Bookkeeping built for single-owner US businesses

Clean books.
The right year-end forms.

Bookkeeping for US sole proprietors and single-member LLCs — foreign-owned or US-resident. We turn your Mercury (or any US bank) transactions into the Schedule C, pro-forma 1120, or Form 5472 + 1120 package your accountant otherwise charges $1,500–3,000 to prepare.

Early access opening soon. No credit card. Free up to one entity. Mercury-native. CSV import for everything else.

[ 01.5 — Who uses Dissregarded ]

Three kinds of single-owner businesses.

US Sole Proprietor

Sole props doing real numbers.

Side-income contractor or full-time freelancer — Mercury Personal or Mercury Business — Schedule C at year end. Clean P&L, capital account, no surprises.

→ Schedule C (Form 1040)

US-Resident SMLLC

Wyoming, Delaware, anywhere.

US-resident owner of a single-member LLC. Disregarded entity, Schedule C overlay. Plus capital-account tracking your CPA actually wants to see.

→ Schedule C + Capital Account

Foreign-Owned US LLC

Disregarded, but never ignored.

Non-US resident running a US LLC. We're the only tool that auto-categorizes for the 5472 Part IV line codes and generates the pro-forma 1120 cover.

→ Form 5472 + pro-forma 1120

[ 02 — Why now ]

Wave is dying.
The IRS is not.

Wave Accounting (Nov 2025) Dissregarded
Free bank sync ending
Mercury direct API, no aggregator fees
US-resident assumed
Foreign-owner first, US sole prop fine too
No 5472 support
5472 Part IV/V mapped per transaction
No 1120 cover sheet
Generates the pro-forma 1120 for you
Acquired by H&R Block
Solo-founder built, narrow on purpose

$25,000

Minimum IRS penalty for a missed or wrong Form 5472. Per year. Per entity. (Foreign-owned LLCs)

$485

Average late-filing penalty for an unfiled Schedule C with self-employment tax owed. (US sole props.)

IRC § 6038A(d) for 5472; IRS Topic No. 653 for Schedule C late-file. Both double for continued failure.

[ 03 — How it works ]

Three steps. Then you close the year.

01
Connect Mercury (or upload CSV).
Read-only OAuth, AES-256-GCM token at rest. CSV import covers every other bank — Chase, Bluevine, Wise, your bank.
02
Categorize once, the right way.
Every transaction tagged with the 5472 Part and Line code it belongs to. Owner draws don't get mislabeled "contractor payments."
03
Download year-end package.
Form 5472 + pro-forma 1120 + capital account summary. PDF you mail. CPA-acceptable. One click.
[ 04 — What it doesn't do ]

A short list of things we won't build.

No chat-with-AI sidebar.

This is a ledger. Not a copilot.

No invoicing or payments.

Mercury already does that. We don't compete.

No mobile app.

Annual filing isn't a phone task.

No tax filing.

We produce the PDF. You mail it, fax it to the IRS, or hand it to your CPA.

No multi-currency consolidation.

Each entity has one reporting currency.

No payroll / W-2s.

Foreign-owned SMLLCs don't have US payroll.

[ 04.5 — Banking ]

We recommend Mercury.

Mercury is the bank we built Dissregarded on, and the bank we use ourselves. Their direct API means no third-party aggregator fees, no 90-day reconnect dance, and read-only OAuth scopes that physically cannot move money. For single-owner US businesses, it's the cleanest fit we've found.

If you're not on Mercury yet, opening an account takes about 15 minutes — they accept foreign founders, sole proprietors, and US-resident LLC owners equally. There's no monthly fee on the free tier.

We earn a small referral fee if you open a Mercury account through this link. We'd recommend them with or without it — they're the bank we use ourselves.

[ 05 — Security ]

Plainly stated.

Tenant isolation

One Postgres database per organization. Cross-tenant queries are physically impossible.

Bank tokens

Encrypted at rest with AES-256-GCM, KEK held outside the database.

Bank access

Read-only only. We never request, store, or use scopes that could move money.

Model training

No model training on your data. Yours stays yours.

Error tracking

Self-hosted. Headers stripped before storage. No third-party PII processors.

Export & delete

Per-entity export and delete on demand. Privacy Policy →

[ 06 — Pricing ]

$0

First entity, including the year-end 5472 package. Forever.

Paid plans for additional entities will be under $5/entity/month. Final pricing TBD before public launch — no card on file until you opt in.

See pricing detail →
[ 07 — Common questions ]

Common questions.

Do I still need an accountant?
For a complex year, yes. For a quiet year of a single-member LLC with under $300K revenue and 10 reportable transactions on the 5472? Probably not — the PDF we generate is what your accountant would produce, and you can have them spot-check it for an hour instead of paying them to do the whole thing.
What if my bank isn't Mercury?
Three options. SimpleFIN covers ~95% of US banks (Chase, BofA, Wise USD, Bluevine, Brex) for $1.50/mo — paid to SimpleFIN, not us. Upload a CSV from your bank's export — works for any bank on earth, including foreign ones. Or open a Mercury account — it's free, the API is the cleanest of any US bank we've tested, and we explain why in detail.
Can I import my history from Wave?
Yes — export Wave as CSV and upload it. Categories carry over for common patterns.
Will you file my taxes?
No. We generate the PDF — you decide how it gets filed. Three options the IRS accepts for Form 5472 + pro-forma 1120: mail it (certified, with return receipt), fax it directly to the IRS, or hand it to your CPA. We thought about adding a "we'll fax it for you" button, but doing it yourself gives you a confirmation receipt with your own name on it — which is exactly the reassurance you want when the penalty for getting it wrong is $25,000.
What if the IRS form changes?
We track the IRS revision date in the generated PDF metadata. When the IRS releases a new revision, we update the template and your next download uses it. December 2024 is current.
Is my data safe if Dissregarded disappears?
Your data exports as a single SQL dump + a PDF of every form you've generated, available on demand. The bookkeeping ledger uses standard double-entry accounts, so any other accounting software can import it.