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The incumbent for one-person businesses is Intuit, not Monarch.
QuickBooks Solopreneur, the successor to Self-Employed, is built for exactly one person's business: automatic separation, Schedule C tracking, GPS mileage, receipts, invoicing. It has no personal side, no second entity, and does not compute what you owe. From its own pricing page, on a date.
| Capability | QuickBooks Solopreneur | Contha |
|---|---|---|
| Business and personal separation | Yes, automatic | Yes, personal and business on every row, with splits |
| Personal net worth alongside the business | No, business books only | Yes, every account, personal and business |
| Schedule C deduction tracking | Yes | Yes, by line; one per sole proprietorship |
| Quarterly estimated tax, computed | No | Yes, computed: four payments as a schedule, past due and next |
| More than one entity; S-corp, partnership | No, single owner by design | Yes, wrapper and treatment as two axes |
| GPS mileage | Yes | Yes, Pub. 463 substantiation per trip; no GPS |
| Receipt capture | Yes | Yes, on the row, with the $75 line stated |
| Invoicing, contractor payments | Yes | No, on purpose. Contha sits on top of the bank |
| Accountant access | Yes | Yes, five files and a read-only link that needs no account |
| Price | $20 a month Lite, $38 Simple Start (list) | A free week, then Personal $5, Solo $10, Owner $49 a month; two months free on annual billing |
Business and personal separation
- QuickBooks Solopreneur
- Yes, automatic
- Contha
- Yes, personal and business on every row, with splits
Personal net worth alongside the business
- QuickBooks Solopreneur
- No, business books only
- Contha
- Yes, every account, personal and business
Schedule C deduction tracking
- QuickBooks Solopreneur
- Yes
- Contha
- Yes, by line; one per sole proprietorship
Quarterly estimated tax, computed
- QuickBooks Solopreneur
- No
- Contha
- Yes, computed: four payments as a schedule, past due and next
More than one entity; S-corp, partnership
- QuickBooks Solopreneur
- No, single owner by design
- Contha
- Yes, wrapper and treatment as two axes
GPS mileage
- QuickBooks Solopreneur
- Yes
- Contha
- Yes, Pub. 463 substantiation per trip; no GPS
Receipt capture
- QuickBooks Solopreneur
- Yes
- Contha
- Yes, on the row, with the $75 line stated
Invoicing, contractor payments
- QuickBooks Solopreneur
- Yes
- Contha
- No, on purpose. Contha sits on top of the bank
Accountant access
- QuickBooks Solopreneur
- Yes
- Contha
- Yes, five files and a read-only link that needs no account
Price
- QuickBooks Solopreneur
- $20 a month Lite, $38 Simple Start (list)
- Contha
- A free week, then Personal $5, Solo $10, Owner $49 a month; two months free on annual billing
Checked 8 September 2026, against QuickBooks Solopreneur’s own published documentation: the Solopreneur pricing and features page. If a row is out of date, tell us and it will be corrected on the page, not deleted.
The honest read
If you invoice from it, keep it. Put Contha on top.
Solopreneur is a bookkeeping tool with invoicing; Contha is the whole financial life with the return done properly. They read the same bank accounts. Many people will keep their invoicing where it is and use this for the part that used to be a spreadsheet in March.
Also against Monarch Plus, Found, Keeper, Copilot Money, YNAB, Wave, Tiller.
Keep QuickBooks if it is enough. If the tax is the reason you are here, start with Contha.
A free week, no card. Then Personal $5, Solo $10, Owner $49 a month. Read-only connections, cancel any time.