Improving your budget process for business travel expenses

- Bottom-up budgeting
- Top-down budgeting
- Scientific estimate budgeting
- Simplify your budgeting process by centralizing travel expenses
- The Rillet + Ramp powerup

It’s that time of year again—budgeting season (odd how it keeps happening). This is often the most stressful time of year for folks in finance and accounting.
In addition to our regular jobs, we now need to haggle with department heads over their expenses, push growth for more revenue while simultaneously cutting marketing spend, and hope that, at the end of the day, the board actually approves it all. We certainly can’t avoid budgeting season, but there are things we can do to make it better.
Travel expenses often make up a significant portion of corporate card spend each month. Using the correct method to budget these expenses will help lead to a smoother process and a more accurate model. We discuss three methods below.
Bottom-up budgeting
One method, often used at larger companies, is commonly called bottom-up. Model everything: the average cost of flights, the number of flights expected each month, the cost of hotels and expected nights, and the daily food expense.
This will obviously take considerable time, both for the finance team to build the structure and for department heads to make accurate estimates. Finance teams can reduce turnaround time from other teams by inputting default assumptions based on the prior year’s spend.
Including all drivers means you know exactly what causes the variance relative to your budget. If you are over budget, you can see whether that was driven by more flights than expected, more expensive hotels, or something else.
The method is preferred in corporate settings or for professional service providers who travel extensively. The ability to explain the variance in minute detail is valued more highly than the time required to include each driver. Startups or smaller companies often don’t have the luxury of time and must turn to other methods.
Top-down budgeting
Naturally, the alternative to bottom-up is top-down. This tends to be more of a brute-force approach and is much simpler. You take the average people expenses per headcount from the last year, adjust up or down depending on the revenue forecast, and you are done.
In this case, time is considered more valuable than precision. Significant variances will be much more difficult to explain, but if the company has fewer than 50 employees or travel expenses are minimal, this method is ideal.
Scientific estimate budgeting
The final method combines the prior two and blends the best of both. You start the same as top-down, with the average spend per headcount, but with some specific adjustments.
First, every department is different. Sales and marketing will likely travel the most, while the finance team may travel only once a year for the annual offsite. Having a modern ERP in place, particularly one well integrated with Ramp and your HRIS, can make this a quick calculation.
Second, adjust for seasonality. Since many tech conferences occur during late summer and fall, the sales and marketing budget should be higher in those months. Conversely, travel is less likely during December and January due to holidays.
Third, ensure the travel expenses are in line with the hiring plan. This comes naturally in the bottoms-up method but is easier to forget when calculating from the top down.
The scientific estimate provides you with the greatest level of specificity while also accurately valuing the time of the finance team and the department heads.
Simplify your budgeting process by centralizing travel expenses
Ramp Travel consolidates employee travel expenses into one platform to help finance teams control travel spend from the start. So when it’s time for budgeting, you know your employees’ travel expenses are in one place, properly prepared for analysis, and synced into your ERP.

Not only does Ramp Travel help you budget and forecast better, but it can enable you to set and enforce a travel policy that automatically creates guardrails on per diems, flights, and hotel rates, preventing out-of-policy spend. Ramp even enables you to apply specific rules to different teams.
Simplify your expense management with Ramp
The Rillet + Ramp powerup
Regardless of which method you choose, combining Rillet and Ramp can reduce the time you spend preparing for the annual budgeting cycle. Rillet is the next-gen ERP and natively integrates with Ramp, so your expenses always align with your financial statements.
Like Ramp, Rillet believes that quality accounting data is the foundation of successful companies. When finance leaders connect Ramp to Rillet, their existing accounting rules automatically transfer, enabling the team to see Ramp transactions directly in the general ledger in a drillable format.

Many legacy GL systems lack department functionality. This forces teams to spend extra time mapping expenses and crowds the financial statements with needless GL accounts. In Rillet, departments set up in Ramp are directly mapped into the ERP, ensuring each expense is categorized directly and can be accurately estimated for the following year.
Users of Rillet + Ramp report over 6 days saved in their close process, freeing up precious time that can now be spent planning for next year.
This post was written in collaboration with Stephen Hedlund, head of finance at Rillet, a next-gen ERP built for complex SaaS and AI companies. Rillet natively integrates with Ramp, your CRM, HRIS, and payment processors like Stripe and Avalara.

“In the public sector, every hour and every dollar belongs to the taxpayer. We can't afford to waste either. Ramp ensures we don't.”
Carly Ching
Finance Specialist, City of Ketchum

“Ramp gives us one structured intake, one set of guardrails, and clean data end‑to‑end— that’s how we save 20 hours/month and buy back days at close.”
David Eckstein
CFO, Vanta

“Ramp is the only vendor that can service all of our employees across the globe in one unified system. They handle multiple currencies seamlessly, integrate with all of our accounting systems, and thanks to their customizable card and policy controls, we're compliant worldwide. ”
Brandon Zell
Chief Accounting Officer, Notion

“When our teams need something, they usually need it right away. The more time we can save doing all those tedious tasks, the more time we can dedicate to supporting our student-athletes.”
Sarah Harris
Secretary, The University of Tennessee Athletics Foundation, Inc.

“Ramp had everything we were looking for, and even things we weren't looking for. The policy aspects, that's something I never even dreamed of that a purchasing card program could handle.”
Doug Volesky
Director of Finance, City of Mount Vernon

“Switching from Brex to Ramp wasn't just a platform swap—it was a strategic upgrade that aligned with our mission to be agile, efficient, and financially savvy.”
Lily Liu
CEO, Piñata

“With Ramp, everything lives in one place. You can click into a vendor and see every transaction, invoice, and contract. That didn't exist in Zip. It's made approvals much faster because decision-makers aren't chasing down information—they have it all at their fingertips.”
Ryan Williams
Manager, Contract and Vendor Management, Advisor360°

“The ability to create flexible parameters, such as allowing bookings up to 25% above market rate, has been really good for us. Plus, having all the information within the same platform is really valuable.”
Caroline Hill
Assistant Controller, Sana Benefits
