our custom-software MVPs typically ship in 8–14 weeks. A fully custom portal costs several times more because you are rebuilding data aggregation, security review and recordkeeping that your platform already provides. Our B2B portal cost guide breaks down those cost drivers in more detail.
The public website is a separate project: advisor sites start at $2,500 on our pricing page, and the compliance requirements for them are covered in our SEC Marketing Rule website checklist.
Decision checklist
List what clients actually ask for
Pull a quarter of client emails and calls. The top five requests define the portal, not a competitor's feature list.
Demo the current release
Ask your reporting vendor and custodian to show their latest client portal against that list before you scope anything.
Try branding options first
If the gap is look and feel, the platform's theming or white-label app may close it for a fraction of the cost.
Get API and SSO access in writing
Confirm which endpoints, rate limits and sign-on standards you can rely on, and what they cost.
Map Reg S-P duties
Every new vendor needs incident notification terms and a place in your service-provider oversight.
Decide who archives messages
If the layer carries client communications, the archive integration is part of the scope.
Budget year two
Plan for upkeep from day one, whether that's a retainer or a block of hours for vendor API changes.
Frequently asked questions
Should an RIA build its own client portal?
Usually not. Most performance-reporting platforms advisers already license, such as Tamarac, Black Diamond and Orion, include a client portal and mobile app, and custodians give clients their own logins. Building from scratch means re-creating data feeds, security controls and recordkeeping. The better pattern for most firms is to keep the vendor portal and build a thin custom layer, such as a branded sign-in with single sign-on or a document workflow, only where there is a specific gap.
How much does a custom client portal cost for a financial advisor?
At NixMar, custom software starts at $10,000, and a focused project that extends an existing platform, such as a single sign-on front door or document collection, usually fits that entry tier. A fully custom portal that replaces the platform costs far more; a 2020 WealthManagement.com column noted RIAs spending six figures and more on in-house portals. Ongoing work runs $95–$140 per hour.
Does a client portal fall under Regulation S-P?
Yes, if it handles customer information. Regulation S-P's 2024 amendments require a written incident response program, customer notice within 30 days when sensitive customer information is compromised, and oversight of service providers, including notice to you within 72 hours of a breach of systems they maintain. Smaller RIAs, those under $1.5 billion in assets under management, had to comply by June 3, 2026.
Do secure portal messages need to be archived?
Messages about recommendations or advice, the receipt or delivery of funds or securities, or the placing of orders are written communications that Rule 204-2 requires advisers to keep. If your portal includes messaging, those messages need to reach your archiving system in an organized, retrievable and tamper-protected form. Keeping messaging in an already-archived channel is the simplest way to comply.
Buy the engine, build the front door
The portal that wins client loyalty is rarely the one with the most custom code. It's the one where signing in is easy, documents are where clients expect them and the numbers match the statement. Buying the engine and building only the front door gets you there faster and leaves your compliance team fewer systems to supervise.
If you run an advisory firm in Greenwich or Fairfield County and want a second opinion on a portal plan, tell us what your clients ask for most. We'll tell you honestly whether it's a configuration change, a small build or a bigger project.
