Every December, the same story plays out across the country. According to Achieve’s Season of Spending report from October 2025, 79 percent of consumers had less than 1,000 dollars set aside for that year’s holiday season, and 26 percent had not set anything aside at all. More than half expected to carry debt from the season for months afterward. A separate LendingTree survey found that Americans who took on holiday debt in 2025 carried an average balance of 1,223 dollars, up from 1,181 dollars the year before, with most expecting it to take three months or longer to pay off.
None of this is really about the holidays specifically. It is about how poorly most budgets handle any expense that does not show up every single month. Seasonal costs, holidays, summer travel, back to school, an annual insurance premium, tend to get treated as emergencies even though they arrive on a calendar you could circle a year in advance.
The good news is that this is one of the more fixable problems in personal finance. It does not require earning more or cutting back dramatically. It mostly requires shifting a single habit, spreading a predictable cost out over the months before it arrives instead of feeling the entire weight of it in a single week.
What Actually Counts as a Seasonal Expense
The word seasonal makes people think only of December, but the category is much wider than that. A seasonal expense is really any cost that is real, recurring, and predictable, but does not happen monthly, which means it slips through a budget built entirely around monthly categories.
• Holiday spending, gifts, travel, and hosting, concentrated in November and December
• Back to school costs, supplies, clothing, and fees that land every August or September
• Summer travel and camp costs, often the single biggest discretionary spend of the year
• Annual or semiannual insurance premiums, for a car, a home, or life insurance
• Property taxes, often billed once or twice a year rather than monthly
• Seasonal utility spikes, heating in winter, cooling in summer
• Once a year costs like car registration, membership renewals, or annual subscriptions
Why These Expenses Keep Catching People Off Guard
Most budgeting habits, and most budgeting apps, are built around a monthly rhythm, income in, fixed bills out, whatever is left divided into categories. That structure works fine for rent and groceries. It quietly breaks down for anything that only happens once or twice a year, because the expense never shows up in the month you are actually planning for until it suddenly does.
The result is a familiar pattern. A cost that was always going to happen gets treated like an emergency the moment it arrives, and the easiest way to cover it in the moment is a credit card. A YouGov survey conducted in January 2026 found that 21 percent of US adults had borrowed money specifically to cover Christmas related spending in 2025, and 77 percent of those who borrowed used credit cards to do it. The expense was never actually unpredictable. The planning for it just never happened.
There is also a psychological piece to this. A cost that arrives once a year is easy to underestimate in the months leading up to it, because it is simply not on your radar in April the way rent is on your radar every single month. By the time November arrives, the gap between what was saved and what is needed has already become a stressful surprise rather than a manageable plan.
A seasonal expense is not the same thing as an emergency. An emergency is something you could not have seen coming. A seasonal expense is something you can circle on next year’s calendar right now.
The Sinking Fund Method, Explained Simply
The most reliable fix for this is not a stricter budget, it is a small savings account with a job to do. This approach is sometimes called a sinking fund, and the idea is simple. Instead of feeling one large expense all at once in December, you divide the expected cost by the number of months until it arrives and set that smaller amount aside automatically each month, so the money is already there when the bill shows up.
A 1,200 dollar holiday season, split across twelve months starting in January, is 100 dollars a month, an amount that is far easier to absorb into a regular budget than a lump sum in the final weeks of the year. The same logic works for a summer vacation, a car insurance renewal, or a back to school shopping trip. Some people keep a single sinking fund account for everything seasonal and simply track which portion belongs to which expense. Others prefer a separate small account for each one. Either approach works, what matters is that the money is set aside automatically rather than left to willpower in the moment.
A Simple Way to Map Out Your Year
| Expense | Typical timing | Monthly set aside if saving for a year |
| Holiday season | November, December | Total expected cost divided by 12 |
| Back to school | August, September | Total expected cost divided by 12 |
| Summer travel | June through August | Total expected cost divided by 12 |
| Car or home insurance | Twice a year, varies | Total premium divided by 6 |
| Property tax | Once or twice a year | Total bill divided by 12 or 6 |
The exact numbers matter less than the habit. Once every predictable seasonal cost has a monthly number attached to it, the year stops feeling like a series of financial surprises and starts feeling like something you can actually see coming.
Steps to Build Your Own Plan
Look back before you plan forward
The clearest guide to next year’s seasonal spending is usually last year’s. Pull up bank and credit card statements from the same season a year ago and add up what actually got spent, not what you meant to spend. Most people are surprised by how consistent this number is from year to year.
List every predictable cost, not just the obvious ones
Holidays and summer vacation are easy to remember. Property tax, an annual insurance premium, or a membership renewal are easy to forget precisely because they only come around once. Write down everything that happens every year but not every month.
Divide, then automate
Once each expense has a total, divide it by the number of months until it is due and set up an automatic transfer for that amount into a separate savings account. Automating it removes the need to remember or feel motivated every single month.
Review it once a season, not once a year
Costs shift. A quick check every few months, rather than one distant annual review, makes it easy to adjust the monthly amount before a shortfall shows up rather than after.
Where AI Finance Tools Can Actually Help Here
Spotting a seasonal pattern by hand means digging through months of old statements, which is exactly the kind of task most people put off indefinitely. This is one place where a connected AI finance assistant does something genuinely useful rather than just convenient. WealthNX, for example, can look across a full year of connected transaction history and surface an informational observation like how much was spent in a particular category during the same season last year, without anyone manually pulling up old statements.
That kind of visibility does not replace the planning itself, setting aside money still has to happen, but it removes the most tedious part of the process, figuring out what the number should be in the first place. WealthNX connects accounts through read only access, meaning it can see this transaction history but cannot move funds, and it recently completed ISO 27001 certification, the internationally recognized standard for information security management. WealthNX is the publisher of this blog, and that connection is disclosed here openly rather than presented as independent advice.
The hardest part of planning for a seasonal expense is usually not saving the money, it is figuring out how much to expect. Seeing your own past spending clearly solves most of that problem on its own.
The Honest Takeaway
Seasonal expenses only feel unpredictable because most budgeting habits are not built to notice them until they arrive. The costs themselves follow the calendar closely enough to plan around a year in advance. A small monthly amount set aside automatically, based on what was actually spent last time, turns a once a year financial jolt into something far quieter and far more manageable.
Frequently Asked Questions
What is a sinking fund, and how is it different from an emergency fund?
A sinking fund is money set aside for a specific, expected future expense, like a holiday season or a car insurance premium. An emergency fund is for the unexpected. Both matter, but they serve different purposes, and mixing them together tends to leave neither one properly funded.
How much should I be saving for the holidays each month?
A reasonable starting point is to look at what you actually spent last holiday season, including gifts, travel, and hosting, and divide that total by 12. Automating that amount as a monthly transfer starting early in the year tends to be far less painful than covering the full cost in November and December.
What are the most commonly overlooked seasonal expenses?
Property taxes, annual insurance premiums, and membership or subscription renewals are the ones people forget most often, precisely because they only happen once a year and rarely appear on a typical monthly budget.
Can an AI finance app help me plan for seasonal spending?
A connected AI finance assistant can review past transaction history and surface an informational observation about what was spent in a similar period previously, which makes estimating future seasonal costs considerably easier. It does not replace the actual saving, and any figures it provides are informational only.
Sources
• Achieve Center for Consumer Insights, 2025 Season of Spending Report, October 2025.
• LendingTree, 2025 holiday spending and debt survey of over 2,000 U.S. consumers.
• YouGov Surveys, Christmas 2025 borrowing survey, conducted January 2026.
Disclaimer
This article is for general informational and educational purposes only and does not constitute financial advice. Statistics cited are drawn from publicly available third party surveys as noted in the Sources section. WealthNX is the publisher of this blog and is named here as a recommended app; this recommendation is disclosed openly and is not an independent review. WealthNX holds ISO 27001 certification, the internationally recognized standard for information security management.
All AI generated observations from finance apps are informational only and are not personalised financial advice. Responses are generated from connected account data and may be affected by incomplete or delayed information. For advice tailored to your situation, consult a licensed financial advisor.
