How Much Does It Cost to Build a Multi-Vendor Marketplace in Saudi Arabia in 2026?

An ordinary store has one seller and a buyer. A multi-vendor marketplace has three parties: the buyer, the vendor, and the platform owner who takes a commission. That third party is what multiplies the work: for every riyal that comes in, the system must know how much belongs to the vendor, the platform and the shipping company, when it is paid out, and what happens if the product is returned after the payout.

So a marketplace is not priced by product count or by how the front end looks. These decisions price it:

A first version that tests the idea: vendor sign-up with manual approval, a panel where vendors add products and follow orders, a catalogue with search and filters, basket and online payment, a single commission rate, manual settlement where the system produces the statement and the accountant makes the transfer, and an admin panel for vendors and orders. This usually costs SAR 25,000–100,000 and is enough to start with a few dozen vendors.

What can wait: mobile apps, paid advertising for vendors, a wallet, a loyalty programme and fully automatic settlement. What we do not recommend postponing: an accurate financial record for every order that separates the vendor’s share, the platform’s share, shipping and tax. Settlements, returns and reports are all built on that record later, and fixing it after thousands of orders is painful. With tiered commissions, unified shipping and returns, the project moves into the full marketplace range of SAR 100,000–200,000.

Money can move in two ways. In the first, the buyer pays the platform, which then pays the vendor their share after deducting commission. In the second, the payment gateway splits the amount automatically at payment or at settlement, so each party receives its share straight from the gateway. The second is simpler for the accounts and clearer for vendors, and it depends on the gateway you contract with supporting it.

Collecting buyers’ money, holding it and then paying it out to vendors may fall under regulated payment activities, which have licences and supervising authorities. The common solution is for payments and splitting to go through a licensed payment gateway that the platform contracts with in its own name. We do not give legal or financial advice. Check with the regulator or a specialist adviser before you settle on how money moves, because this decision changes the design of the system from the ground up.

On tax, who issues the invoice to the buyer: the vendor or the platform? The answer depends on your business model and affects the e-invoicing requirements of the Zakat, Tax and Customs Authority. Settle it with your accountant before the scope of work is written.

You pay on every order: payment gateway fees, verification messages and notifications to buyer and vendor, and shipping if the platform runs it. Market estimates put third-party services and APIs at SAR 2,000 a month and up for active platforms, and a shipping company integration from SAR 500 each.

Set aside 15% to 20% of the build cost each year for maintenance. The item people forget is the operations team. A marketplace needs someone to approve vendors, review products, answer disputes and chase late shipments. Those are salaries, not development, and they grow with every new vendor. The cost of attracting vendors and buyers together is usually larger than the cost of building the platform.

There are plugins that turn open-source stores such as WooCommerce into a multi-vendor marketplace, and ready-made marketplace scripts. They go live in weeks at low cost and are fine for testing demand with a handful of vendors. Their limits show as you grow: settlements that do not fit your model, weak integration with local payment gateways and carriers, performance that drops with thousands of products, and customisations that break on every update.

Custom development builds commission, settlement and shipping around your own model, and you own the code and the data. A working rule: if your goal is to find out whether vendors will sign up and customers will buy, start ready-made. If your model has something the ready-made options do not cover, such as wholesale between businesses, negotiated pricing or unified shipping, custom development is the realistic route.

The first is building the whole platform before ten vendors have agreed to join. A marketplace without vendors attracts no buyers, and without buyers the vendors leave. Test both sides before you spend on features. The second is a general marketplace for everything: the large platforms own that space, and the realistic opportunity is a category, a sector or a city you serve better than anyone else.

The third is leaving return and dispute rules until after the first problem. Write them before launch: who pays for shipping, when the commission is reversed, and how long a vendor has to respond. The fourth is neglecting catalogue quality: one product under five names from five vendors makes search useless. The fifth is forgetting that buyers’ and vendors’ details are personal data under the Personal Data Protection Law, so decide what a vendor sees of the buyer’s data.

Ask for a live test: one order with two products from two vendors, then return one of them and follow what shows on each vendor’s statement and in the platform’s account. At Fortune Code we commit to a written delivery date, with fast technical support after launch. The code and accounts are yours, and we send a written proposal within 24 hours.