Quick answer
Give every part of the day a planned amount, then record three things for each vendor: the quoted price, what you have paid, and when the next payment is due. Compare each quote with its own line, not with the total, and keep the due dates where you will see them.
Plan first, then record
A budget is only useful if each part of the day has a planned amount before the quotes arrive. Set your total, split it into lines, and only then start collecting prices. Without planned lines, every quote looks reasonable on its own and the total drifts.
Record three numbers per vendor
For each vendor you book, keep the quoted price, the amount you have already paid, and the date and size of the next payment. That is enough to answer the two questions that matter: how much is still to pay, and when.
Compare a quote with its line
When a quote comes in over its line, decide there and then where the difference comes from. Raise this line, lower another, or look for a different vendor. Making that call with the trade-off in front of you is the whole point of tracking.
Keep due dates visible
Deposits and instalments are spread across the year, and final balances usually fall in the last weeks. Our checklist puts final vendor payments 1 month before the wedding. A missed due date can cost a booking, so keep every date in a calendar or planner that reminds you.
Note what is included
Write down what each price includes: hours, staff, delivery, tax and service charges. Two quotes with the same number can cover very different things, and the extras are where budgets quietly grow.
Update it as you go
Tracking only works if it is current. Record a payment the day you make it and a quote the day you receive it. Ten minutes a week is enough, and it is far easier than reconstructing a year of emails in the final month.
Frequently asked questions
What should we track for each wedding vendor?
The quoted price, what is included, what you have paid so far, and the date and amount of the next payment.
When are final vendor payments usually due?
It depends on each contract, so check yours. Our planning checklist schedules final vendor payments 1 month before the wedding.
Is a spreadsheet enough to track a wedding budget?
It can be, if you keep it up to date. Most problems come from a sheet that stops being updated, so use whatever you will actually open every week.
What do we do when a quote is over budget?
Decide where the difference comes from right away: raise that line and lower another, negotiate, or look for a different vendor. The total should not move without a decision.