ATS Assessor Treasurer Software

ATS Assessor Treasurer Software is a freely available, open-source property tax application for calculating and collecting taxes. It manages assessments and levies for real and personal property, new construction and destroyed property, bankruptcies, foreclosures, and LIDs. Counties can configure payment plans and advance payment plans, set accounting options, and control late-fee and NSF-payment handling. The Personal Property Online module gives business owners a public website for updating personal property information. Users can run flexible queries, and the software has a general-purpose RESTful API that its interface also uses to access data. ATS works with Kitsap County’s MS SQL database without modifications; other Entity Framework-supported databases can be used with a modification change. The product is presented as developed by Kitsap County, Washington, and as still in development, with the county considering making it available as open source to other counties. Velosys offers counties deployment assistance, customization, training, and consultation. ATS is listed as free, but prices for those implementation and support services are not shown.

ATS covers property tax administration and exposes its data through a RESTful API. Counties should note its development status and clarify the scope and cost of any deployment or customization services.

ATS is presented for counties managing property assessments, tax calculations, and collections. It may suit counties seeking deployment or customization assistance from Velosys.

ATS Assessor Treasurer Software is a property-tax system developed by Kitsap County for county assessment and treasurer work. It is best suited to counties prepared to adapt an open-source application to their own operations. Its broad tax-administration scope is compelling at no software cost, but development and implementation needs deserve careful consideration.

Overview

ATS brings assessment, property records, and collections into one county-focused application. It covers real and personal property, levies, new construction, destroyed property, bankruptcies, foreclosures, and LIDs. That range makes it relevant to offices handling varied property and case types, rather than only routine assessments.

The system is described as open source and freely available, while Kitsap County is still developing it and considering broader availability to other counties. Those points make ATS an option to evaluate with county-specific deployment needs in mind, not an established turnkey choice. Velosys offers deployment assistance, customization, training, and consultation, but those services have separate costs to clarify.

Key features

• Assessment and property administration: ATS handles varied property records and events, including levies, foreclosures, and LIDs. This breadth can suit county offices whose work goes beyond standard assessment cycles.
• Payment plans and fee controls: Payment plans and advance payment plans support staged collections. Counties can choose whether to assign late fees and NSF payments, which helps align the software with local practices.
• Public personal-property updates: The Personal Property Online module gives business owners a public-facing way to update personal-property information. That can help counties collect those updates directly from the businesses concerned.
• Accounting configuration: Counties can configure accounting and interface ATS with existing accounting software. The practical fit will depend on how well local processes and systems align.
• RESTful API: ATS exposes a general-purpose RESTful API, and its user interface accesses data through that API. This API-centered design is useful for counties evaluating integrations, though the API alone does not establish which external systems are supported.
• Database compatibility: ATS works with Kitsap County’s MS SQL database without modifications. Other Entity Framework-supported databases can be used with a modification change, so counties using a different database should account for adaptation work.

Pricing

The ATS plan costs free and is open source. There are no paid software tiers described, so counties do not have to choose between feature levels or seat quotas. The trade-off is that free software does not mean a free implementation: Velosys offers customization, deployment, training, and consultation as services, and counties should clarify scope and cost before relying on them.

Platforms

ATS is presented as an API platform. Its RESTful API is central to how the interface accesses data, but the platform designation does not establish support for a particular mobile or desktop client.

Who it's for

ATS is most relevant to county assessment and treasurer offices seeking property-tax calculation and collection software, especially those able to assess an open-source system and plan for deployment or customization. It is a less suitable starting point for organizations seeking a mature, ready-to-deploy product or a software option aimed at corporate tax departments.

Pros and cons

Pros

• No software charge: The open-source ATS plan costs nothing, keeping software licensing out of the initial decision.
• Broad county tax scope: Assessment, property events, payment plans, fee controls, and accounting configuration cover important county workflows.
• API-led access: The RESTful API offers a clear integration surface for counties assessing how ATS could fit into their systems.

Cons

• Development status: Kitsap County is still developing ATS and considering broader availability, which makes it a less certain choice for counties seeking an established deployment.
• Adaptation may be needed: Non-Kitsap databases require a modification change, and customization or deployment assistance may add service costs.

Alternatives

For more options, browse Property Tax Software.

• CAMAai is a paid alternative with Android, iOS, and web platforms; its pilot program has limited county availability.
• Springbrook Property Tax Management is a paid Android, iOS, and web option covering residential, commercial, agricultural, and personal property taxes from assessment through billing and collection.
• CSC Corptax is a paid web-based enterprise corporate-tax product with demo-request pricing, making it a different fit from county property-tax administration.
• Ingenuity CAMA is a paid web alternative.
• PVDNet Suite is a paid option for API and web platforms.
• Catalis Assessment E-file is a paid web alternative.
• itamlink is a paid API and web alternative with Professional and Enterprise plans.
• Vision CAMA is a paid web and Windows alternative.

Verdict

County tax offices able to plan for implementation work should consider ATS for its wide assessment and collection scope, API access, and zero software cost. Counties that need a more established, ready-to-deploy system—or cannot budget for customization and deployment services—should look elsewhere.