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Tiller is your bank feed in a spreadsheet. Contha is the spreadsheet you were going to build.
Tiller feeds transactions into Google Sheets or Excel for $99 a year, and its community keeps templates, including a quarterly tax template. It is the honest choice for someone who wants to own the formulas. This page is for someone who would rather the formulas came built and stated.
| Capability | Tiller | Contha |
|---|---|---|
| Bank feeds into a spreadsheet | Yes | No; a ledger, with CSV in and out |
| Own the formulas | Yes | No; the arithmetic is tested code, with the limits written down |
| Quarterly estimated tax | A community template | Yes, computed: four payments as a schedule, past due and next |
| Entities, S-corp, partnership | Whatever you build | Not yet; one sole proprietorship or single-member LLC today |
| Accountant handoff | Share the sheet | Yes, five files and a read-only link that needs no account |
| Honest about dead feeds | A feed that stops leaves rows missing | Every figure says which feeds are behind; one email when a feed dies |
| Price | $99 a year | A free week, then Personal $5, Business $10 a month; two months free on annual billing |
Bank feeds into a spreadsheet
- Tiller
- Yes
- Contha
- No; a ledger, with CSV in and out
Own the formulas
- Tiller
- Yes
- Contha
- No; the arithmetic is tested code, with the limits written down
Quarterly estimated tax
- Tiller
- A community template
- Contha
- Yes, computed: four payments as a schedule, past due and next
Entities, S-corp, partnership
- Tiller
- Whatever you build
- Contha
- Not yet; one sole proprietorship or single-member LLC today
Accountant handoff
- Tiller
- Share the sheet
- Contha
- Yes, five files and a read-only link that needs no account
Honest about dead feeds
- Tiller
- A feed that stops leaves rows missing
- Contha
- Every figure says which feeds are behind; one email when a feed dies
Price
- Tiller
- $99 a year
- Contha
- A free week, then Personal $5, Business $10 a month; two months free on annual billing
Prices as of October 2026, read on their own pricing page 19 October 2026. Checked 11 October 2026, against Tiller’s own published documentation: the Tiller pricing 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 If a row is out of date, tell us and it will be corrected on the page, not deleted.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 like building it, Tiller. If you want it built, this.
Both read the same banks. One hands you cells; the other hands you the number and the package.
Also against Monarch Plus, QuickBooks Solopreneur, Found, Keeper, Copilot Money, YNAB, Wave, Collective, Lili, Hurdlr, FreshBooks.
Keep Tiller if it is enough. If the tax is the reason you are here, start with Contha.
Free with one bank, no card. Personal $5 or Business $10 a month for the rest, a free week of either first. Read-only connections, cancel any time.