Pricing MTD ITSA quarterly returns — the firm fee-model playbook.
How to price the 5× MTD ITSA filing-volume increase from April 2026 without margin compression. Worked-example fee models for 50/100/250 client firms, the engagement-letter wording, the client-comms script, and how to decide between raising fees, automating workflow, or doing both.
The short answer
Most firms should move to per-quarter pricing (£40–£100/update for landlords, depending on complexity) plus a separate Final Declaration fee.That typically produces an annual total 80–120% higher than the old Self Assessment fee for the same client, which is defensible because HMRC has mandated five filings instead of one. The firms that automate receipt-to-filing well (via Smart Inbox, bookkeeper-in-the-loop) can price 20–30% below the rest-of-market and still preserve margin.
1. The volume shift, restated
Under MTD ITSA from 6 April 2026, every affected client generates five returns per year instead of one:
- Q1 quarterly update (5 August deadline)
- Q2 quarterly update (5 November)
- Q3 quarterly update (5 February)
- Q4 quarterly update (5 May)
- Final Declaration (31 January following year-end)
For a typical Cohort A landlord-heavy firm with 50 affected clients, that’s 250 new filings per year on top of the existing Self Assessment book. Without automation, every filing is a partner/bookkeeper-hour-equivalent event. Without fee adjustment, the firm absorbs the cost. Both reasons the fee model must change.
2. The three honest fee-model options
For any affected client, the firm has three choices:
- Raise fees — price each filing separately, capture the new revenue, accept that some clients will leave.
- Automate the workflow — reduce per-filing labour cost enough that the same total fee covers the work. SmartBooks bets on this.
- Accept margin compression — same fees, more work, lower margin per hour. Rarely the right call for a sustainable practice.
Most firms end up doing some blend of (1) and (2). The right blend depends on the firm’s software stack, client mix, and partner capacity. The worked examples below assume a moderate blend — some fee uplift, some automation gain.
3. Worked example — a 50-client firm
Imagine a landlord-heavy firm with 50 Cohort A clients (in scope April 2026), each paying £250/year for Self Assessment today. Current annual revenue from this cohort: £12,500.
Under MTD ITSA from April 2026:
The standard model (~£490/client/year) is the most common landing point. The premium model requires either complex clients (HMOs, commercial property, multiple income sources) or a firm with strong brand authority. The modest-uplift model only works if the firm has materially automated the workflow.
4. Worked example — 100 and 250 client firms
Same analysis at higher client counts. The non-linear insight is that the partner/bookkeeper hour costs scale roughly linearly, so the fee uplift required is proportional to client count, not exponential.
That additional revenue covers a partial FTE plus the software stack at every realistic firm size. The fee model works.
5. Pricing by client complexity tier
A blanket per-quarter fee is too crude beyond a small book. For 50+ clients, three tiers usually work:
Final Declaration fees follow a similar tiered structure (£150 / £250 / £400+). The tiering protects against undercharging complex clients while keeping simple ones competitive.
6. The autumn 2025 client conversation
Don’t do this by email. Schedule a 30-minute call with every Cohort A client. The script:
- State the change (5 minutes). HMRC has mandated quarterly filing for landlords above £50k from April 2026. Five returns instead of one.
- Explain what it means for them (5 minutes). Quarterly cadence, digital records, the Final Declaration replacing year-end SA, the £200 penalty per missed return.
- State the new fee model (5 minutes). Be specific. “You’re Tier 2; your fees will be £60/quarter plus £250 Final Declaration, £490/year total — up from £250 today.” Don’t apologise for it.
- Explain what you’re doing to make it easier (5 minutes). The software you’re using, what you’ll do, what you need from them.
- Handle objections honestly (10 minutes). “Cheap software” framing — address it head-on per the FAQ. Volume-model competitor framing — acknowledge they exist and let the client decide.
At the end of the call, follow up with a written engagement-letter variation. Have it pre-drafted before the calls start.
7. Engagement-letter variation — what to include
- Scope — quarterly updates + Final Declaration replacing annual SA.
- Cadence — you will prepare and submit each quarterly update no later than X working days before the HMRC deadline, conditional on receiving complete records by Y working days before.
- Client responsibility — data uploaded to the chosen software (Smart Inbox / Dext / direct bank feed) within the agreed cadence. Late data → late filing → client’s penalty exposure, not the firm’s.
- Fees — per filing, with the complexity tier stated. Invoiced quarterly, on completion of the relevant update.
- Software — the firm’s required software (SmartBooks, Xero, QBO, etc.) and who pays the subscription.
- Liability — firm liability limited to fees received in the past 12 months, subject to non-excludable items.
- Cancellation — 30 days’ notice on either side, with the firm completing in-flight filings on a pro-rata fee basis.
Have the variation reviewed by your professional body or a suitably qualified solicitor before issuing — ICAEW, ACCA and AAT will all publish suggested wording in 2025.
8. How much to automate vs how much to raise fees
The honest answer depends on three things:
- Your current per-SA time cost. If you’re already at 2+ hours per Self Assessment because of receipt chaos, automation is high-leverage — you can cut the per-quarter time materially.
- Your client base’s software willingness. Clients who’ll happily use Smart Inbox / WhatsApp capture / a mobile app reduce your time cost. Clients who insist on emailing PDFs at year-end reduce automation leverage.
- Your competitive context. Firms in price-competitive markets (urban, lots of competitors) lean automation-heavy. Firms with strong brand authority and a captive book lean fee-raise-heavy.
Most realistic firm strategies will be 50–70% fee uplift + 30–50% automation gain — both, in different proportions.
9. Where SmartBooks fits in the pricing maths
SmartBooks automates the receipt-to-filing loop in a way that materially reduces per-quarterly-update labour time. For a typical Tier 2 landlord client:
- Manual workflow: ~1.5 hours per quarterly update (receipt collection, classification, review, draft, send to client for approval, submit).
- SmartBooks workflow: ~25 minutes per quarterly update (Smart Inbox auto-classified, bookkeeper-approves, submit).
The time saving means firms using SmartBooks can charge 20–30% below marketfor the quarterly update and still preserve gross margin per hour. That’s the SmartBooks bet for firms: lower fees to clients, higher margin per filing, more client-base retention through cohort B and cohort C waves.
SmartBooks is currently sandbox-tested with HMRC; production API credentials are with HMRC for review. Status: /security. If the pricing maths above appeal, book a 15-minute demo — we’ll walk through your Cohort A count and the automation gains against your actual book.
Related guides
- MTD ITSA April 2026 — what it means for firms (parent guide)
- MTD ITSA for landlords — the April 2026 mandate (client-side companion)
- Best MTD VAT software 2026 — picked by use case
- For accountancy and bookkeeping firms
FAQ
What's the single most common pricing mistake firms make on MTD ITSA?
Pricing the new quarterly cadence at the same total annual fee as the old Self Assessment. A landlord that used to pay £250/year for one return now generates five filings (four quarterly + one Final Declaration). At the same total fee, the per-filing margin collapses. The right move is to price per quarter (typically £40–£80) plus a Final Declaration fee — usually netting an annual total 80–120% higher than the old SA fee, which the client accepts because the workload has genuinely changed.
Should I price per filing, per quarter, or as an annual retainer?
Per quarter, with the Final Declaration as a separate line. Per-filing pricing makes clients aware of every interaction (good for boundary-setting). Per-annual-retainer hides the cost increase and creates churn risk. Per-quarter is the cleanest model for both sides — five line items per year per client, predictable revenue, easy to compare across the book.
How much should I charge per quarterly update for a landlord?
Depends on portfolio complexity and how much of the work the client does. A landlord with 1–3 simple properties who uses good software to capture receipts: £40–60 per quarter. 4–10 properties with joint ownership or mixed letting structures: £60–100. Commercial property or HMOs: £100+. The Final Declaration adds £150–300 on top depending on complexity. Compare to your current Self Assessment fee and see whether the multiplier (≥1.8×) makes sense for the workload.
Won't clients leave if I raise fees?
Some will — that's reality. But the realistic alternative is to absorb the cost increase and watch margin compress across the book. The framing matters: this isn't a fee increase from the firm, it's HMRC mandating five filings instead of one. Most clients accept that. The ones who don't are usually low-value engagements that you'd rationally refer to a volume-model competitor anyway. Expect 3–8% churn on the affected book; the higher-fee model on the remaining clients more than offsets it.
What about clients who say 'just use cheap software, surely it's simple'?
Two answers, depending on the client. (1) The honest answer for a landlord with one simple property: you might be right, FreeAgent + DIY filing might work for you. We can prepare you to do it yourself with a one-off session and you can come back at year-end. (2) For multi-property, joint ownership, or any complexity: software helps but it doesn't eliminate the partner/bookkeeper time — the work that matters is the review and approval before submission. That's not labour you can software away. Most clients pick option 2 when it's framed honestly.
When should I have the fee conversation?
Autumn 2025 for Cohort A (clients in scope from April 2026). Schedule explicit 30-minute calls — don't do it by email. Frame it as 'HMRC has made a change to your filing requirements, here's what it means for you and what we're charging for the new work'. The pre-mandate window gives clients time to budget and gives you time to handle objections. Doing this in April 2026 when the first quarter is already running is a much worse conversation.
Do I need to update my engagement letter?
Yes. Existing engagement letters typically cover 'annual Self Assessment' — the quarterly cadence is materially different scope. ICAEW / ACCA / AAT will publish suggested wording for MTD ITSA engagement variations; have your draft reviewed by your professional body if you're uncertain. The variation should cover: new filing cadence, new fees per filing type, your liability scope for late/inaccurate filing, the client's responsibility to get data in on time, and the cancellation terms if the relationship changes.
How does SmartBooks change the pricing maths?
SmartBooks reduces the per-quarterly-update labour cost by automating the receipt-capture / classification / review-queue / approval flow. For a typical landlord quarterly update, this can reduce partner/bookkeeper time from ~1.5 hours to ~25 minutes — provided the client uses the Smart Inbox properly. That means you can charge less per quarter than firms still doing it manually, while preserving margin. Firms using SmartBooks typically price quarterly updates 20–30% below the rest-of-market and still see better unit economics.
A note on advice
This guide is general operational and commercial guidance on the MTD ITSA fee-model decision. It is not regulatory or tax advice for a specific firm. UK firms should consult their professional body (ICAEW, ACCA, AAT) for institute- specific guidance on engagement-letter wording, complaints handling, and the duty-of-care obligations around the new filing cadence.
Run the maths against your actual book.
Book a 15-minute demo if you're running a firm — we'll walk through your Cohort A count, the complexity-tier mix, and the SmartBooks automation gains against your real numbers.
Running a firm? Book a 15-minute demo.