Blog · September 25, 2026 · South Carolina
What Is a TMS Number in South Carolina?
If you own land or are buying a house anywhere from Greenville to Beaufort, sooner or later a clerk, lender or title company will ask for the TMS number. It is the county’s tax map identifier for the parcel, and once you understand how the digits are built, you can use it to pull up the lot on any South Carolina county parcel map.
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What TMS stands for (it depends on the county)
Here is a small quirk that confuses newcomers: the three letters do not expand the same way everywhere. Lexington County’s assessor defines TMS as “Tax Map System.” Charleston County’s Register of Deeds glossary calls it a “Tax Map Sequence Number” and treats it as the same thing as a PID, or parcel identification number. Greenville County’s GIS office uses “Tax Map Survey Number” on its FAQ sheet and calls the same value a PIN.
The label changes, but the job is identical. The number ties one piece of land on the county’s tax map to the owner, assessed value and tax bill in the assessor’s records. If a form asks for a TMS, PIN, PID or tax map number in South Carolina, it almost always wants that same county-assigned value.
How the digits are built
South Carolina regulation 117-1740.2 requires every county to use a standardized parcel numbering scheme. For counties that still keep manual maps, the rule sets a floor of ten digits, split into four parts:
- Map, three digits, pointing to a sheet in the county’s tax map series.
- Sub-map, two digits, a smaller piece of that sheet.
- Block, two digits.
- Parcel, three digits, the individual lot.
The same regulation lets counties with digital maps tied to the South Carolina State Plane Coordinate System use a coordinate-based identifier instead, so the number describes a location on a grid rather than a page in a map book. It also bars counties from folding school districts or city limits into the number. Condominium units share the land parcel’s number and add a decimal suffix from .001 to .999, so two units in one building differ only in those last three digits.
Counties then add their own twists. Greenville’s PIN is 13 characters: a six-character sheet, a two-digit block and a five-digit lot. The county shows it three ways. For example, 0533040101314 is the plain 13-digit form, 0533.04-01-013.14 is the dashed form printed on assessment notices and many deeds, and 533.4-1-13.14 is a shortened version with the padding zeros dropped. Some Greenville sheets begin with letters, so a PIN can start with M, T or WG instead of a zero.
Where to find your TMS number
You probably already have it on paper. Look at:
- Your county property tax bill or the assessment notice mailed during a reassessment year.
- The first page of your deed, where the preparer usually types the TMS near the grantor and grantee names.
- Closing documents and title insurance papers from your purchase.
If none of that is handy, open the county parcel viewer and search by owner name or street address. Every South Carolina county we list shows the parcel’s ID in the pop-up or property card once you click the lot. Start from the South Carolina county list or the national map, pick the county, and follow the outbound link. A few counties run their maps on qPublic, while others use their own ArcGIS sites, so the search box may say PIN, TMS or Parcel ID depending on where you land.
Typing it into a search box
Most failed searches come down to formatting. A few habits help:
- Try the number with and without dashes and periods. Greenville’s online search, for instance, expects the full 13 digits with no punctuation.
- Keep leading zeros. Dropping the first zero turns a valid number into a different or nonexistent parcel.
- For a condo, include the unit suffix, or you will land on the common land parcel instead of your unit.
- If an old deed’s number returns nothing, the parcel may have been split, combined or renumbered since. Search by address or owner, then compare the legal description.
What the TMS number does not tell you
A tax map number locates a parcel for tax purposes. It does not define the boundary. The lines on a South Carolina tax map are drawn from deeds and plats so the assessor can bill the right owner, and they can be off by several feet or more from the true corners. When a fence, driveway or building setback is at stake, the recorded plat and a survey by a South Carolina licensed surveyor are what count. Our guide to assessor maps versus surveys walks through where a tax map is good enough and where it is not.
Why the assessor cares so much about this number
South Carolina taxes real property on a share of its value rather than the full amount. Lexington County explains that most real property is assessed at either a 4 percent or a 6 percent ratio. The lower ratio is the familiar owner-occupied legal residence rate, and a second home or rental generally falls under the higher one. That assessed figure is then multiplied by the local millage. Because the ratio, exemptions and millage are all stored against the TMS, getting the number right matters when you file for the legal residence rate after a move or appeal a value after reassessment.
Tips for buyers, builders and land shoppers
Before you make an offer on a lot or acreage, write down the TMS from the listing and look it up yourself. Check that the owner name matches the seller, that the acreage on the card is close to what is advertised, and that the parcel outline on the map matches the land you walked. Builders comparing lots in a new subdivision should watch for recently created numbers, since the county may still show the parent tract until the new plat is processed. Hunters and timber buyers looking at rural tracts can use the map’s neighbor parcels to see who owns the surrounding woods, which our article on finding adjacent owners covers in more detail.
South Carolina county guides
We have written step-by-step guides for several South Carolina counties, including Greenville, Charleston, Lexington, Horry, Spartanburg and Oconee. Each one names the local viewer and explains how that county formats its parcel IDs.
Frequently asked questions
Is a TMS number the same as a parcel number?
In South Carolina, yes for practical purposes. Counties call it TMS, PIN, PID or tax map number, but each refers to the assessor’s identifier for one parcel.
How many digits is a South Carolina TMS number?
State rules set a minimum of ten digits for counties with manual maps: map, sub-map, block and parcel. Some counties use longer formats, such as Greenville’s 13-character PIN.
Can my TMS number change?
Yes. Splits, combinations and map revisions can retire an old number and create a new one, so an older deed may show a number the county no longer uses.
Does the TMS number show my property lines?
It points to the parcel on the tax map, but tax map lines are approximate. Use the recorded plat and a licensed survey for exact boundaries.
Open the Platbookmapper county map South Carolina county parcel viewers
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey — especially for fences, setbacks, or boundary disputes.