Why MTD for Income Tax breaks your pricing model | Sage Advice UK

You’re not pricing the wrong clients. But you might be pricing the wrong thing. 

MTD for Income Tax didn’t add four submissions. It changed what you’re responsible for.  

In rooms full of accountants and bookkeepers, the concern isn’t the software. It’s the conversation. 

“How do I charge for this without losing clients?” 

Here’s what we’ll cover:

The MTD myth

“It’s just pressing a button.” 

Quarterly updates. A submission. A click. 

From the outside, that’s all MTD looks like. 

So, the price uplift feels tiny. 

But what changed isn’t the button—it’s everything behind it. 

The visibility gap 

Clients see submissions. You carry responsibility. 

Clients see: 

• A deadline 
• A number 
• A confirmation 

What you actually carry: 

• Chasing missing records 
• Cleaning incomplete data 
• Reviewing inconsistent categorisation 
• Ongoing liability 

The client sees a submission. You carry the risk if it’s wrong. 

Your pricing problem lives inside that gap.  

What clients see	What you carry
Submissions	Chasing
Buttons	Clean-up
Deadlines	Review risk
Admin	Ongoing responsibility

“It takes quite a lot longer to do a bridging submission, because you’ve got to relay all the boxes.” 

Rebecca Benneyworth,
Tax consultant and MTD Working Group member, ICAEW MTD Live 

The behaviour layer 

The real cost driver isn’t submissions. It’s behaviour. 

Under MTD for Income Tax, the cost depends on: 

• How clean the records are
• How quickly information arrives 
• How often corrections are needed 
• How engaged the client is 

Two clients. Same turnover. Same four updates.  

• One sends a tidy spreadsheet. 
• One sends 47 untagged transactions and a photo of a shoebox. 

Same revenue. Four times the work.  

Same fee?  

The responsibility shift 

The work no longer has a finish line. 

Before MTD, work felt episodic: 
Prepare → File → Close → Reset. 

Under MTD for Income Tax: 

• Records are rarely complete 
• Oversight is continuous 
• Risk doesn’t disappear at submission 
• Handover mid-year is messy 

Responsibility doesn’t reset. It rolls forward.  

You can’t opt out of the MTD shift. You can only decide whether it’s priced properly. 

That’s the structural change. 

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“That filing is a responsibility. It’s a deadline that we’ve got to work to. If clients don’t deliver, that changes everything.”

Rebecca Benneyworth,
Tax consultant and MTD Working Group member, ICAEW MTD Live

The model underneath the shift 

This is a Continuous Responsibility Model: a structural shift from episodic compliance to ongoing exposure shaped by client behaviour.  

It’s not a pricing tweak. It’s a different economic unit. 

And the economic unit you’re pricing is no longer a submission. It’s exposure. 

Why pricing breaks 

If you price only the visible layer (“four updates”, “just a button”, “admin uplift”), you miss: 

• Behaviour variability 
• Continuous review 
• Ongoing risk 

And that’s how margin leaks—one invisible hour at a time. 

When capacity is already tight, those invisible hours could reduce profit. And even crowd out new work. 

The decision 

If you price submissions, you’re betting on perfect client behaviour. 

If you price responsibility, you’re pricing reality. 

You can price MTD as: 

Or you can price it as: 

• Continuous responsibility shaped by client behaviour 

Only one protects your margin when behaviour changes. 

 What this means in practice 

MTD won’t break your pricing because you undercharge. 

It’ll break because the economic model has changed. 

If responsibility is continuous, then pricing must be too 

For example: 

• Tier pricing based on behavioural quality 
• Monthly retainers rather than annual bursts 
• Explicit responsibility clauses in engagement letters 
• Behaviour-linked pricing reviews 

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Hannah Miller, director of Chipperfield Accounting, described requiring clients to deliver data within 14 days of quarter end as a condition of monthly billing—making the fee structure a two-way commitment rather than a unilateral charge.  

ICAEW MTD Live

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This isn’t theoretical. Practices are already pricing using a Continuous Responsibility Model—they just haven’t had a name for it. 

Diagnostic questions, client conversation frameworks, and pricing structures that reflect ongoing exposure rather than submission volume are fully developed here.