How Much Does IDX Cost Per Month?

The Short Answer

There is no single monthly price for IDX, and any quote given before someone asks which MLSs you are in is a guess. The monthly cost is assembled from four parts: fees the MLS charges for the data feed itself, the platform or vendor fee for displaying and searching that data, one-time setup and integration work spread across the term, and a multiplier for every additional market you operate in.

Current packaging on our side is on the pricing page. What follows is how to read any quote, including one that is not ours.

Component One: MLS Feed Fees

The data comes from the MLS, and most MLSs charge for issuing and maintaining a feed. This is billed to the participant by the MLS and sits outside whatever a technology vendor charges. It is the line item people most often leave out when comparing two proposals.

Two things to confirm with each MLS. What the fee covers, since some separate initial setup from ongoing maintenance. And whether it is charged per feed, per participant, or per authorized site, which matters if you plan to run more than one property under the same brokerage.

Component Two: The Vendor Platform Fee

This is what most people mean by "IDX cost." It covers the search interface, listing pages, saved searches and alerts, lead capture, and the ongoing work of keeping the integration aligned with each MLS as rules and Data Dictionary versions change.

Vendors meter this differently. Some price per site, some per agent or seat, some by traffic or listing volume, some by tier. The meter matters more than the headline number, because two products can reach the same total from opposite directions and diverge completely as you grow. Ask which meter you are on before comparing anything.

Also ask what changes when your MLS revises display or attribution rules. If that is billed as custom work every time, it belongs in your cost model.

Component Three: Setup and Integration

Setup is a real cost even when it is presented as free. It covers feed connection and credential provisioning, field mapping to the MLS Data Dictionary version, search and listing page implementation, lead routing into your CRM, and the compliance review many MLSs require before a display can go public.

The last one is a schedule cost as much as a money cost. Feed approval and display review are usually the longest part of the whole project, which is why the sequence in how to get IDX on your website starts with paperwork rather than code.

Where setup is waived, it is generally recovered through contract length. That is a legitimate structure, not a trick. Just price the whole term rather than the first month.

Component Four: The Per-Market Multiplier

This is where multi-market brokerages get surprised, and it is the component that scales worst.

Each additional MLS brings its own participation, its own IDX authorization, its own feed fee, its own certified Data Dictionary version and therefore its own field mapping, and its own display and attribution rules to keep current. It may also bring its own compliance review before launch.

Ask any vendor for a per-market breakdown rather than a blended figure. A brokerage operating across four MLSs should be able to see four sets of numbers. If a proposal presents one number for "IDX," it is hiding the component most likely to change when you expand.

Associations serving several boards or a regional membership face the same structure for a different reason. The considerations there are in our brokerage and association platform work.

The Cost Nobody Puts in the Quote

There is a fifth cost, and it never appears on an invoice: what the implementation does to your site's performance.

Embedded search interfaces, map tiles, and photo galleries bring their own scripts, styles, and fonts, and they compete for the same connection and main thread as the rest of your page. On real estate sites they are one of the most common causes of failing Core Web Vitals, which affects both search ranking and how many visitors stay long enough to convert. The mechanics, and how to attribute blocking time to a specific vendor, are in our pillar on Core Web Vitals for real estate.

A cheaper monthly fee attached to an implementation that costs you organic traffic is not the cheaper option. It is just the option where the cost is harder to see.

What to Bring to a Scoping Call

Have these five answers ready and a range turns into a number quickly: your MLS list by name, whether display runs under brokerage participation or an association arrangement, approximate listing volume and how many agent or office pages the site generates, whether leads route into an existing CRM, and whether you want a vendor-hosted interface or listing pages rendered as part of your own site.

Where to Go Next

For evaluation criteria rather than cost, see what to look for in a real estate IDX website. For how we build the integration itself, see IDX and MLS integration, and bring specifics through contact.

Frequently Asked Questions

Is the MLS feed fee included in what an IDX vendor charges?

Usually not. Most MLSs charge their own fee for issuing and maintaining a data feed, and that is billed to the participant by the MLS, separate from whatever a platform vendor charges to display the data. Always confirm which line items a quote includes before comparing two of them.

Why does IDX cost more for a multi-market brokerage?

Because most of the cost repeats per MLS. Each market means its own participation, its own IDX authorization, its own feed fee, its own Data Dictionary version and field mapping, and its own display rules to keep current. Two markets is rarely twice the work, but it is never the same as one.

What information do I need before anyone can quote me?

The list of MLSs you need feeds from, whether display runs under your brokerage participation or an association arrangement, roughly how many listings and how many agent or office pages the site has to generate, whether leads route into an existing CRM, and whether you want a vendor-hosted search interface or listing pages rendered as part of your own site. Without those, any number you are given is a placeholder.