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Bank reconciliation. The complete guide

Written byKarishma 1 (1)Karishma Thapa MagarKarishma 1 (1)Karishma Thapa MagarWritten byKarishma Thapa Magar is an ACCA Finalist with experience providing UK accountancy and taxation solutions to clients. She brings strong analytical and problem-solving skills to the table and is able to advise landlord and sole trader clients on the upcoming MTD requirements.View profile
Published on: 25 Aug 2026Updated on: 25 Aug 20262 min read
Bank reconciliation. The complete guide

Reconciliation means every transaction in your bank account has been explained: reconciled against an invoice or bill, categorised as income or an expense, recorded as a transfer, or marked personal. Once a period is reconciled, the figures in your reports are the figures in your bank, and a quarterly update becomes a review rather than an investigation.

The loop

  1. Bring it in. Transactions arrive from a bank feed, or you import a statement.

  2. Let the rules run. Anything your bank rules recognise is sorted and offered for confirmation.

  3. Work the queue. Everything else sits in To reconcile, and you tell RentalBux what each one was.

  4. Close. With nothing unexplained left, the difference between bank and book is £0.00.

The Two Sums On Every Account Card

Each account shows its own arithmetic, so you can see where a gap comes from.

Sum

What it tells you

Opening + Money received − Money spent = Bank statement

What the bank says you have

Bank statement − RentalBux book = Difference

How much is still unexplained

Difference reaching £0.00 shown as In sync is what “reconciled” looks like.

The Four Ways To Explain A Transaction

Tab

Use it when

Result

Find & reconcile

There is an invoice or bill behind it

The bank line and the document are linked and both close

Categorise

There is no document a card payment, a bank charge

Income or expense recorded against a category and property

Transfer

Money moved between your own accounts, or to a co-owner

Recorded, and kept out of income and expenses

Notes

You need to remember something about it

A private note; the transaction still needs one of the three above

A Sensible Order

  • Rent first. It is the largest and most repetitive, and it clears most of the queue

  • Then known suppliers; mortgage, insurance, utilities, the letting agent

  • Then transfers between your own accounts and payments to co-owners, which are neither income nor expense

  • Then one-offs, which are the ones that need thought

The Tabs Across The Transaction List

To reconcile · Reconciled · Transferred · Personal. The counts are the honest picture of where an account stands. Anything reconciled can be reverted: the transaction moves back to To reconcile and any link to an invoice or bill is released.

How Often

Monthly is enough for most portfolios and takes minutes once rules are doing the repetitive work. Leaving it to the end of a quarter turns a ten-minute job into an afternoon, because by then you have forgotten what a payment was for.

What “Done” Looks Like

  • Nothing left in To reconcile for the period

  • Difference showing In sync on every account

  • Every rent line either reconciled or showing as arrears on purpose

  • Transfers recorded as transfers, not as income at one end and an expense at the other

Check first

Do not park unexplained items in a general category to clear the queue. It produces a reconciled-looking period with a figure nobody can trace, which is exactly the problem the figures were meant to solve.

Note: Reconcile before you file, not after. The pre-submission checks in MTD Tax look at exactly this.

What The Word Means

Reconciling sounds technical and is not. It means going through the money that moved and saying what each item was. When there is nothing left to say, the account is reconciled.

Worked Example

A five-property portfolio, one business account, a month’s worth of activity: 23 transactions. Rules sort 14 of them — mortgage, council tax, two agent deposits, the energy supplier. Rent for three properties matches the open invoices. That leaves six: a builders’ merchant card payment to categorise, a transfer to savings, a payment to a co-owner, two small bank charges to split across properties, and one payment nobody recognises. The whole month is about eight minutes, and the last one is the only one that needs thought.

Why The Difference Figure Matters

Bank statement − RentalBux book = Difference is the single number that tells you whether your reports can be trusted. A difference of £0.00 means every pound the bank saw has been explained. Any other number means your income statement and your bank disagree, and the return you file from it will inherit the gap.

Doing It Monthly

The work is the same size whenever you do it; only your memory changes. A payment from three days ago is obvious. The same payment in January, three months later, is a small research project.

What To Do With The One You Cannot Identify

Leave it. An honest unmatched transaction is better than a wrong category, and it is a short list to take to the bank or the tenant. Parking it in “other expense” to clear the queue is how a figure nobody can explain gets into a return.

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