ATS Assessor Treasurer Software

Spec sheet

Purpose

ATS is an open-source, customizable property tax solution for calculating and collecting property taxes.Read 5 Oct 2026 · velosys.com

Intended users

The page presents ATS as a property tax management application developed by Kitsap County, Washington, and describes Velosys deployment assistance for other counties.Read 5 Oct 2026 · velosys.com

API

ATS has a general-purpose RESTful API, and its UI accesses data through that API.Read 5 Oct 2026 · velosys.com

Headquarters

Poulsbo, Washington, United StatesRead 28 Sep 2026 · velosys.com

Founded

2011Read 28 Sep 2026 · velosys.com

Accounting

The software lets counties configure accounting and interface with their existing accounting software.Read 5 Oct 2026 · velosys.com

Assessments and property

It manages assessments, levies, real and personal property, new construction and destroyed property, bankruptcies, foreclosures, and LIDs.Read 5 Oct 2026 · velosys.com

Database

The page says ATS works with Kitsap County’s MS SQL database without modifications and that other Entity Framework-supported databases can be used with a modification change.Read 5 Oct 2026 · velosys.com

Development status

The page says ATS is in development by Kitsap County and that Kitsap is considering making the project open source and available to other counties.Read 5 Oct 2026 · velosys.com

Fees and payments

Users can control whether late fees and NSF payments are assigned.Read 5 Oct 2026 · velosys.com

Fees and queries

Users can control whether to assign late fees and NSF payments, and can run flexible queries.Read 5 Oct 2026 · velosys.com

Implementation and support

Velosys offers counties assistance with deployment, customization, training, and consultation.Read 5 Oct 2026 · velosys.com

Implementation support

Velosys offers counties deployment assistance, customization, training, and consultation.Read 5 Oct 2026 · velosys.com

Maker background

Velosys says it was founded in 2011 and is based in Poulsbo, Washington.Read 5 Oct 2026 · velosys.com

Maker headquarters

Velosys is based in Poulsbo, Washington.Read 5 Oct 2026 · velosys.com

Open source

The page describes ATS as open source and freely available.Read 5 Oct 2026 · velosys.com

Payment plans

It supports payment plans and advance payment plans.Read 5 Oct 2026 · velosys.com

Public module

Its Personal Property Online module provides a public-facing website where business owners can update their personal property information.Read 5 Oct 2026 · velosys.com

Queries

ATS supports flexible queries.Read 5 Oct 2026 · velosys.com

Plans and prices

Every ATS Assessor Treasurer Software plan and price →

Where Specifiction places it

• Property Tax Software#1 of 188.3