15. Commitments and Contingencies

Operating Lease Commitments

At December 30, 2017, CRA had the following minimum rental commitments for office space and equipment leases, all of which are under non-cancelable operating leases (in thousands):

Fiscal Year	Rental Commitments
2018	$	12,340
2019		13,652
2020		13,578
2021		13,432
2022		13,590
Thereafter		67,136

	$	133,728

Certain office leases contain renewal options that CRA may exercise at its discretion, which were not included in the amounts above. Rent expense was approximately $12.1 million, $10.4 million, and $11.6 million in fiscal 2017, fiscal 2016, and fiscal 2015, respectively.

On February 24, 2014, CRA entered into an agreement to lease 57,602 square feet of office space in Boston, Massachusetts. The lease commenced on February 1, 2015 and is set to expire on July 31, 2025. Subject to certain conditions, the lease will be extendible for two five-year periods. The annual base rent under the lease is approximately $2.4 million for the first lease year, and is subject to annual increases of approximately 2% per annum. On February 24, 2015, CRA signed a first amendment to lease additional office space of 10,057 square feet for a total of 67,659 square feet. The lease commenced on June 15, 2015 and is set to expire on June 30, 2020. Subject to certain conditions, the lease will be extendible for one three-year period. The annual fixed rent under the lease is approximately $0.5 million. The original lease included a tenant improvement allowance of approximately $4.8 million, as well as a rent abatement of approximately $1.2 million. The performance of CRA's obligations under the lease is secured by a $1.6 million letter of credit.

On November 29, 1999, CRA entered into an agreement to lease 44,932 square feet of office space in Washington, D.C. The lease commenced on May 1, 2000 and was set to expire on February 28, 2011. The original annual base rent was approximately $1.4 million for the first year, and subject to annual increases of approximately 2% per annum. Subsequent to entering into the lease, the original lease has had six amendments with the last being signed on July 11, 2016. The amendment consists of an additional 6,366 square feet, is set to expire on December 31, 2027, and has an annual base rent of approximately $0.3 million for the first year, subject to increases of 2.25% per annum. The amended and restated addendum includes a tenant improvement allowance of approximately $0.5 million and a rent abatement of approximately $0.2 million. The performance of CRA's obligations under the lease is secured by a $0.2 million letter of credit.

On July 15, 2015, CRA entered into an agreement to lease 25,261 square feet of office space in New York, New York. The lease commenced on August 1, 2015 with a rent commencement date of June 1, 2016 and was set to expire on May 31, 2026. The original annual base rent was approximately $1.8 million per annum for the first five years of the lease's base term, and subject to a maximum annual rent of $2.0 million. Subsequent to entering into the lease, the original lease was amended on April 21, 2017. The amendment extends the term of the previously leased space and consists of an additional 16,587 square feet, is set to expire on April 30, 2028, and includes a base rent abatement of approximately $1.2 million, as well as a tenant improvement allowance of approximately $1.4 million. Following an initial rent abatement period, the annual base rent will be approximately $1.2 million per year, subject to annual increases of approximately 8% after five years. The performance of CRA's obligations under the lease is secured by a $1.3 million letter of credit.

On February 14, 2008, CRA entered into an agreement to lease 36,570 square feet of office space in Chicago, Illinois. The lease commenced on April 1, 2008 with a rent commencement date of August 1, 2008 and was set to expire on July 31, 2018. The annual base rent was approximately $1.0 million in fiscal year 2015 and is subject to 2.5% increases per annum. On May 8, 2017, CRA signed a first amendment to extend the term of the previously leased space of 41,642 square feet for an additional ten years ending on July 31, 2028. The amendment includes a base rent abatement of approximately $0.9 million, as well as a tenant improvement allowance of approximately $2.3 million. Following an initial rent abatement period, the annual base rent will be approximately $1.1 million per year, subject to annual increases of approximately 2.5% per year. At the end of the lease, CRA will be responsible to return the vacated floors to their original condition at CRA's expense.

On May 20, 2016, CRA entered into an agreement to lease 23,035 square feet of office space in London, UK for the 4th and ground floors. The leases for both floors was set to expire on May 19, 2031. The initial base rent for the two floors is approximately £1.6 million per year, and is subject to increase every five years, based on rental market conditions at that time. On November 20, 2017, CRA agreed to the head of terms to lease an additional 7,700 square feet in addition to the existing office space, set to expire on May 19, 2031. The initial base rent for the additional space is approximately £0.5 million per year, and is subject to increase every five years, based on rental market conditions at that time. At the end of the leases, CRA will be responsible to return the vacated floors to original condition at CRA's expense.

On July 21, 2017, CRA entered into the first amendment of the San Francisco, CA lease, originally entered into with C1, for an additional 9,206 square feet of office space and to extend the terms for an additional eight years ending on September 30, 2025 with annual base rent of approximately $0.9 million per year, subject to increases of 3% per annum. The amendment includes a base rent abatement of approximately $0.4 million, as well as a tenant improvement allowance of approximately $1.2 million. The performance of CRA's obligations under the lease is secured by a $0.1 million letter of credit.

Other

CRA is party to standby letters of credit with its bank in support of the minimum future lease payments under leases for permanent office space amounting to $3.6 million as of December 30, 2017.

Contingencies

CRA is subject to legal actions arising in the ordinary course of business. In management's opinion, CRA believes it has adequate legal defenses and/or insurance coverage with respect to the eventuality of such actions. CRA does not believe any settlement or judgment relating to any pending legal action would materially affect its financial position or results of operations.