A treasurer's guide to TMS integration

A treasury management system (TMS) gives a treasury team one place to see and manage a company's cash. Its value relies on the quality of data it receives and the actions it can trigger in other systems. Many treasury teams still transfer data using scheduled files and manual uploads. This often means the system lags behind the business it’s supposed to support.

What is a treasury management system?

A TMS is software that gives treasury teams a single view of cash and the tools to manage it. Most systems are built from modules, so a business can start with daily cash tracking and forecasting and add features such as payments or foreign exchange later. Some businesses use a dedicated system, while others use treasury modules within their enterprise resource planning software, some even build their own proprietary cash management architecture.

No matter which option a business chooses, the system is only as up to date as the connections that supply it. If a TMS gets bank balances once a day and ledger data once a week, its forecast will already be outdated.

What a TMS needs to connect to

Banks

Bank connections pull in up-to-date balances and statements. They also send payment instructions back and confirm when each payment has gone through. For most treasury teams, this is the foundation of the system because cash visibility depends on complete, timely bank data. Businesses with many banking partners often find that setting up bank connections is the biggest part of an implementation.

ERP and accounting systems

The Enterprise Resource Planning records what the business owes and what it’s owed. That information drives the cash forecast. In one direction, integration brings expected inflows and outflows into the TMS. In the other direction, treasury transactions like FX deals and investment income are posted back to the ledger for reconciliation.

Market data and trading platforms

Market data feeds keep exchange rates and interest rates current, so the team can value its positions and make hedging decisions on accurate numbers. Many teams also connect trading platforms, so deals confirmed outside the TMS are added to its records automatically, without re-entering the data.

Investment platforms

Forecasting shows the treasury team how much surplus cash they have and how long they can invest it. Usually, acting on this forecast means leaving the TMS and logging into a separate bank portal or fund platform. By connecting the TMS to an investment platform, this gap closes, and a forecast surplus can become an executed and recorded investment in one workflow.

How TMS integration works

File-based transfer

Many connections still use files exchanged on a set schedule, usually through a secure file transfer service or a direct link to the bank. Standard formats for bank statements and payment files make this method reliable and widely supported. The main drawback is timing, as new data only arrives with the next scheduled file.

Bank messaging networks

Larger businesses often connect to their banks using SWIFT, a messaging network used by financial institutions worldwide. EBICS is a similar standard used in parts of continental Europe. Both options give treasury teams a single channel to many banks, reducing the number of separate connections they need to manage.

Application programming interfaces

Application programming interfaces allow one system to request data from another or trigger an action when needed. With an API, a TMS can ask a bank for a live balance or send a payment instruction and get an answer back within seconds. API use is growing fast, but most businesses don’t replace all their file-based links at once. Usually, they start with one or two major banks or platforms and expand once they've tested the controls.

What an integrated treasury workflow looks like

The benefits of integration are clear in a typical day for the treasury team. Overnight, bank connections send closing balances and statements from every account. The TMS then matches them with expected flows from the ERP. By morning, the team has a full cash position without opening any bank portals or spreadsheets.

The forecast updates automatically as new invoices and payments are added to the ledger. If surplus cash remains beyond the operating buffer for the next month, the team can invest it with a set maturity. An approver signs off within the same workflow, and the confirmation goes back to the TMS and then to the general ledger.

When the investment matures, the principal and interest return to the chosen account and show up in the next day's position automatically. No one needs to re-enter figures between systems during this process.

Planning a TMS integration project

Map the current architecture

Begin by drawing a diagram of every system that holds or moves treasury data and how each one connects now. This often reveals where people copy figures between systems by hand or rely on spreadsheets to link them. These gaps highlight where integration can save the most time and cut operational risk.

Check what your licence covers

Some connections, including API access, are often sold as add-ons rather than included in the main system. Before planning, check which connections your current TMS contract includes (if you already have one) and which ones cost extra. Treasury consultants frequently warn that teams are surprised mid-project to find a needed module was never licensed.

Agree IT ownership early

Treasury teams usually can’t build and maintain integrations on their own, so a strong IT partnership is important from the start. Deciding who owns each connection and who responds if one fails helps prevent project delays.

Build in controls from the start

Every connection that can move money or change records needs the same controls as the systems it connects. Automated actions should go through the same approvals as manual ones, and every action should leave a clear record of who did what. Single sign-on, where staff use their usual company login, keeps access consistent across every connected platform.

Bringing cash investment into your TMS

Once a TMS can reliably forecast surplus cash, the next step is to act on that forecast without leaving the system. TreasurySpring's public API connects its cash investments to the systems a treasury team already uses. It covers the full investment process, from finding available products to subscribing and managing holdings until maturity.

Integrations are already live with treasury management systems like Kyriba, Atlar, and Hazeltree, with the same API connecting to in-house systems. Depending on that integration, teams can view holdings with their overall cash position or invest surplus cash directly from the TMS. Our partners page lists all the systems that work with the platform today. The flexibility of the API means we can easily add more, and our enterprise technology team is open to having those conversations with prospective clients.

The same controls apply to every connected system. On TreasurySpring, investments can require sign-off from two or three people through built-in approval workflows, and staff sign in with their usual company login. Teams that want more can also connect their portfolio data to AI assistants, as explained in our guide to the TreasurySpring Model Context Protocol server.

From reporting tool to decision-making tool

A treasury management system is most valuable when it is properly connected to the other systems the business relies on. Much of the work that keeps an integration on track happens early, in mapping the current setup and agreeing who owns each connection. Adding controls to every connection from the start protects the business as automation grows.

Adding cash investment turns the TMS from just a reporting tool into the place where treasury decisions are made. Contact TreasurySpring to see how its cash investments connect to your existing treasury system.

For anyone who can't tell the difference between their COP and their CCP, we've introduced our Treasury & Cash Investment Glossary.

*TreasurySpring’s blogs and commentaries are provided for general information purposes only, and do not constitute legal, investment or other advice.