Managing Multiple Rentals in Excel — Where It Breaks and When to Switch to a System

Almost every private landlord starts with Excel. And rightly so — for a single flat it's perfectly enough. But as the number of flats grows, the same spreadsheet that used to help becomes a drag. This article lists the concrete signs that it's time to switch to a system.

Where Excel breaks

1. Utility calculations repeat every month. Each month you manually enter readings, multiply by the tariff, allocate shared costs. With one flat — 10 minutes. With five — half of your Saturday.

2. Tariffs change, formulas don't. Ignitis changed its price? You have to update formulas across every file and remember that old bills must keep the old tariff. One mistake in a formula and all the bills are wrong.

3. Chasing readings. Excel doesn't talk to the tenant. You still collect readings over messages and then retype them. Retyping is where mistakes live.

4. No view of who paid. Tracking payments in Excel turns into a separate sheet you have to keep updating by hand. Debt gets noticed too late.

5. No history, no evidence. When a dispute over a reading or a bill comes up, it's hard to prove what was declared and when.

Five signs it's time to change

• You have 3 or more rented flats.
• Preparing bills takes more than an hour a month.
• You've made a mistake calculating utilities at least once.
• Tenants ask where the amount came from.
• You've forgotten a lease end date or a reading deadline.

If you recognize at least three — Excel is already costing you more than a system would.

What to look for in a system

Not every "rental app" suits a private landlord. Look for these things:

1. Automatic invoicing — rent + utilities calculated and sent without manual work.
2. Reading collection from the tenant — no accounts, so the tenant actually submits.
3. Tariff history — so old bills don't change when the price does.
4. Payment tracking — who paid, who's late, in real time.
5. Local context — GPM (personal income tax), kontus.lt or other accounting integration.

Switching doesn't have to be painful

Many people put it off because they fear a "migration." In reality you can start with one flat: enter the property, the tenant, the meters — and next month the bill generates itself. You move the remaining flats over gradually.

Rivio is built for exactly this: a private landlord with 1–10 flats, in Lithuanian, with automatic utility calculation and kontus.lt integration. Your first flat — free, no credit card.