How to Prepare a Consolidated Balance Sheet Step by Step: Combining a Parent and a 100%-Owned £1.8m Subsidiary

If your business has grown by buying another company, you have probably hit a wall at year end: you now hold two sets of accounts — the parent’s and the subsidiary’s — and your accountant or auditor is asking for ‘the group accounts’. Simply adding the two balance sheets together is not correct, and doing so will overstate your assets and double-count your equity. This article walks through, with real numbers, exactly how to combine a parent company and a wholly owned £1.8m subsidiary into one consolidated balance sheet that an investor, lender or HMRC-facing adviser can actually rely on.

Why you can’t just add the two balance sheets together

When a parent company buys 100% of a subsidiary, it records the purchase as an asset called ‘Investment in subsidiary’ on its own balance sheet. The subsidiary, meanwhile, still shows its own share capital and retained earnings, because legally it is a separate company with its own accounts. If you simply stack the two balance sheets on top of each other, you end up counting the same value twice: once as the parent’s investment, and again as the subsidiary’s net assets underneath it. A consolidated balance sheet strips out this duplication and shows the group as if it were one single economic entity — one set of assets, one set of liabilities, and one combined picture of equity for the shareholders of the parent.

The core adjustment: eliminating the investment against the subsidiary’s equity

The single most important step in any consolidation is what accountants call the ‘elimination of the investment’. You take the figure on the parent’s balance sheet for ‘Investment in subsidiary’ and cancel it out against the subsidiary’s own share capital and retained earnings at the date of acquisition. If the parent paid more than the subsidiary’s net assets were worth, the difference is recorded as goodwill — an intangible asset representing the premium paid for things like customer relationships, brand, or expected synergies. If the parent paid exactly the net asset value, there is no goodwill at all. Everything else — property, debtors, cash, creditors — is simply added together line by line, because those are genuine combined resources and obligations of the group.

Let’s make this concrete with a worked example. Imagine a UK trading company, Harrow Holdings Ltd, acquired 100% of the shares in Bridgewater Supplies Ltd for £2,000,000 in cash, when Bridgewater’s net assets were worth £1,800,000. Both companies have a 31 March year end, and we are preparing the group balance sheet immediately after acquisition.

Notice that Bridgewater’s total equity — share capital of £500,000 plus retained earnings of £1,300,000 — adds up to exactly £1,800,000, which is the net asset value Harrow was buying. Harrow paid £2,000,000, so there is a £200,000 gap. That gap is goodwill, and it needs to sit on the consolidated balance sheet as a separate intangible asset rather than disappearing.

Building the final consolidated balance sheet

Once the elimination entry is applied, you simply add the remaining lines together: property, plant and equipment from both companies, current assets from both companies, and liabilities from both companies. Goodwill appears as a brand-new asset line that did not exist in either company’s standalone accounts. Crucially, the equity section of the consolidated balance sheet shows only the parent company’s share capital and retained earnings — because Bridgewater’s equity has already been cancelled out in the elimination entry. This is a point that trips up a lot of finance managers preparing their first consolidation: the group’s equity is not the sum of both companies’ equity, it is the parent’s equity alone, adjusted for any post-acquisition group profits in later periods.

Check the arithmetic: total assets of £7,000,000 equal total equity plus liabilities of £7,000,000, so the consolidated balance sheet balances. Compare this to simply adding the two original balance sheets together, which would have given total assets of £8,800,000 — overstated by £1,800,000 because the subsidiary’s underlying net assets would have been double-counted. This is precisely the error that lenders, auditors and HMRC compliance reviews will flag immediately, and it is why group accounts prepared without proper consolidation are usually rejected or sent back for correction.

Under both UK GAAP (FRS 102, Sections 9 and 19) and IFRS (IFRS 3 and IFRS 10), the mechanics are essentially the same: identify the cost of the investment, compare it with the fair value of net assets acquired, record any difference as goodwill, and eliminate the investment against the subsidiary’s equity. Smaller UK groups that qualify as small under the Companies Act 2006 may be exempt from preparing consolidated accounts at all, but many still choose to produce them for management purposes, for lenders, or ahead of a future sale — so understanding the mechanics is valuable even if you are not legally required to file group accounts with Companies House.

What this means for your business

1. Always compare the cost of your investment with the subsidiary’s net assets at the date of acquisition first — the difference is your goodwill figure, and it should never be ignored or buried in another line.
2. Remember that the elimination entry lives only on the consolidation working paper, never in either company’s own statutory ledgers — do not post it into Sage, Xero or QuickBooks for either entity.
3. Check that consolidated equity reflects the parent company only (plus post-acquisition group profits in later years), not the sum of both companies’ equity — this single check catches most consolidation errors.
4. If your group has grown through acquisition, build a simple consolidation worksheet in a spreadsheet now, even if you are not legally required to file group accounts, so you are ready when a lender, investor or buyer asks for a true group picture.