---
title: "Free tools for cleaner books"
description: "Free calculators: outsourcing cost, in-house vs outsourced, DSO, AR aging, month-end close checklist and a bookkeeping health check."
url: https://ledgerbpo.com/tools/
updated: 2026-09-11
publisher: LedgerBPO (SS Support Network LLC)
language: en-US
---

# Free tools for cleaner books

Six free bookkeeping calculators and checklists: an outsourcing cost estimate, an in-house versus outsourced comparison, a DSO calculator, an AR aging calculator, a month-end close checklist generator and a ten-question bookkeeping health check. Each one shows its formula and sources, runs in your browser, and sends nothing unless you ask for a quote.

- 6 free tools
- Formulas shown
- No sign-up
- Runs in your browser

Updated September 2026

## Outsourced bookkeeping cost calculator

This free outsourced bookkeeping cost calculator estimates a monthly range for outsourced bookkeeping from your transaction volume, number of accounts and reporting needs, using published 2026 market ranges for the US, UK, Canada and Australia.

Open the tool

[Outsourced bookkeeping cost calculator](https://ledgerbpo.com/tools/outsourcing-cost-calculator/)

## In-house vs outsourced bookkeeper cost calculator

Use this cost of in house bookkeeper calculator to compare the fully loaded annual cost of hiring a bookkeeper (salary, employer taxes, benefits, software, overhead, recruiting and cover) with a dedicated remote accountant.

Open the tool

[In-house vs outsourced bookkeeper cost calculator](https://ledgerbpo.com/tools/in-house-vs-outsourced-calculator/)

## DSO calculator

This free DSO calculator works out days sales outstanding from your accounts receivable balance and credit sales for a period: DSO = (accounts receivable ÷ credit sales) × days in period.

Open the tool

[DSO calculator](https://ledgerbpo.com/tools/dso-calculator/)

## AR aging calculator

This free AR aging calculator takes the open balance in each aging bucket (current, 1 to 30, 31 to 60, 61 to 90 and over 90 days) and shows the share in each bucket, an estimated collectible amount using typical recovery rates by age, and the balance at risk.

Open the tool

[AR aging calculator](https://ledgerbpo.com/tools/ar-aging-calculator/)

## Month-end close checklist generator

This month end close checklist generator builds a close checklist for your business from a few answers: which accounts you have, whether you carry inventory, payroll, deferred revenue or multiple entities, and your market.

Open the tool

[Month-end close checklist generator](https://ledgerbpo.com/tools/month-end-close-checklist/)

## Bookkeeping health check

This bookkeeping health check asks ten yes-or-no questions about your books, from reconciled bank accounts to a documented close, and scores the answers out of 100 with a short explanation of what each gap costs.

Open the tool

[Bookkeeping health check](https://ledgerbpo.com/tools/bookkeeping-health-check/)

Next step

## Books closed. Invoices paid. Every month.

Tell us what is going on with your books or billing. You will hear from a named person within 1 business day, with a custom quote and a plan for the first close.

- Reply from a named person within 1 business day
- No setup fee, month-to-month
- Your software, your data, no lock-in

Start with a custom quote

[Get a custom quote](https://ledgerbpo.com/get-a-quote/) [Book a 20-minute call](https://ledgerbpo.com/book-a-call/) Or call [+1-657-777-0006](tel:+16577770006) during US, UK or Australian business hours.

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Source: https://ledgerbpo.com/tools/ · Contact: https://ledgerbpo.com/contact/ · Full site map for agents: https://ledgerbpo.com/llms.txt