Is Bill.com or IRIS KashFlow better?

Neither clearly leads. Bill.com starts at Free and IRIS KashFlow at £13.5/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Bill.com or IRIS KashFlow?

Bill.com has a free tier; the other does not. Paid plans start at Free for Bill.com and £13.5/month for IRIS KashFlow.

Does Bill.com or IRIS KashFlow run on more platforms?

Both run on Web, so platform support will not decide this one for you.

Can I use Bill.com for free?

Yes. Bill.com has a free tier, so you can try it without paying. IRIS KashFlow starts at £13.5/month.

What is Bill.com best used for?

Bill.com is most often used for invoice processing, bill payments, vendor payments, cash flow management. Of those, invoice processing and bill payments are not what IRIS KashFlow is typically brought in for.

What can Bill.com do that IRIS KashFlow cannot?

Bill.com covers AP automation, AR automation, Payment processing, Approval workflows.

Accounting · head to head

Bill.com vs IRIS KashFlow

Bill.com

Accounting

Automate your financial workflows

From: Free
Rated: -

Full review Website

IRIS KashFlow

Accounting

Online accounting software for UK sole traders and small businesses

From: £13.5/month
Rated: -

Full review Website

The short version

Only Bill.com has a free tier, so it costs nothing to try first.
Each has a real cost: Bill.com limited customization of approval workflows and user permissions for complex business needs; 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
Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Bill.com and IRIS KashFlow actually diverge.

Attributes where Bill.com and IRIS KashFlow differ
Attribute	Bill.com	IRIS KashFlow
Starting price	Free	£13.5/month
Pricing model	Unknown	subscription
Free tier	Yes	No
Founded	2006	Unknown

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

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Bill.com

AP automation
AR automation
Payment processing
Approval workflows
Document management
Vendor management
Cash flow insights
Mobile approvals

Only in IRIS KashFlow

Nothing recorded that Bill.com does not also cover.

What people use each for

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

Bill.com

Invoice processingnot IRIS KashFlow
Bill paymentsnot IRIS KashFlow
Vendor paymentsnot IRIS KashFlow
Cash flow managementnot IRIS KashFlow
Financial automationnot IRIS KashFlow

IRIS KashFlow

business accountingnot Bill.com
invoicing and billingnot Bill.com
VAT managementnot Bill.com

Where each one falls short

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

Bill.com

Limited customization of approval workflows and user permissions for complex business needs
Limited international payment capabilities compared to specialists like Tipalti
Customer support response times are slow, with agents often lacking product expertise

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

Pricing, plan by plan

Bill.com

Free

Essentials$49/month
- Core AP and AR functionality
- Manual CSV import/export
Team$65/month
- Automatic 2-way sync with QuickBooks Online, Xero
Corporate$89/month
- Procurement features
- Custom approval policies
- Sync with NetSuite, Dynamics

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

Which should you pick?

Choose Bill.com if

You need ap automation.
You want to start without paying.
You also want ar automation.

Bill.com review

Choose IRIS KashFlow if

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

IRIS KashFlow review

Questions people ask

Is Bill.com or IRIS KashFlow better?: Neither clearly leads. Bill.com starts at Free and IRIS KashFlow at £13.5/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Bill.com or IRIS KashFlow?: Bill.com has a free tier; the other does not. Paid plans start at Free for Bill.com and £13.5/month for IRIS KashFlow.
Does Bill.com or IRIS KashFlow run on more platforms?: Both run on Web, so platform support will not decide this one for you.
Can I use Bill.com for free?: Yes. Bill.com has a free tier, so you can try it without paying. IRIS KashFlow starts at £13.5/month.
What is Bill.com best used for?: Bill.com is most often used for invoice processing, bill payments, vendor payments, cash flow management. Of those, invoice processing and bill payments are not what IRIS KashFlow is typically brought in for.
What can Bill.com do that IRIS KashFlow cannot?: Bill.com covers AP automation, AR automation, Payment processing, Approval workflows.

Answered from the vendors’ own pages

Bill.com: What payment methods does Bill.com support?

Bill.com supports ACH transfers, checks, corporate cards, and international transfers. ACH payments cost $0.59 per transaction, checks cost $1.99, and card payments incur a 2.9% fee.

Source

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

Bill.com: Does Bill.com offer a free tier?

Yes. Bill.com offers a free Spend & Expense plan for access to credit lines from $1,000-$5M with corporate cards, budgets, and expense tracking.

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

Bill.com: Which accounting systems does Bill.com integrate with?

Bill.com integrates with QuickBooks Online, QuickBooks Enterprise, Oracle NetSuite, Sage Intacct, Microsoft Dynamics, and Xero, with automatic two-way syncing on most plans.

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

Bill.com vs IRIS KashFlow

Bill.com

IRIS KashFlow

The short version

Where they differ

What each one covers

Only in Bill.com

Only in IRIS KashFlow

What people use each for

Bill.com

IRIS KashFlow

Where each one falls short

Bill.com

IRIS KashFlow

Pricing, plan by plan

Bill.com

IRIS KashFlow

Which should you pick?

Choose Bill.com if

Choose IRIS KashFlow if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Bill.com

More on IRIS KashFlow

Keep looking

Other head to heads