Guides

Tax and finance guides for business owners

Plain-English guides from the Elm team on the tax rules, deadlines and numbers that matter to owner-managed businesses: what is changing, what it could cost you and what to do next. Start with the latest, or browse by topic below.

Latest guides

Read the latest

Newest first. We add a new guide most weeks.

12 November 2026 · Selling a business

Selling your business? Why 6 April 2027 matters

The lifetime limit for Business Asset Disposal Relief halves from £1 million to £500,000. What it could cost, the new rules on early contracts and what to check before you sell.

Selling your business? Why 6 April 2027 matters
9 November 2026 · Payroll and benefits

Payrolling company cars from April 2027

Benefits in kind move into payroll from April 2027. What employers need to do, and why July 2027 brings a double Class 1A payment.

Payrolling company cars from April 2027
4 November 2026 · Company cars

Should your company buy an electric car before 31 March 2027?

The 100% first-year allowance for new electric cars and chargepoints ends next year. The deadlines, what the change costs and how to plan the purchase.

Should your company buy an electric car before 31 March 2027?
28 October 2026 · Budget

Budget 2026: what changes for owner-managed businesses

The main measures from the Autumn Budget for company owners, directors and employers, and what to do about each of them.

Budget 2026: what changes for owner-managed businesses
Deadlines and returns

Tax deadlines and returns

What is due, when, and how to get it right.

Self Assessment deadline 31 January 2027

What to gather, how payments on account work and the penalties for filing late.

Self Assessment deadline 31 January 2027

Making Tax Digital for Income Tax

Who must use it from 2026, 2027 and 2028, how qualifying income works and the quarterly deadlines.

Making Tax Digital for Income Tax

CT600: the company tax return explained

What is filed, corporation tax rates, deadlines, penalties and common mistakes.

CT600: the company tax return explained

VAT registration threshold and how to register

When you must register, how the £90,000 rolling threshold works and which scheme to choose.

VAT registration threshold and how to register

Voluntary VAT registration: should you register early?

The reasons to register below the threshold, or wait, and what to check before you apply.

Voluntary VAT registration: should you register early?
Cash and numbers

Know where your business stands

Cash, forecasts and monthly figures you can act on.

How much cash should a business keep?

Work out fixed costs, ring-fence tax, adjust for risk and test it against a forecast.

How much cash should a business keep?

How to build a cash flow forecast

What a forecast should include, how to build one step by step and the mistakes to avoid.

How to build a cash flow forecast

How to read monthly management accounts

What to check first: cash, revenue, margin, overheads and debtors, and the questions to ask.

How to read monthly management accounts

Management accounts: what's included and why

What a monthly pack includes, how it differs from statutory accounts and when to start.

Management accounts: what's included and why

Month-end close checklist

Reconciliations, accruals, payroll and VAT checks, so you know where you stand within days.

Month-end close checklist
Choosing support

Getting the right help

When software is enough, and when it is time for more.

Do I need an accountant?

Signs it is time, what a professional adds beyond filing and the limited company deadlines.

Do I need an accountant?

Signs you've outgrown your accountant

Seven signs, from year-end-only contact to cash surprises, and what to ask for before you switch.

Signs you've outgrown your accountant

Switching accountants mid-year

How professional clearance and HMRC authorisation work, and what to hand over.

Switching accountants mid-year

Bookkeeper or accountant?

What each does, how they differ and which a growing business needs.

Bookkeeper or accountant?

What is the finance function?

What it covers, the signs you have outgrown your setup and outsourced versus in-house.

What is the finance function?

Fractional or full-time finance director?

How a fractional FD compares with a full-time hire, when each fits and what to ask.

Fractional or full-time finance director?
Founders and investment

For founders raising money

Schemes, investor expectations and the controls to put in early.

SEIS or EIS: which is right for your startup?

How the schemes differ, the 2026 limits, what investors get and which fits your stage.

SEIS or EIS: which is right for your startup?

SEIS and EIS advance assurance: how to apply

Who can apply, what HMRC asks for and what to get right first.

SEIS and EIS advance assurance: how to apply

What investors expect from your finances

The books, forecasts and records investors want to see, with a pre-raise checklist.

What investors expect from your finances

Founder finance controls and processes

Records, approvals, monthly close and investor reporting to set up early.

Founder finance controls and processes
Talk to Elm

Not sure how a change affects you?

We will look at your figures and tell you what it means for your business, in plain English.

Call 07966 795440 or email info@elmfinancial.co.uk. Our guides are general information, not advice for your circumstances.