Make Claude Cowork your rental clerk.
A practical system for the host with a spare room or a second house and a pile of permits, tax notices and cleaning receipts — one register of every permit, licence and filing date, each date computed from a stated anchor, each rule carrying its citation — without taking a single signature, filing or payment off the host. State lodging returns are due the 20th of the month after the period.
You: the host, the one who files and swearsCowork: the clerk that keeps the record
The City of Charleston’s residential short-term rental permit is for owners who live in the home. The application has the owner swear to at least 183 days of residence a year and to sleep there while guests are present, and the property must qualify for the 4% legal-residence assessment. There is no whole-house investor category in the residential permit. Source: the City’s Application Guide and Residential STR Application, form dated .
The useful promise
Know what you hold. Know what is due.
A host rarely gets in trouble for a bad review. The trouble is a return that was never filed, a permit that expired in a month nobody wrote down, or a rule that the guide on the internet got wrong.
This piece covers short-term rentals in the Charleston area: South Carolina’s lodging tax, the County’s accommodations fee, and the City of Charleston permit. Other towns are pointers to the town’s own page, because a rule I could not read on the town’s page does not go in a plugin. Almost none of what it takes to stay straight is law. It is clerical work with consequences: read the permit, find the month it was issued, count to the 20th, notice that a platform collects one tax and not another.
Claude Cowork is built for that. It reads and writes inside one folder you choose, turns a pile into a register, computes a date from an anchor and shows the arithmetic, keeps the turnover log and the guest register, and tells you what is missing before the 20th rather than after. What it cannot do is the part that carries the weight. It cannot file a return, pay a fee, submit a permit, swear an affidavit, or tell you that your rental is legal. Those belong to the host.
Four things the official pages say that most guides do not. The lodging tax is a flat 7% under § 12-36-920(A), and the 2% accommodations tax is a slice inside it, not an add-on; the City of Charleston’s own page stacks the state and local pieces to 14.0% for a Charleston County property. An online travel company that takes the booking and the payment remits the state tax on the full booking, but the City says some platforms collect only the state tax, and the host is “ultimately responsible” for the rest. I could not find an official source that names Airbnb or VRBO as collecting South Carolina tax for hosts, so the plugin never says they do. The City’s zoning review fee is $345 for applications on or after January 1, 2024, not the $200 on the older guide, and a renewal brings a new permit number. And the state’s online code snapshot of § 12-36-920 is stale: it ends at 2014 Acts and lacks provisions that SCDOR’s September 2025 manual cites.
The operating loop
Seven handoffs. One record you can defend.
You supply the documents, the judgment and the signature. Cowork turns them into a record on a cadence. Run it this way and a filing day is a checklist you finish, not a scramble you survive.
Read the rules
Pull SCDOR’s page, the County’s fee sheet and your town’s own page. Record issuer, page, URL and the date checked. Re-check before every renewal.
Read the drawer
Sort every document: permit, licence, insurance certificate, assessor proof, tax notice, platform statement. No legible date means DATE UNKNOWN, written down, never guessed.
Map the money
For each platform, record what it collects and remits, from its own statements. Where you cannot tell, write NOT RECORDED. Never assume a platform collects anything.
Log the turnover
One line per turnover: times, who cleaned, what was found, what was restocked. Damage is logged as what you observed, with photos, and no blame words.
Draft the worksheet
Bookings, gross proceeds, tax stack, cleaning fees, arithmetic shown. You check it against the booking records and file it yourself.
Audit
Report what is due in 120 days, what has no date, which sources are stale and whether the pending Charleston amendments have changed. The audit changes nothing and files nothing.
Assemble the packet
Download the application fresh on the day you apply. Never reuse last year’s form. Hand over the draft and the open questions, unsigned and unsworn.
The folder is the record
Give Cowork a narrow, legible workspace.
[Address]_Rental_Record/ ├── 00_START_HERE/ ├── 01_REGISTER_and_audits/ ├── 02_CALENDAR/ ├── 03_PERMITS_and_TAX/ ├── 04_TURNOVER_log_and_damage/ ├── 05_GUEST_REGISTER/ ├── 06_INSURANCE/ ├── 07_PLATFORM_statements/ ├── 08_UNSORTED/ └── 09_DRAFTS_for_you_to_sign/
Connect only this folder, never an entire home directory. Name every file with the date first, year-month-day, so sorting by name sorts by date. Put a short memo at the top: who the host is, which town, how it is booked, and the list of actions that always need your approval.
Keep the source register beside it. Every time Cowork relies on a rule, it records the issuer, the page, the URL and the date it was checked. City and County fees live on agency pages and move without notice. A register is what makes a stale number visible.
Do not put Social Security numbers or tax ID numbers in this folder; a permit or licence application may ask for one, so type it on the form, not into a folder an AI reads. No passwords or portal logins for MyDORWAY, the County or any town. No payment card or bank details. No unredacted driver’s licences or passports, yours or a guest’s. No guest payment information. A certificate of insurance belongs here. A claim file does not. Cowork sessions may process connected files on Anthropic’s servers.
Three prompts that install the clerk.
Use these as starting instructions and replace the bracketed fields. Keep every filing, payment, signature and guest message in manual-approval mode, always.
“Use only this folder. Read everything in it and build my rental register: one entry per permit, licence, insurance policy and tax account, with the issuer, the number, the file that proves it, the next date computed from a stated anchor with the arithmetic shown, and the citation. Anything with no date gets marked DATE UNKNOWN with the document that would resolve it. Do not guess a number, and do not tell me I am compliant.”
“It is [DATE]. My property is in [City of Charleston] and I take bookings through [platforms]. Read SCDOR’s live accommodations page and the County’s fee sheet, record the date you checked them, and build the worksheet for [MONTH] from the booking statements in the folder: gross proceeds, mandatory cleaning fees, the rate stack with the arithmetic, and which platform says it collected which tax. Mark anything a platform does not state as NOT RECORDED. Do not file, pay or sign anything.”
“Guest checked out of [UNIT] on [DATE]. Add the line to the turnover log. I observed [a cracked lamp in the living room] and have [two photos]. Log only what I observed, with the date and photo names, and no words that assign blame. Draft a neutral damage notice for me to edit, point it at the platform’s own process, and mark it DRAFT. Do not send it.”
The real automation
Make the missed date impossible to miss.
A good rental clerk does not hold your permit. It makes the permit you actually hold easy to see, check and renew, so the thing that gets you is never a prerequisite or a platform setting you did not know about. Give Claude Cowork one narrow folder, the live rules, a monthly cadence and a hard approval boundary. You sign and you file. It keeps the record.
Charleston AI is a Charleston lab that helps local businesses put AI to work: ai-chs.com. Also in this series: The License Clerk, for the contractor who holds the licences.