UK SaaS founder PAYE first salary registration HMRC 2026/27: the GBP 12,570 sweet spot, the GBP 6,240 LEL anchor, and the solo-director walkthrough

A solo SaaS founder incorporates his limited company in late February 2026. He's been bootstrapping on the side, pulling in £4k MRR, and has just gone full-time. On 6 April 2026 -- the start of the new tax year -- he transfers £1,000 from the company current account to his personal account, books it in FreeAgent under "Director's salary", and gets on with shipping. Two weeks later, another £1,000. A month after that, another. By July he's drawn £4,000 of "salary" without registering as an employer, without running a single payroll cycle, without submitting a single Full Payment Submission, and without giving himself a payslip.

In November, his accountant runs the year-end. The £4,000 of "salary" gets reclassified -- partly as a director's loan (because there's no PAYE record), partly as an RTI failure that triggers a £100 late-filing penalty per missed month. The state pension qualifying year he assumed he was earning by drawing more than the Lower Earnings Limit? Not credited, because no FPS reached HMRC saying so. The corporation tax saving he assumed the salary was generating? Disallowed in part. The cleanup is six months and £900 of accountant time.

This is the most preventable founder-stage HMRC mess in the UK SaaS playbook, and it happens because solo directors confuse "I'm the only employee, surely I don't need PAYE" with the reality, which is the opposite. The moment you pay yourself anything resembling salary, you are an employer with an employee, even if both of those things are you. This post is the deep walkthrough: 2026/27 thresholds on one card, why £12,570 is the practical sweet spot, why the £6,240 LEL anchor secures your state pension qualifying year, the HMRC employer registration steps, payroll software comparison, and the four mistakes that cost founders money and pension credit. If you read last week's piece on dividends, this is the salary-side companion.

The 2026/27 numbers you need on one card

Print this. The 2026/27 tax year runs 6 April 2026 to 5 April 2027.

Item	2026/27 figure
Personal Allowance (income tax-free)	£12,570
Lower Earnings Limit (LEL -- pension qualifier)	£6,240
Secondary Threshold (employer NI starts)	£9,100
Primary Threshold (employee NI starts)	£12,570
Upper Earnings Limit (UEL)	£50,270
Employee NI rate (PT to UEL)	8%
Employee NI rate (above UEL)	2%
Employer NI rate (above ST)	13.8%
Standard tax code (single Personal Allowance)	1257L
Class 1 NIC category for over-21 director	A
Director NIC method	Annualised (alternative method available)
Corporation Tax small profits rate	19% (under £50k profit)
Employment Allowance	£10,500 (not available to single-director companies)
Late RTI filing penalty	£100 per month, plus daily after 3 months

Two figures to memorise. £6,240 is the LEL. Cross that and you bank a state pension qualifying year, even at zero NIC and zero income tax. £12,570 is the Personal Allowance, the Primary Threshold, AND the round number that anchors the optimal solo-director salary. The fact that those two are the same number in 2026/27 is what makes the workflow this clean.

Why £12,570 is the sweet spot (and £9,100 isn't)

For years, the standard accountant advice was "pay yourself just below the Secondary Threshold to avoid employer NIC entirely". In 2026/27, with the ST at £9,100, that's still defensible -- but suboptimal for most solo SaaS founders.

Item	£9,100 setup	£12,570 setup
Annual salary	£9,100	£12,570
Income tax	£0	£0
Employee NI	£0	£0
Employer NI	£0	£478
Corporation tax saved on (salary + NIC) at 19%	£1,729	£2,479
Net company benefit vs zero salary	£1,729	£2,001
State pension qualifying year?	Yes	Yes

The £12,570 setup costs the company £478 of employer NIC. In return it saves £2,479 of corporation tax (19% of the £13,048 deductible expense). Net company benefit: roughly £2,001. The £9,100 setup nets £1,729 of CT saving with no NIC offset. The difference -- about £272 a year in the company's pocket -- is small but positive, and it scales with corporation tax rate (if you're in the marginal £50k-£250k profit band, the maths gets more attractive).

The bigger argument for £12,570 isn't the £272. It's the dividend stack on top. With a £12,570 salary, your Personal Allowance is fully consumed -- every pound of dividend above that goes straight into the basic-rate dividend band and is taxed at 10.75% up to £50,270. With a £9,100 salary, you have £3,470 of unused Personal Allowance, but it's £3,470 the company has to either turn into dividend (taxed personally) or retain. Picking £12,570 lets the company expense the full Personal Allowance AND lets the dividend stack start from a known floor.

The exception: if you have other PAYE income -- a part-time job, a pension already in payment, a spouse-employer payroll -- the calculus flips. Your Personal Allowance gets used elsewhere, and a £12,570 SaaS salary stacks on top, generating real income tax. Pick a number that leaves total PAYE income at or just below £12,570 across all sources.

The £6,240 LEL anchor -- pension credit for free

The Lower Earnings Limit credits you with a Class 1 National Insurance contribution -- even when the rate of NIC payable is zero. Cross £6,240 in the year, and HMRC stamps that year as a "qualifying year" for state pension purposes.

You need 35 qualifying years for the full new state pension. That's £230.25 a week in 2026/27, roughly £11,973 a year. If you're 30 today and you spend the next 35 years drawing dividends only with no salary above the LEL, you'll hit state pension age with zero qualifying years from your SaaS business.

A salary at exactly £6,240 gives you zero income tax, zero employee NIC, zero employer NIC, and a state pension qualifying year stamped on your NI record. Free pension credit. The only cost is registering as an employer, running a payroll cycle, and submitting one FPS to HMRC.

Use £6,240 only when (a) you've already used your Personal Allowance via another PAYE source, (b) your company's distributable reserves are tight and you'd rather minimise the cash outflow on NIC, or (c) you want absolute simplicity and zero NIC payments to HMRC. Otherwise, £12,570 wins because the £478 employer NIC is paid for many times over by the corporation tax shield on the extra £3,470 of salary.

Employment Allowance -- the trap solo directors fall into

Employment Allowance is a £10,500 annual relief on employer's NIC, available to employers with more than one employee earning above the ST. Solo founders read "£10,500 of NIC relief" and assume it covers their £478 bill at £12,570 with room to spare.

It doesn't. Since April 2016, single-director companies with no other employees earning above the Secondary Threshold are explicitly excluded from Employment Allowance. The exclusion is in the National Insurance Contributions Act 2014, amended by the Finance (No.2) Act 2015. HMRC's Employer Bulletin restates it every year because founders keep claiming it and getting clawback letters.

You become eligible the moment you hire a second person who earns above £9,100 in the year. Until then, the £478 employer NIC on a £12,570 salary is real cash, paid via your monthly PAYE remittance. If your payroll software shows a "Claim Employment Allowance" tickbox, leave it unticked.

When to register PAYE -- the timing that catches founders out

You register as an employer with HMRC before the first payday, not after. The Government Gateway employer registration takes about 10 minutes online but HMRC's own guidance asks for up to 2 weeks of lead time before your first payday so they can issue your PAYE reference and Accounts Office reference in time for your first FPS.

• Register at least 2 weeks before the first payday.
• HMRC posts your PAYE reference (3 digits + alphanumeric, e.g. 123/AB45678) and Accounts Office reference (13 characters, e.g. 123PA00012345) to your registered office.
• You enter both into your payroll software before running the first FPS.
• You cannot run the first FPS without those references -- the submission will fail.

If you've already paid yourself before registering, treat the early payments as a director's loan, register PAYE immediately, and run your first proper salary through payroll once registered. Document the loan in your accounting software. Repay it within 9 months of your accounting period end to avoid s455 corporation tax at 35.75% -- see the dividends post for the full s455 mechanics.

The HMRC registration journey takes 10 minutes: sign in to HMRC online services with your Government Gateway credentials, select "Register as an employer", choose "Limited company", enter the Companies House registration number and registered office, choose PAYE only (skip CIS unless you're in construction), give the expected first payday and headcount (1, in our case), submit. Confirmation email lands within minutes. The PAYE reference arrives by post within 5 working days.

RTI, FPS, EPS -- the three letters every founder needs

Real Time Information (RTI) is HMRC's payroll reporting framework. There are two submission types you actually care about:

FPS -- Full Payment Submission. Sent on or before each payday. Includes who got paid, how much, the income tax deducted, the NICs, the YTD figures. This is the document that puts the qualifying year on your NI record.

EPS -- Employer Payment Summary. Sent in months when no payment is being made (a "nil" month) or when you need to claim Employment Allowance. For most solo founders, you'll send an EPS in any month you don't run a salary.

The minimum cadence for a solo SaaS company:

Salary cadence	FPS submissions	EPS submissions
Annual (one lump in March)	1	11
Monthly	12	0
Quarterly	4	8

Skipping the EPS in nil months triggers HMRC's "expected FPS not received" flags and £100/month late penalties. Most modern software handles the EPS in one click.

Year-end obligations: a P60 to yourself by 31 May (auto-generated by payroll software), and a P11D only if you've provided benefits-in-kind. Most solo founders avoid BIKs to keep this clean. If you have a director's loan above £10k average, you'll need a P11D for the BIK on the loan.

Director NICs -- the annualised method matters

Directors are special for NIC purposes. Where a normal employee's NIC is calculated per pay period, a director's NIC is calculated on an annual basis -- the standard "director method" or "annualised method".

The reason directors get this treatment is to stop arbitrage: drawing zero salary for 11 months, then a £150,000 lump sum in March, and claiming only one month of NIC bands applies. Annualisation forces the full year of pay to be tested against the annual thresholds, regardless of when within the year it was paid.

When you add yourself as an employee in BrightPay/Xero/FreeAgent, set the NIC method to "Annual basis (Standard)". Don't skip this -- if you set up as a non-director and run NIC monthly, HMRC may issue a coding adjustment and your year-end true-up fails.

Payroll software comparison -- what solo founders use

You don't need to spend more than £0-£10 a month on payroll for a single-director SaaS company.

Tool	Price (1-3 employees)	RTI	Director NIC	Notes
BrightPay	Free	Yes	Yes	UK + Ireland focus, desktop app for Mac/Windows. The default for indie SaaS founders.
Xero Payroll	£5/payslip add-on	Yes	Yes	Best if already on Xero. Tightly integrated with bookkeeping.
FreeAgent Payroll	Free with FreeAgent	Yes	Yes	Free with NatWest/RBS/Mettle/Royal Bank business account. Lowest friction.
Crunch Payroll	Included in £69-99/mo bundle	Yes	Yes	Outsourced. Good if you want hands-off and you're paying for the accountancy too.
Pandle Payroll	Free (basic)	Yes	Yes	UK-built, MTD-ready. Less polished than BrightPay but free.

Default recommendation: BrightPay if you want desktop control and zero spend; FreeAgent Payroll if your bank routes you to FreeAgent already. Both handle the director NIC method, both submit RTI cleanly, both produce a P60 at year-end.

Worked example -- Maya's first year on PAYE

Maya incorporates Aprilstack Ltd on 15 February 2026. Solo founder, no other PAYE income, no other employees. First payday 30 April 2026.

Registration timeline:

• 15 Feb 2026: Company incorporated at Companies House (£50 online fee).
• 17 Feb 2026: Bank account opened with NatWest (routes to FreeAgent free).
• 20 Feb 2026: Maya logs into the Government Gateway, registers as an employer.
• 25 Feb 2026: HMRC posts the PAYE reference (123/AB45678) and Accounts Office reference (123PA00012345).
• 1 Apr 2026: Maya downloads BrightPay, configures herself as a director with annual NIC method.
• 6 Apr 2026: 2026/27 tax year begins. Annual salary set to £12,570.
• 30 Apr 2026: First payday. BrightPay calculates £1,047.50 gross, £0 income tax, £0 employee NI, £39.83 employer NI. Maya transfers £1,047.50 from the company account to her personal account. Submits the FPS to HMRC.
• 22 May 2026: First PAYE remittance to HMRC: £39.83 (employer NI only).

Year-end position (5 April 2027):

Item	Amount
Total salary paid	£12,570
Income tax / employee NI deducted	£0
Employer NI paid	£478
Corporation tax saved on (salary + NIC) at 19%	£2,479
Net company benefit	£2,001
State pension qualifying year credited	Yes

Personal tax position for 2026/27:

Maya also drew £30,000 of dividends across the year, with board minutes, vouchers, and the distributable reserves test passed (see the dividends deep-dive).

Component	Amount
Salary	£12,570
Dividend received	£30,000
Personal Allowance used by salary	£12,570
Dividend allowance (zero-rate)	£500
Taxable dividend	£29,500
Basic rate dividend tax (£29,500 x 10.75%)	£3,171
Total personal tax	£3,171

Net take-home: £42,570 - £3,171 = £39,399 in Maya's hand. Plus a state pension qualifying year locked in. Plus £2,001 of net company benefit on the corporation tax side. The full PAYE setup -- register, run 12 FPSs, year-end P60 -- took about 4 hours of admin across the year. Roughly 20 minutes a month.

4 mistakes UK SaaS founders make

Mistake 1 -- Paying salary before registering PAYE

Symptoms: cash transfers from company to personal in April/May, no FPS, no PAYE reference yet. Cost: £100/month late RTI penalty, daily penalties after 3 months, salary potentially reclassified as a director's loan, state pension qualifying year not credited.

Fix: register at least 2 weeks before the first payday. If you've already paid yourself, treat it as a director's loan and run your first proper salary through payroll once your references arrive.

Mistake 2 -- Claiming Employment Allowance as a single-director company

Symptoms: BrightPay or Xero Payroll has a "Claim Employment Allowance" tickbox; you ticked it; your employer NIC bill came out as £0 instead of £478. Cost: HMRC clawback within the tax year, plus interest on the unpaid NIC.

Fix: leave the tickbox unticked. You become eligible only when you have a second employee earning above the Secondary Threshold.

Mistake 3 -- Setting up the employee record without director NIC method

Symptoms: payroll software calculates NIC on a monthly basis instead of annualised. Year-end FPS shows a true-up that surprises you. If you took a lump sum bonus mid-year, the maths is wrong and HMRC issues a coding adjustment.

Fix: when adding yourself as an employee, set the NIC method to "Annual basis (Standard)". This is a one-checkbox setting in BrightPay/Xero/FreeAgent's new-employee wizard. Don't skip it.

Mistake 4 -- Skipping the EPS in nil-payment months

Symptoms: you decide to pay yourself a single annual salary in March, run one FPS, and forget the other 11 months. HMRC's RTI system flags 11 months of "expected FPS not received" and starts issuing reminder letters and £100/month late-filing penalties.

Fix: in any month you don't pay a salary, submit a "nil" Employer Payment Summary instead. BrightPay/Xero/FreeAgent all have a one-click "Submit nil EPS for this month" option. 30 seconds.

The 30-minute PAYE ship-it

The whole thing -- register, set up software, run your first FPS -- fits in half an hour once your HMRC references are in hand. Run it the week you incorporate, before your first payday.

Step 1 -- Register as an employer (10 min). Government Gateway -> "Register as an employer". Enter Companies House number, registered office, expected first payday, employee count (1). Submit. Confirmation email within minutes. Wait 5 working days for the references to arrive by post.

Step 2 -- Choose payroll software (5 min). BrightPay if you want free desktop control, FreeAgent Payroll if you bank with NatWest/RBS/Mettle/Royal Bank, Xero Payroll if you're already on Xero. Download / log in.

Step 3 -- Set up the employer record (5 min). Enter the PAYE reference, Accounts Office reference, year-end date (5 April 2027), first payday.

Step 4 -- Set up yourself as employee (5 min). Name, NI number, date of birth, address, tax code 1257L, NIC category A (or M if under 21), director method "Annual basis", annual salary £12,570 (or £6,240 for the LEL anchor).

Step 5 -- Run the first payroll cycle (3 min). Hit "Run payroll". Software calculates the deductions. Submit FPS to HMRC. Confirmation receipt within seconds.

Step 6 -- Pay yourself (1 min). Transfer £1,047.50 from company to personal. Reference: "Salary YYYY-MM".

Step 7 -- Pay HMRC by the 22nd of the following month (1 min). PAYE liability paid via the Accounts Office reference using the company bank account. For a £12,570 setup, this is roughly £40/month of employer NI. Save the reference for repeat payments.

Step 8 -- Schedule monthly run + nil EPS for skip months (1 min). Calendar reminder for the 25th of the month -- "run payroll, submit FPS or nil EPS".

Done. 30 minutes of setup, 5-10 minutes a month thereafter. State pension qualifying year secured, £2,000 of net corporation tax benefit, HMRC employer record clean for the next 6 years of compliance window.

If your stack today is "salary by gut feel, no registration, no payroll software" -- replace it this weekend. The whole loop is 30 minutes and the downside of getting it wrong is months of cleanup. See also this week's free report on the AI Construction Retentions Compliance Tracker for a UK-specific build idea where the same compliance-clarity instinct turns into a real product opportunity.

Key takeaways

• For a solo director with no other PAYE income, set the annual salary at GBP 12,570. Personal Allowance is fully used, employer NI of GBP 478 saves GBP 2,001 net via corporation tax relief at 19%, and a state pension qualifying year is secured.
• The GBP 6,240 LEL anchor is the floor that earns you a state pension qualifying year at zero NIC and zero income tax. Cross it once a year and the year is stamped on your NI record. You need 35 qualifying years for the full new state pension.
• Employment Allowance does NOT apply to single-director companies with no other employees above the Secondary Threshold. Excluded since April 2016. Leave the tickbox unticked in your payroll software until you genuinely hire a second person.
• Register as an employer with HMRC at least 2 weeks before your first payday. The Government Gateway journey takes 10 minutes. HMRC posts your PAYE reference and Accounts Office reference within 5 working days. You cannot run the first FPS without both references.
• Submit a Full Payment Submission on or before each payday, and a nil Employer Payment Summary in any month you do not run a salary. Skipping the EPS triggers a GBP 100/month late-filing penalty per missed month. BrightPay and FreeAgent Payroll are free for solo directors and handle both submission types automatically.

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This week's free report: AI Construction Retentions Compliance Tracker

Score: 7.9/10 -- read the full breakdown

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