Books that close themselves. A practice that doesn’t move your software.
Flat Fee Bookkeeping is a fixed-monthly retainer for small business owners who are tired of hourly-billing surprises. AI handles the coding and reconciliation; a human reviews every close before it lands. You keep QuickBooks, Xero, Wave, FreshBooks, Sage, or Zoho — we just connect in.
Known cost
Fixed before the work begins.
No migration
Six platforms, no rebuilds.
Human close
Every close, reviewed by a human.
Aug 2026
Sync
12 accounts
Code
1,284 transactions · 87% auto
Reconcile
Bank feeds · 3 anomalies flagged
Review
Human reviewer assigned
Deliver
Tue, 2pm CT
Flat retainer · Standard tier · $749/mo
Process
A month of books, end to end.
Every engagement runs the same way. The steps are repeatable; that’s what keeps your price flat and your delivery predictable.
Sync
All bank, credit, and payment accounts are pulled into your existing platform through a live feed. Nothing sits in a third-party silo.
Code
AI proposes a chart-of-accounts match for every transaction, ranked by your own historical patterns. Anything ambiguous is queued for human review — not guessed.
Reconcile
Bank feeds match against cleared transactions. Anything that doesn’t reconcile — duplicates, omissions, suspicious merchants — is flagged with a plain-English note.
Deliver
A human reviewer closes the books, walks the variance report, and sends a one-page summary. You reply when you want; we deliver on schedule.
Why a practice, not an app
Bookkeeping is a service, not a feature.
The price is the work.
Hourly billing rewards the slowest path. Flat tiers reward getting you a clean close on the same day each month. You stop watching the meter and start watching the books.
Your software is not the product.
Forcing a migration costs you weeks of retraining and a year of clean history. We connect into the tool your team already knows, and we don’t care which one you picked.
AI handles the volume. A human owns the answer.
Coding, reconciliation, and anomaly detection run on AI. Judgment, variance calls, and your monthly summary come from a person who has seen your books before. No glow-in-the-dark ‘AI close’ — every close is human-reviewed.
Compatibility
Works inside the software you already run.
Live connectors for the platforms small businesses actually use. No new login, no parallel ledger, no second source of truth.
6 platforms · 0 migrations
QuickBooks Online
Connector live
Xero
Connector live
Wave
Direct sync
FreshBooks
Direct sync
Sage
API + manual
Zoho Books
Direct sync
Pricing
Three tiers. One quote, in writing.
Every quote is a flat monthly retainer based on transaction volume, account count, and the tier of work you need. You’ll see the number before any work begins, and it stays the same month to month.
- Essential
For sole proprietors and very small teams that need clean monthly books.
from $349/month
- Up to 2 linked bank/credit accounts
- Up to 150 transactions / month
- AI coding + human-reviewed monthly close
- One short email Q&A per month
- StandardMost picked
For multi-account businesses that want ongoing cash-flow visibility.
from $749/month
- Up to 6 linked accounts
- Up to 750 transactions / month
- AI coding + bank-feed reconciliation
- Anomaly flagging + monthly review call
- Vendor & 1099 readiness check
- Controller
For teams that need controller-level oversight without hiring one.
from $1,450/month
- Unlimited accounts (within reason)
- Up to 2,500 transactions / month
- Mid-month check-in + end-of-month close
- Cash-flow forecast refresh
- Tax-prep handoff + year-end close
- Quarterly strategy hour
FAQ
Plain answers, in plain English.
If your question isn’t here, write to us — replies come from a person, not a queue.
Email a questionTalk to a human
The first conversation is free.
Tell us what software you run, roughly how many transactions a month move through it, and what you’d hand off. We’ll come back within a business day with a flat number — and a one-page scope you can sign.
flat-fee-bookkeeping@polsia.app · replied to within one business day