CPA Field Guide / US tax & accounting
No pay-to-list

The software US CPA firms run on.

Every tool a US tax and accounting firm actually runs on — defined plainly, priced, and rated for how open it is to integration.

25 tools4 categoriesUpdated Jul 2026
Firm size

Tax Preparation

7 tools

The engine a US tax practice runs on — prepares, reviews, and e-files every entity return (1040 through 990) across multiple states, on a preparer-and-reviewer workflow.

How we define this category

To qualify for inclusion in Tax Preparation, a product must:

  • Prepare and calculate US federal and state income tax returns for multiple entity types
  • Support IRS Modernized e-File (MeF) and the corresponding state e-filing
  • Carry client and return data forward between tax years
  • Provide distinct preparer and reviewer steps for in-firm review
  • Maintain a roster of clients with their entity and return types
Solo

Full 1040 and business tax-prep suite — the high-volume, low-cost favorite of sole practitioners.

From $2,145/yr
Export onlydrakesoftware.com
Small · mid

Intuit's high-end desktop tax software for complex individual and business returns.

Custom · per-return
Local SDKintuit.com
Solo · small

Intuit's cloud professional tax prep, tied into QuickBooks Online Accountant.

Pay-per-return
No API yetintuit.com
Small

Intuit's desktop tax suite for higher-volume 1040 practices.

From $419/yr
Export onlyintuit.com
Mid · large

Thomson Reuters' tax engine for mid-to-large firms; anchor of the CS Professional Suite.

Custom quote
Export onlythomsonreuters.com
Mid · enterprise

Wolters Kluwer's cloud tax, document, and workflow suite for larger firms.

From $2,299/yr
Partner APIwolterskluwer.com
Solo · small

Wolters Kluwer's budget, forms-based tax software for smaller practices.

From $939/yr
Export onlywolterskluwer.com

Deadlines & Due Date Tracking

3 tools

Keeps client filings from slipping — passive trackers roll your dates forward; active monitors also watch the IRS, state agencies, and FEMA, and flag when a date changes and who it hits.

How we define this category

To qualify for inclusion in Deadline & Compliance Tracking, a product must:

  • Track statutory filing due dates and extensions for a firm's clients
  • Roll recurring deadlines forward across periods and tax years
  • Alert or remind the firm ahead of upcoming due dates
  • (Active monitors) detect changes to official filing dates or rules and identify the affected clients
Solo · small

Records client due dates and rolls them forward each year — a classic passive tracker.

Paid license
Export onlytimevalue.com
Solo · small

Monitors the IRS, states, and FEMA and flags which clients a filing-date change hits. Free in beta.

Free · beta
No API yetduedatehq.com

Practice Management

10 tools

Runs a firm's front and back office — workflows, client records, deadlines, and billable time in one place: who's doing what, for which client, by when.

How we define this category

To qualify for inclusion in Practice Management, a product must:

  • Maintain the catalog of services the firm offers
  • Manage relationships with clients and prospects
  • Track tasks, deadlines, and activities across the practice
  • Track the status of each engagement and capture billable time
  • Provide a portal or secure channel for client communication
  • Generate invoices for services and track payment
Small · mid

All-in-one practice management — workflow, email, and billing — with the category's deepest API.

From $59/user/mo
Open APIkarbonhq.com
Solo · mid

All-in-one practice management with a client portal, e-signature, and invoicing.

From $67/user/mo
Open APItaxdome.com
Small · mid

Modular practice management: CRM, workflow, documents, and billing.

From $45/user/mo
Gated APIgetcanopy.com
Solo · small

Month-end close and bookkeeping workflow with a two-way QuickBooks sync. Rebranded to Double in late 2025 — same product and pricing.

From $200/mo
Zapier onlydoublehq.com
Small · mid

All-in-one practice management — projects, documents, billing, and a portal.

From $49/user/mo
Zapier onlymyfirm360.com
Solo · small

Simple practice management for small firms: client database, jobs, and email.

From $129/mo
Zapier onlyusepixie.com
Mid · enterprise

Billing and revenue-cycle automation for large firms, layered on existing systems.

Custom · enterprise
Partner APIaiwyn.ai
Solo · mid

Proposals, engagement letters, and automated billing for accounting firms.

From $39/mo
Zapier onlyignitionapp.com

Accounting & Bookkeeping

5 tools

The client's book of record — bank feeds, invoicing, bills, reporting. QuickBooks Online and Xero dominate, so most firm tools connect back here, making this the hub of a firm's stack.

How we define this category

To qualify for inclusion in Accounting & Bookkeeping, a product must:

  • Record and categorize a business's financial transactions in a general ledger
  • Support bank and credit-card feeds and reconciliation
  • Produce core financial statements (profit & loss, balance sheet)
  • Provide an accountant or firm view into client books
  • Offer invoicing and/or accounts-payable functions
Solo · mid

Cloud accounting ledger, strong internationally, with a broad app ecosystem.

From $25/mo
Open APIxero.com
Small · mid

AP/AR automation and payments for firms and their clients.

From $45/user/mo
Open APIbill.com
Small · enterprise

Accounting from small business (Sage Accounting) to mid-market (Sage Intacct).

From ~$10/mo
Gated APIsage.com
Channel

Intuit's free accountant program around QuickBooks — discounts, training, and firm tools.

Free · program

Nothing matches. Loosen a filter.

Open API — self-serve key Gated API — approval / plan / partner Zapier only — no direct API No public API — export only, or not yet

Guides

Popular comparisons

Frequently asked questions

What is the best tax preparation software for a small CPA firm?

It depends on volume and return complexity. Drake Tax leads among sole practitioners on price and speed; Intuit Lacerte and ProConnect suit small firms with more complex returns; Thomson Reuters UltraTax CS and Wolters Kluwer CCH Axcess dominate at mid-to-large firms. (2025 AICPA tax software survey.)

Which CPA practice management software has an open API?

Karbon and TaxDome offer near-self-serve APIs with webhooks, and Financial Cents exposes an open API on higher plans. Canopy's API is approval-gated. Keeper, Firm360, and Pixie integrate mainly through Zapier rather than a direct API.

What is the difference between a deadline tracker and a compliance monitor?

A passive tracker such as File In Time records the due dates you enter and rolls them forward each year. An active monitor such as DueDateHQ additionally watches official sources — the IRS, state tax agencies, and FEMA — and flags when a filing date changes and which of your clients it affects.

How is CPA Field Guide different from G2 or Capterra?

It is editorial and vendor-neutral. No vendor pays for inclusion, placement, or ranking, and there is no sponsored sort. Every tool is described only by capabilities it has shipped, sourced from the vendor's own documentation, and organized around US tax-practice workflows.

Which accounting software integrates with QuickBooks Online?

QuickBooks Online offers a self-serve public API and an app store, so most firm tools connect to it — including practice-management platforms like Karbon and Canopy and bookkeeping-workflow tools like Keeper, which offers a two-way sync. Xero provides a comparable open API.

What tax software do the largest US accounting firms use?

At the largest firms, Thomson Reuters UltraTax CS and Wolters Kluwer CCH Axcess Tax lead, per the 2025 AICPA survey — both are suite or cloud systems with deeper integration and e-file capacity than the desktop products favored by smaller shops.

How this guide works

Most software directories rank by who pays. This one doesn't. It's a plain editorial reference, written to be useful to a working firm rather than to any vendor — including the one that maintains it.

No pay-to-list

No vendor pays for inclusion, placement, or ranking. There is no "sponsored" sort and no paid badges. Every product that meets a category's criteria can appear.

Only shipped capabilities

Each tool is described only by features it has actually released, sourced from the vendor's own product and developer documentation (reviewed July 2026). Roadmap items are not counted.

Categories a firm recognizes

Categories follow how US practices actually evaluate software, each with a stated definition and inclusion criteria. Deadline tracking is treated as a capability of practice management, with a small specialist list called out.

Who maintains it

CPA Field Guide is written and maintained by the team behind DueDateHQ, a deadline-monitoring tool listed in the guide. We describe every product — ours included — by the same standard, and never rank ours above its peers.

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