Self-assessment, finally on autopilot

Know exactly what you owe HMRC — all year round.

earn it, log it, sorted.

Suma tracks your income and expenses, scans receipts, logs mileage and shows your live tax bill — then hands you a clean export for your Self Assessment, or files straight to HMRC if you're on Making Tax Digital.

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JMTPAR
500+ sole traders already waiting
Self-Assessment & MTD Ready
Export for your January return, or HMRC-recognised filing for the 2026 rollout
Bank-grade encryption
Annual returns & quarterly submissions
UK-based support
Why Suma

Tax season shouldn't be a shoebox of receipts and a sleepless January.

Most sole traders fly blind all year, then panic at the deadline. Suma turns the whole thing into something you barely think about.

the old way
Spreadsheets, guesswork, and a frantic scramble every January to work out what you owe.
with Suma
Your tax bill updates itself every time money moves. You always know where you stand.
come deadline
One tap to file. Everything's already sorted, categorised and HMRC-ready.
How it works

Three steps, then forget about it

step one

Capture as you go

Snap a receipt, log a trip, send an invoice. Or just talk — Suma sorts it into the right category.

step two

Watch it add up

Your live tax estimate updates instantly — with every working shown step by step. No nasty surprises.

step three

File in one tap

Download your Self Assessment numbers for the January return, or file quarterly updates straight to HMRC — fully Making Tax Digital ready.

Everything in one place

A whole accountant's worth of tools,
in your pocket

Suma home screen showing live tax owed, money in and out, and your to-dos
Home dashboard

The whole picture, the moment you open it.

Your home screen leads with your live tax bill and the days left to file, then money in, out and profit — plus a short list of anything that needs a tap. No digging, no surprises.

Live tax owed, updated as money moves
Money in, out and profit at a glance
A quick 'needs you' list you clear in seconds
Smart capture

Snap a receipt. It's already filed.

Point your camera and Suma reads the merchant, amount, date and VAT — then picks the right expense category for you. No typing, no shoebox.

Reads totals, VAT and dates automatically
Suggests the correct expense category
Stores the image for your records
RAILWAY CAFÉ
Flat white£3.40
Client lunch£34.00
VAT£5.20
TOTAL£42.60
Reading receipt…
snap & it's sorted ✦
MerchantRailway Café
Amount£42.60
CategoryMeals & entertainment
Your workings
Annual forecast
Year to date
Estimated tax liability
£4,820
no nasty
surprises
Show your workingstep by step
Taxable profit£24,100
Personal allowance−£12,570
Income tax (20%)£2,306
Class 4 NIC£1,034
Live tax estimate

See every penny of your bill — and how it's worked out.

No black box. Suma shows the full calculation, line by line: profit, allowances, income tax and National Insurance. Switch between an annual forecast and year-to-date in a tap.

Income tax & Class 2/4 NIC, always current
Set money aside before the bill lands
Mileage tracking

Every business mile, claimed automatically.

Drive to a job and Suma logs the route, distance and the exact HMRC mileage rate. Those small trips add up to a real deduction — don't leave it on the table.

Applies the 45p / 25p HMRC rates for you
Saves the route as evidence
Recording trip08:24
This trip · Studio → client site
12.4 mi
that's tax back
£5.58
Today · 3 trips31.2 mi
This tax year£612 claimed
Invoices+ New
Outstanding
£2,890
chase the overdue one →
AL
Atelier Lane
Paid · 14 May
£1,200
PAID
TH
Tom Hartley
7 days overdue
£980
OVERDUE
BD
Bridge & Co
Due Fri 22 May
£710
OPEN
RP
Riley Park
Due Wed 27 May
£540
OPEN
Invoicing

Send invoices, get paid, stay on top of it.

Build a clean invoice in seconds and Suma watches what comes back. See paid, open and overdue at a glance — and nudge the latecomers with one tap. Every payment flows straight into your tax picture.

Automatic payment reminders
Income syncs into your live tax bill
Self Assessment & MTD

Filing day, sorted — your way.

Doing a standard Self Assessment? Suma gives you a clean, categorised export of your numbers for the January return — already checked and reconciled. On Making Tax Digital? Submit your quarterly updates and final declaration straight to HMRC. Either way, the scramble is over.

Easy export for your January Self Assessment
Or submit quarterly direct to HMRC for MTD
Deadline reminders so nothing slips
QUARTER 1 · APR–JUN
Ready to submit
Quarterly update
All checked
one tap & done
Income£9,310
Expenses£3,640
Reconciled100%
Submit to HMRC →
Good to know

Questions, answered

Making Tax Digital (MTD) is HMRC's shift to digital record-keeping and quarterly updates for the self-employed. From the 2026 rollout, many sole traders will need compatible software — Suma is built for exactly that. Not on MTD yet? No problem — you can still use Suma to track everything and export your numbers for the traditional January Self Assessment.
be first in line

Get Suma before everyone else

Join the waitlist and we'll let you in early — plus a founding-member perk when we launch late 2026.

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