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Accounting · head to head

IRIS KashFlow vs TurboTax

IRIS KashFlow logo

IRIS KashFlow

Accounting

Online accounting software for UK sole traders and small businesses

From
£13.5/month
Rated
-
Full reviewWebsite
TurboTax logo

TurboTax

Accounting

File yourself with clear, step-by-step tools, or hand it to an expert

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only TurboTax 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; TurboTax pricing varies significantly based on tax complexity and filing date
  • Prices and features above were last checked on 29 August 2026.

Where they differ

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

Attributes where IRIS KashFlow and TurboTax differ
AttributeIRIS KashFlowTurboTax
Starting price£13.5/monthFree
Pricing modelsubscriptionfreemium
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 TurboTax
  • invoicing and billingnot TurboTax
  • VAT managementnot TurboTax

TurboTax

  • Individual tax filing for US residentsnot IRIS KashFlow
  • Complex tax scenarios requiring multiple schedules and formsnot IRIS KashFlow
  • Expert assistance or full tax preparation servicesnot 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

TurboTax

  • Pricing varies significantly based on tax complexity and filing date
  • Final price determined at filing time, subject to change without notice
  • Additional state return fees apply beyond federal pricing

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

TurboTax

Free
  • Free EditionFree
    • Simple Form 1040 returns only (~37% of taxpayers eligible)
  • Deluxe$59/one-time
    • Anticipated price, for more complex tax situations
  • Premium$79/one-time
    • Anticipated price, for complex tax scenarios with additional schedules
  • Expert Full Service$null/one-time
    • Custom pricing based on tax situation, forms required, and filing date

Which should you pick?

Choose IRIS KashFlow if

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

IRIS KashFlow review

Choose TurboTax if

  • You want to start without paying.
TurboTax review

Questions people ask

Is IRIS KashFlow or TurboTax better?
Neither clearly leads. IRIS KashFlow starts at £13.5/month and TurboTax at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, IRIS KashFlow or TurboTax?
TurboTax has a free tier; the other does not. Paid plans start at £13.5/month for IRIS KashFlow and Free for TurboTax.
Does IRIS KashFlow or TurboTax run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use TurboTax for free?
Yes. TurboTax 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 TurboTax 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
TurboTax: How much does TurboTax cost?

TurboTax offers a free option for simple returns (~37% of filers), Deluxe at $59, Premium at $79, and Expert Full Service with custom pricing determined at filing time. Actual prices are subject to change and vary based on tax situation complexity.

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
TurboTax: Is there a free version of TurboTax?

Yes, TurboTax Free Edition is available at no cost for simple Form 1040 returns. Eligibility is limited to approximately 37% of taxpayers with straightforward tax situations.

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
TurboTax: What extra fees apply when using TurboTax?

State return preparation requires additional fees beyond federal pricing. Price adjustments also apply based on the version selected and the date you file or e-file, as stated in TurboTax terms.

Source
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