Plan the bills that don’t come every month
Insurance, property tax, registration, the holidays — the bills that hurt are the lumpy ones that ambush a single month. BillMapper maps your whole year, flags the month that spikes, and tells you what to set aside so none of it blindsides you. No sign-up, and everything runs in your browser.
Tools
Guides
Plain-language money planning — the sinking-fund method, worst-month math and the annual bills worth mapping, each paired with a tool.
When Every Big Bill Lands in the Same Month: How to Spread the Damage
How to budget when all your bills hit the same month: see the pile-up, then move due dates, split across paychecks, or pre-fund — with worked numbers.
Budget for Your Worst Month, Not Your Average One
Why budgeting your irregular expenses at the monthly average still blows up in April — and how to flatten the spike with two simple moves and worked numbers.
The Worst Month for Household Bills in America: A Bill-Collision Study
I mapped property-tax installments, insurance renewals, registration and Tax Day across the year. April is the worst month for household bills in America.
The Annual Bills Every Homeowner and Car Owner Should Plan For
A checklist of the once- or twice-a-year bills that blindside homeowners and drivers — what they are, how often they hit, and how to plan for each.
How to Budget for Irregular Expenses (Without the Annual Panic)
A simple, repeatable way to handle the bills that don't come monthly — insurance, property tax, registration, holidays — so the heavy months stop ambushing you.
Why we built this
Most people aren’t bad with money — they’re budgeting the wrong unit of time. A monthly budget looks fine right up until April, when a property-tax installment, an insurance renewal and a registration fee all land in the same four weeks. The bills were never secret; nobody had just added them up side by side. BillMapper does that one thing well: it lays a year of irregular bills on a calendar so the heavy months stop being a surprise.
How it works
- List your lumpy bills — amount, how often, which month. Your list saves in your browser, so you can come back and update it.
- See your year on a calendar, with the worst month flagged and the even monthly set-aside that pre-funds everything.
- Take it with you — print a one-page copy or export the due dates to your own calendar. Nothing you type is uploaded, ever.