Extracting data from property tax bills
Each county treasurer or tax collector issues property tax bills in its own design, once or twice a year. Mortgage servicers, underwriters and title companies read one for every escrowed or closing property. It arrives as a PDF from the county site or a scan of the mailed bill.
Servicing needs the parcel number, the assessed value, the full year amount and each installment with its due date. The escrow system schedules those payments, and the annual escrow analysis uses them to set the borrower's monthly deposit.
What makes property tax bills hard
Every county has its own bill
Each county treasurer designs its own statement, with lettered panels, value tables and a payment coupon arranged in its own order.
Levy rates to many decimals
Levy rates can print to ten decimal places, a precision the tax arithmetic depends on and that a rounded number would lose.
Two addresses on one bill
The property address sits in the statement and the owner's mailing address on the coupon, and for a rental the two are different places.
Parse, extract, verify
Parse
Parse turns the document into reading-order Markdown and a hierarchy of blocks (text, tables, figures), and grounds each block to its exact location on the page.
Extract
You define the fields in a JSON schema, and Extract returns their values in a consistent, structured format, each linked back to where it appears in the Markdown.
Verify
Each value links back to where it appears, down to the character range in the Markdown, and the page and bounding box in the source document, so every result can be verified.
One property tax bill, end to end
About this document: The Clark County, Washington, Treasurer's sample property tax statement, linked from the county's guide to reading a tax bill. One portrait page in lettered sections: header, property and value information, account summary, past-due details, the tax detail by district, and a payment coupon. Page 1 is featured. The owner and addresses are specimen data.
Processing objective: The objective is to follow how the bill is computed. The assessed value times the levy rate gives the district taxes, school district first. Flat assessments bring the total to the full year amount, which is payable in two halves.
Demonstration fields: Assessed value, Levy rate, School district tax, Full year due, First half due
The document
1 page
Page 1shown below
Where each value came from
value_information[1].assessed_value
{
"value": 756979,
"page": 1,
"range": {
"end": 1297,
"start": 1289
},
"box": {
"xmin": 0.14337,
"ymin": 0.56296,
"xmax": 0.24898,
"ymax": 0.57843
}
}value_information[1].levy_rate
{
"value": "6.4423487853",
"page": 1,
"range": {
"end": 1332,
"start": 1320
},
"box": {
"xmin": 0.34078,
"ymin": 0.56296,
"xmax": 0.47441,
"ymax": 0.57833
}
}district_taxes[0].tax_amount
{
"value": 345.47,
"page": 1,
"range": {
"end": 2031,
"start": 2024
},
"box": {
"xmin": 0.7704,
"ymin": 0.42064,
"xmax": 0.95215,
"ymax": 0.43503
}
}amounts_due.full_year_due
{
"value": 5157.93,
"page": 1,
"range": {
"end": 479,
"start": 470
},
"box": {
"xmin": 0.7082,
"ymin": 0.23541,
"xmax": 0.95119,
"ymax": 0.25036
}
}amounts_due.first_half_due
{
"value": 2579.01,
"page": 1,
"range": {
"end": 418,
"start": 409
},
"box": {
"xmin": 0.70805,
"ymin": 0.22063,
"xmax": 0.95112,
"ymax": 0.23544
}
}How to try it yourself
Everything on this page is reproducible. The sample, its schema, and the Parse and Extract API outputs are published. You can repeat the same two calls from whichever surface you already build on.
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Documents into data
Accurate
The best accuracy on the difficult documents other tools get wrong, such as messy scans, complicated tables, checkboxes and handwriting.
Auditable
Every answer cites its sources. Values come back with an audit trail (page, bounding box, character range) so a human can review them.
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