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Accounting · head to head

IRIS KashFlow vs TaxAct

IRIS KashFlow logo

IRIS KashFlow

Accounting

Online accounting software for UK sole traders and small businesses

From
£13.5/month
Rated
-
Full reviewWebsite
TaxAct logo

TaxAct

Accounting

Get your maximum refund, guaranteed

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only TaxAct has a free tier, so it costs nothing to try first.
  • Each has a real cost: IRIS KashFlow advertised monthly prices of £1.35 (Starter) and £2.75 (Business) are a 90% promotional discount off the standard £13.50 and £27.50 rates, and the promotion is described as lasting 6 months before reverting; TaxAct free edition available only to approximately 40% of filers
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which IRIS KashFlow and TaxAct actually diverge.

Attributes where IRIS KashFlow and TaxAct differ
AttributeIRIS KashFlowTaxAct
Starting price£13.5/monthFree
Pricing modelsubscriptionone-time
Free tierNoYes

Identical on both: platforms (Web), user rating (Not yet rated), category (Accounting).

What people use each for

The jobs each tool is most often brought in to do.

IRIS KashFlow

  • business accountingnot TaxAct
  • invoicing and billingnot TaxAct
  • VAT managementnot TaxAct

TaxAct

  • Individual tax filingnot IRIS KashFlow
  • Self-employed tax preparationnot IRIS KashFlow

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

IRIS KashFlow

  • Advertised monthly prices of £1.35 (Starter) and £2.75 (Business) are a 90% promotional discount off the standard £13.50 and £27.50 rates, and the promotion is described as lasting 6 months before reverting
  • Listed prices are in GBP plus VAT, and the platform's plans are built around UK VAT filing rather than other tax regimes
  • Annual pricing is quoted at RRP £162/year (Starter) and £291.50/year (Business) before the same promotional reduction

TaxAct

  • Free edition available only to approximately 40% of filers
  • Pricing excludes separate state filing fees
  • Xpert Full Service pricing available on request only

Pricing, plan by plan

IRIS KashFlow

£13.5/month
  • Starter Monthly$13.5/month
    • 10 invoices
    • up to 25 bank transactions
    • single user access
  • Business Monthly$27.5/month
    • unlimited invoices
    • unlimited bank transactions
    • multi-user access
  • Starter Annual$162/year
    • 10 invoices
    • up to 25 bank transactions
    • single user access
  • Business Annual$291.5/year
    • unlimited invoices
    • unlimited bank transactions
    • multi-user access

TaxAct

Free
  • Free EditionFree
    • W-2 income
    • Unemployment
    • Basic credits and deductions
  • Deluxe$59.99/tax-year
    • All Free Edition features
    • Home ownership deductions
    • Childcare and dependent care
  • Premier$99.99/tax-year
    • All Deluxe features
    • Investment income and capital gains
    • Cryptocurrency reporting
  • Self-Employed$109.99/tax-year
    • Complete business support
    • For contractors, freelancers, and sole proprietors

Which should you pick?

Choose IRIS KashFlow if

Nothing in the data separates IRIS KashFlow from TaxAct on the points above - pick on price and on how each one feels to use.

IRIS KashFlow review

Choose TaxAct if

  • You want to start without paying.
TaxAct review

Questions people ask

Is IRIS KashFlow or TaxAct better?
Neither clearly leads. IRIS KashFlow starts at £13.5/month and TaxAct at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, IRIS KashFlow or TaxAct?
TaxAct has a free tier; the other does not. Paid plans start at £13.5/month for IRIS KashFlow and Free for TaxAct.
Does IRIS KashFlow or TaxAct run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use TaxAct for free?
Yes. TaxAct has a free tier, so you can try it without paying. IRIS KashFlow starts at £13.5/month.
What is IRIS KashFlow best used for?
IRIS KashFlow is most often used for business accounting, invoicing and billing, vat management. Of those, business accounting and invoicing and billing are not what TaxAct is typically brought in for.

Answered from the vendors’ own pages

IRIS KashFlow: What are IRIS KashFlow's core features across all plans?

All IRIS KashFlow plans include unlimited quotes, online VAT submission, mobile app access, 50+ reports, bank feeds, receipt capture, multi-currency support, and payroll for up to 5 employees.

Source
TaxAct: How much does TaxAct cost?

TaxAct offers a free edition for approximately 40% of filers, Deluxe at $59.99, Premier at $99.99, and Self-Employed at $109.99 per tax year.

Source
IRIS KashFlow: Are there promotional discounts for new IRIS KashFlow customers?

Yes, new customers receive a 90% discount for 6 months on both Starter and Business monthly plans.

Source
TaxAct: Is TaxAct truly free for eligible filers?

Yes, TaxAct's Free Edition is available at no cost for W-2 employees, students, and filers meeting basic income and deduction requirements.

Source
IRIS KashFlow: Can multiple users access IRIS KashFlow on the Starter plan?

No, the Starter plan is limited to single-user access only. Multi-user access requires the Business plan.

Source
TaxAct: What is the difference between Premier and Deluxe plans?

Premier adds support for investment income, capital gains, cryptocurrency, rental properties, and home sale reporting compared to Deluxe.

Source
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