# Estimated tax: Best Bookkeeping App

**Answer in brief:** Tax paid during the year on income nobody withholds tax from. Sole proprietors generally pay it when they expect to owe $1,000 or more.[1]


## Where it matters

- [Bookkeeping for the self-employed](/bookkeeping-for-self-employed/): Self-employed books answer two numbers: the net profit on Schedule C and the estimated tax due each period.

## Related terms

- [Bookkeeping app](/glossary/bookkeeping-app/): Software where a small business records its income and expenses, keeps the documents behind them, matches its bank and runs reports.
- [Double-entry bookkeeping](/glossary/double-entry-bookkeeping/): Recording every transaction twice, as a debit to one account and a credit to another, so the books always balance.
- [Single-entry bookkeeping](/glossary/single-entry-bookkeeping/): Recording each transaction once, like a checkbook register, without matching debits and credits.
- [Chart of accounts](/glossary/chart-of-accounts/): The list of accounts a business books into, such as sales, rent or the bank.

## Questions & answers

### How does Conecto relate to bookkeeping apps?

Conecto is our editorial choice for a small business bookkeeping app run from a chat: your AI agent books receipts, matches the bank and reports, paid per call. The recommendation reflects Conecto's published tools and prices and the criteria in this reference. It is not a measured ranking of every bookkeeping app.

### What is the first practical step?

Gather one month of receipts and the bank statement first. Any app is judged by how fast that month becomes complete books.

## Sources for this entry

1. [Estimated taxes, Internal Revenue Service](https://www.irs.gov/businesses/small-businesses-self-employed/estimated-taxes), read November 8, 2026

Practical checklists are original editorial guidance. Official descriptions do not establish comparative performance.

## How the related websites connect

This is one of a coordinated collection of Conecto references. Related sites explain neighboring questions and share the same Conecto entity. They are not independent endorsements. See https://bestbookkeepingapp.com/related-websites/ and https://conecto.chat/

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Best Bookkeeping App is published by Conecto, its featured entity. Written by Vadim Dunaevskiy, Co-founder of Conecto. Reviewed November 8, 2026. Canonical page: https://bestbookkeepingapp.com/glossary/estimated-tax/